Chapter 31

Dr. Anderson obtained this species at Ponsee in Burmah, at an elevation of 3500 feet, and Dr. Jerdon, at Darjeeling, at from 4000 to 6000 feet. This species is synonymous with Blyth's _S. Barbei_.

NO. 294. SCIURUS BERDMOREI. _Berdmore's Ground-Squirrel_.

HABITAT.--Tenasserim and Martaban.

DESCRIPTION.--General colour brownish, with a distinct rufous tinge on the middle of the back. It is punctulated with yellowish on the head, sides of face and body and outside of limbs, and with rich rufous on the middle of the back. An obscure narrow black line along the middle of the back from between the shoulders, but only extending half way down the trunk. On the sides of the back a yellow line from shoulder to articulation of femur; this is margined below with a broad black band, and above by an obscure dusky line. There is a broad pale yellow linear area below the former of these two dark bands, the portion of the side below it being concolorous with the thighs and fore-limbs. The rufous area of the back is confined between the two uppermost yellow lines; ears are large; all under-parts white, slightly washed here and there with yellowish; the tail moderately bushy, all the hairs annulated with four alternative orange and black bands, the terminal black band being occasionally tipped with white, and being as broad as the three remaining bands, so that the tail has a decidedly black tint washed with whitish, the orange bands, however, appearing through the black.

SIZE.--Head and body, about 7-3/4 inches; tail without hair, 5 inches.

NO. 295. SCIURUS QUINQUESTRIATUS. _The Stripe-bellied Squirrel_.

HABITAT.--Kakhyen hills, on the Burmo-Chinese frontier.

DESCRIPTION.--"Above grizzled olive, brownish-grey, with a distinct rufous tint, deepest on the dorsal surface; annulation fine, as in the grizzled squirrels generally; chin and throat obscurely grizzled greyish, washed with reddish; a rufous grizzled blackish-brown band from the chest along the middle line of the belly to the vent; external of this, on either side, a broad pure white well-defined band from the side to the chest along the belly and prolonged along the inguinal region to the vent; a broad black band from the hollow of the axilla along the side of the belly, expanding on the inside of the thighs, where it is faintly washed with greyish; inside of the fore-limbs blackish, washed with greyish; toes black, with rufous annulations. Tail nearly as long as the body and head, concolorous with body, but the black and rufous annulations much broader and more marked, assuming the form of indistinct rufous and black rings on the posterior third; tip of tail jet black, narrowly terminated with greyish."--_Dr. J. Anderson_ in 'Proc. Zool. Soc.' 1871, p. 142.

SIZE.--Head and body, about 9-1/2 inches; tail, 7-1/4 inches.

This curious squirrel was first discovered and named by Dr. Anderson, who states that it was common at Ponsee on the Kakhyen range of hills east of Bhamo, at an elevation of from 2000 to 3000 feet, and as yet it has only been found on those hills. There is a coloured plate of it in the 'Proceedings of the Zoological Society' for 1871.

* * * * *

The next animal forms a curious link in resemblance between the Tupaiidae and the squirrels. I mentioned some time back that the first Tupaia was taken for a squirrel; and certainly, to look at this long-snouted squirrel, one might easily be misled into supposing it to be a Tupaia, till an examination of its dentition proved it to be a rodent. It is supposed to be a Malayan species, but I was shown not long ago a specimen in Mr. Hume's collection which I understood Mr. Davison to say he had procured in Burmah. It has been classed by Dr. Gray in a separate genus, _Rhinosciurus_.

NO. 296. SCIURUS (RHINOSCIURUS) TUPAOIDES. _The Long-nosed Squirrel_.

HABITAT.--The Malayan peninsula and Borneo, and I believe the Tenasserim provinces.

DESCRIPTION.--This animal differs from all other squirrels by the extreme length of its pointed muzzle, with which is associated a long and narrow skull. The coloration varies from light to dark, and almost blackish-brown; the tail is shorter than the body, moderately bushy, narrow at the base, but expanding towards the tip; the hairs are broadly banded with four alternate pale and dark brown bands, the last being the darkest and broadest, with a pale tip; the under-parts are white in some, rich orange yellow in others.

SIZE.--Head and body, 7-1/2 inches; tail reaches to the eye.

* * * * *

The Flying Squirrels next engage our attention. In several groups of animals of strictly arboreal habits, nature has gone beyond the ordinary limits of agility afforded by muscular limbs alone, and has supplemented those limbs with elastic membranes which act like a parachute when the animal takes a leap into space, and gives it a gradual and easy descent. Amongst the lemurs the _Galeopithecus_, the _Pteromys_ in the squirrels, and the _Anomalurus_ in another family of rodents, are all thus provided with the apparatus necessary to enable them to float awhile in the air, for flying is scarcely the proper term for the letting-down easy principle of the mechanism in question.

The flying squirrels, with which we have now to deal, are in general details the same as ordinary squirrels, but the skin of the flanks is extended between the fore and hind limbs, which, when spread out, stretches it into a wide parachute, increased in front by means of a bony spur which projects from the wrist. These animals have been subdivided into the large round-tailed flying squirrels, _Pteromys_, and the small flat-tailed flying squirrels, _Sciuropterus_. The distinction was primarily made by F. Cuvier on the character of the teeth, as he considered _Sciuropterus_ to have a less complex system of folds in the enamel of the molars, more like the ordinary squirrels than _Pteromys_; but modern research has proved that this is not a good ground for distinction. Dr. Anderson has lately examined the dentition in eleven species of _Pteromys_ and _Sciuropterus_, and he says: "According to my observations the form of the enamel folds in youth are essentially similar, consisting of a series of tubercular folds which are marked with wavy lines in some, and are smooth in others, but in all there is a marked conformity to a common type. The seemingly more complex character of the folds appears to depend on the extent to which the tubercular ridges are worn by use." He also questions the propriety of the separation according to the distichous arrangement of the hairs of the tail. After a careful examination of the organ in nearly all the members of the series, he writes: "I have failed to detect that it is essentially distinctive of them--that is, that the distichous arrangement of the hairs is always associated with a diminutive species; but at the same time there can be no doubt that it is more prevalent among such." He then goes on to show that the tail is bushy in seventeen species, partially distichous in one, and wholly so in ten, and concludes by saying: "I am therefore disposed to regard the flying squirrels generally as constituting a well-defined generic group, the parallel of the genus _Sciurus_, which consists of an extensive series of specific forms distinguished by a remarkable uniformity of structure, both in their skulls and skeletons, and in the formations of their soft parts." There is a laudable tendency nowadays amongst mammalogists to reduce as far as possible the number of genera and species, and, acting on this principle, I will follow Dr. Anderson, and treat all the Indian flying squirrels under _Pteromys_.

_GENUS PTEROMYS_.

General anatomy that of the squirrel, except that the skin of the flanks is extended between the limbs in such a manner as to form a parachute when the fore and hind legs are stretched out in the act of springing from tree to tree.

NO. 297. PTEROMYS ORAL. _The Brown Flying Squirrel_ (_Pteromys petaurista in Jerdon, No. 160_).

NATIVE NAMES.--_Oral_ of the Coles; _Pakya_, Mahrathi; _Parachatea_, Malabarese; _Egala dandoleyna_, Singhalese.

HABITAT.--India, wherever there are large forests; Ceylon.

DESCRIPTION.--Upper parts dusky maroon black grizzled with white; this effect being due to the ends of the hairs being white, tipped with a small black point.

The muzzle and around the eyes, and the feet are black; the limbs and side membrane a lighter rufous maroon; the male has an irregular rufous patch on the sides of the neck, according to Elliot, which in the female is a pale fawn colour; the tail is rather longer than the body, and very bushy; its terminal two-thirds or three-fourths are black or blackish--sometimes (rarely) a little white at the extreme tip; the under-parts are dingy brownish-grey or nearly white. The female has six mammae--two pectoral and four ventral.

SIZE.--Head and body, 20 inches; tail, 21 inches; breadth of expanse, 21 to 24.

This species is nocturnal in its habits as noticed by Mr. Baker ('Journ. As. Soc. Beng.' 1859, vol. xxviii. p. 287), Jerdon and others.

Mr. Baker says it makes a noise at night in the depths of the jungle which is alarming to strangers. On the other hand Tickell, who was one of the first to bring it to notice, says its voice is seldom heard, and it is a weak, low, soft monotone quickly repeated, so low that in the same room you require to listen attentively to distinguish it. "It is to the Coles a sound ominous of domestic affliction. When angry the oral seldom bites, but scratches with its fore-claws, grunting at the same time like a guinea-pig." "When taken young it becomes a most engaging pet. It can be reared on goat's or cow's milk,[21] and in about three weeks will begin to nibble fruit of any kind. During the day it sleeps much, either sitting with its back bent into a circle, and its head thrust down to its belly, or lying on its back with the legs and parachute extended--a position it is fond of in sultry weather. During the night time it is incessantly on the move."

[Footnote 21: I advise half water in the case of cow's milk, or one quarter water with buffalo milk.--R. A. S.]

Jerdon says of it: "It frequents the loftiest trees in the thickest parts of the forest, and is quite nocturnal in its habits, usually making its appearance when quite dusk. The natives discover its whereabouts by noting the droppings beneath the trees it frequents. It is said to keep in holes of trees during the day, and breeds in the same places. In the Wynaad many are killed, and a few captured alive by the Coorumbars, a jungle race of aborigines, who are usually employed to fell the forest trees in clearing for coffee; and I have had several sent to me alive, caught in this way, but could not keep them for any time. It lives chiefly on fruits of various kinds; also on bark, shoots, &c., and, Tickell says, occasionally on beetles and the larvae of insects."

Jerdon says he had several times witnessed the flight of this species from tree to tree, and on one occasion he noted a flight of over sixty yards.

"Of course it was very close to the ground when it neared the tree, and the last few feet of its flight were slightly upwards, which I have also noticed at other times." I think Wallace has observed the same of the _Galeopithecus_. How this upward motion is accomplished more careful investigation will show; in all probability the depression or elevation of the tail may cause a deviation from a fixed course. According to Elliot it is very gentle, timid, and may be tamed, but from its delicacy is difficult to preserve. The fur is soft, beautiful and much valued. Jerdon gives the localities in which he has found it to be most common: Malabar, Travancore (the Marquis of Tweeddale, according to Dr. Anderson, got a specimen from this locality of a much lighter colour than usual), the Bustar forests in Central India, Vindhian mountains near Mhow, the Northern Circars, and the Midnapore jungles.

NO. 298. PTEROMYS CINERACEUS. _The Ashy Flying Squirrel_.

NATIVE NAME.--_Shau-byau_ in Arakan.

HABITAT.--Assam, Burmah, viz. Arakan, Pegu and Tenasserim provinces.

DESCRIPTION.--Very like the last, but with a greyish fur, and almost white tail, with a black tip.

The fur generally is a mixture of pale grey and brownish, the hairs of the head and back having a whitish sub-terminal band; the tail consists almost entirely of the greyish hairs; the parachute is reddish brown; the under-parts white. Blyth, however, mentions a specimen from Tenasserim which is unusually rufous, with the tail concolorous with the upper parts.

SIZE.--Same as the last.

It is open to question whether this is not identical with _Pteromys oral_, merely a local variety. Blyth so termed it; and from what Dr. Anderson has written on the subject, I gather that he, too, inclines to the same opinion, as he says: "The dimensions are the same as those of _P. oral_, Tickell, of which it will probably prove to be a local race."

NO. 299. PTEROMYS YUNNANENSIS. _The Yunnan Flying Squirrel_.

HABITAT.--Kananzan mountains; Burmo-Chinese frontier.

DESCRIPTION.--Dr. Anderson, who discovered and named this species, describes it as follows: "The general colour is a rich dark maroon chestnut on all the upper parts, the head and back in some being finely speckled with white, which is most marked in the young, but is always most profuse on the posterior half of the back, which in some individuals has almost a hoary tinge, from the extent to which the annulation of the hairs is carried.

"In the adult, the upper surface of the parachute is of the same colour as the back, and the hairs are not annulated, except along its margin; but in younger specimens they are partially so on the upper surface, as are also the hairs on the first three or six inches of the tail, which are concolorous with the back, but broadly tipped with black, while the remaining portion of the tail is rich glossy black; the sides of the face, below the eye and ear, are yellowish-grey, mixed with chestnut, and the chin is dusky; the paws are rich black, also the margins of the limbs; the under surface is clad with a yellowish-white, rather woolly fur, which in some tends to a chestnut tint in the middle line, and to a darker tint of the same colour at the margin of the parachute.

"The basal portion of the fur of the upper parts is a dark greyish-brown, the hairs at their base being wavy; then follows a palish chestnut band, succeeded by a dark maroon chestnut, which either may or may not have a pure white sub-apical band, the tips of the hairs being glossy deep maroon chestnut, in some verging on black.

"The ears are large and rounded, and very sparsely covered with black hairs externally, with chestnut-coloured hairs on the anterior, and black on the posterior half of the dorsal surface.

"The hairs on the outer side of the tarsus form a rather long and dense brush; the tail is moderately bushy."--'Anat. and Zool. Res.,' p. 282.

SIZE.--Dr. Anderson only got skins of this beautiful squirrel, so accurate dimensions cannot be given, but the largest skin measured from muzzle to root of tail 24 inches, the tail being the same.

NO. 300. PTEROMYS MELANOPTERUS. _The Black-flanked Flying Squirrel_.

HABITAT.--Thibet.

DESCRIPTION.--The back and top of the head are greyish-yellowish, the hairs being leaden grey at the base, passing into yellow, the sub-terminal part being brown, with a minute dark point; the upper surface of the parachute is almost wholly black, with a greyish-white border; under surface yellow; the belly greyish-ashy; feet black; limbs and tail concolorous with the body, the latter very bushy.

SIZE.--Head and body, about 19-1/4 inches; tail, 17-1/4 inches.

I have included this species, although it does not belong to India proper; still it would be well if travellers and sportsmen exploring our Thibetan frontiers would keep a look-out for this animal. At present all we know of it is from Professor Milne-Edwards's description of animals collected by the Abbe David, to whom we are also indebted for the next species.

NO. 301. PTEROMYS ALBORUFUS. _The Red and White Flying Squirrel_.

HABITAT.--Thibet; district of Moupin.

DESCRIPTION.--I have but a bare note of this species taken long ago from Milne-Edwards's work on the Mammals of Thibet, so I will quote Dr. Anderson's description from the types he examined: "The head, the sides of the neck, the throat and upper part of the chest, variegated with white, through which the rich maroon of the ground colour is partially seen, and it forms a ring around the eye; the hinder part of the back is yellow, and the tail, immediately beyond its base, is also yellowish for a short way, fading into the deep maroon of its latter two-thirds. It has no black tip. The feet are concolorous with the body; the under parts are pale rich orange yellow; the ears are large and moderately pointed."--'Anat. and Zool. Res.,' p. 284.

SIZE.--Head and body, about 23 inches; tail, 16 inches.

NO. 302. PTEROMYS MAGNIFICUS. _The Red-bellied Flying Squirrel_ (_Jerdon's No. 162_).

NATIVE NAME.--_Biyom_, Lepcha.

HABITAT.--South-eastern Himalayas, Nepal, Sikim, Bhotan; also in the hill ranges of Assam.

DESCRIPTION.--Upper parts dark chestnut or a rich lustrous dark maroon chestnut, with a golden yellow mesial line in some; the hairs are black tipped, the dark portions of the back being finely but obscurely punctulated with dark orange; the shoulders and thighs are golden yellow, and the under-parts are orange fawn or orange red; so is also the margin of the parachute; the ears are large, semi-nude, sparsely clad with pale red hair externally, and bright red posteriorly, the base of the upper surface being clad with long hair; the sides of the face below the eyes are yellowish; there is a black zone round the eyes; the chin and the feet are blackish; the tail is orange red, tipped more or less broadly with black.

SIZE.--Head and body, about 16 inches; tail, 22 inches.

The young of this species have not the dorsal line, the head and neck are concolorous with the body, as is also the tail at its base; the under parts are pale yellowish-red. According to Dr. Anderson the skulls of _Pteromys magnificus_ and _P. oral_ differ in the shorter muzzle and the more elevated character of the inter-orbital depression of the latter. This animal is occasionally found at Darjeeling, and according to Jerdon it used to be more common there before the station was so denuded of its fine trees. It frequents the zone from 6000 to 9000 feet, and feeds on acorns, chestnuts and other hard fruit; also on young leaves and shoots. There is a coloured plate of this species in the 'Journal of the Asiatic Society of Bengal,' vol. xiii. part i. p. 67.

NO. 303. PTEROMYS ALBIVENTER. _The White-bellied Flying Squirrel_ (_Pteromys inornatus of Jerdon, No. 161_).

NATIVE NAME.--_Rusigugar_, i.e., flying rat, Kashmiri.

HABITAT.--From Nepal, along the North-western Himalayas to Kashmir.

DESCRIPTION.--Upper parts grizzled reddish-brown or dark grey with a rufous tinge, or a reddish-bay, darker on the upper surface of the parachute, and outside of limbs; head, neck, and breast greyish-rufous; cheeks grey; chin, throat and lower part of breast white, faintly tinged with rufous in the belly; under part of parachute rufous, tinged white, with a greyish posterior margin. Occasionally a dark brown band over the nose and round the eyes; the whiskers and feet blackish.

SIZE.--Head and body, 14 inches; tail, 16 inches.

This is a common squirrel at Simla. One was killed close to the house in which I was staying in 1880 at the Chota Simla end of the station by a native servant, who threw a stick at it, and knocked it off a bough, and I heard of two living ones being hawked about for sale about the same time--which, to my regret, I failed to secure, some one having bought them. They are common also in Kashmir, where they live in holes made in the bark of dead fir-trees. They are said to hybernate during the season there. A melanoid variety of this species is mentioned by Dr. Anderson as being in the Leyden Museum. It was obtained by Dr. Jerdon in Kashmir, and presented to the Museum by the late Marquis of Tweeddale.

NO. 304. PTEROMYS CANICEPS. _The Grey-headed Flying Squirrel_ (_Sciuropterus caniceps of Jerdon, No. 163_).

NATIVE NAME.--_Biyom-chimbo_, Lepcha.

HABITAT.--Sikim and Nepal.

DESCRIPTION.--At first sight this seems to be a grey-headed form of the last species, but with larger ears; the head is iron grey; round the eyes and a patch above and below orange fulvous or chestnut; the base of the ears the same. Regarding this Dr. Anderson, on comparing it with the last, writes: "On a more critical examination of _P. caniceps_ it appears to me, judging from Hodgson's types of the species, that it has larger ears, and if this should prove to be a persistent character, then the grey head and the chestnut speck above and below the eye, and the bright chestnut tuft behind the ears, assume a specific importance which they would not otherwise have." But he adds that his observations are merely from preserved specimens, and that the question of the magnitude of the ears is one yet to be settled by further investigation of the living animal. Jerdon's description is "entire head iron-grey; orbits and base of ears deep orange fulvous; whole body above, with parachute and tail, a mixture of blackish and golden yellow; limbs deep orange ochreous; margin of parachute albescent; beneath the neck whitish; rest of the lower parts pale orange-red; tip of tail black; ears nearly nude; tail sub-distichous." The fur is softer, denser, and longer than in the last two species.

SIZE.--Head and body, about 14 inches; tail, 15 to 16 inches.

NO. 305. PTEROMYS PEARSONII. _The Hairy-footed Flying Squirrel_ (_Sciuropterus villosus of Jerdon, No. 166_).

HABITAT.--Sikim and Upper Assam.

DESCRIPTION.--Upper part of head and back rich glossy reddish-brown, grizzled with black; the parachute blackish-brown, sparsely washed with faint reddish brown.

"Fur very fine, soft, and rather long, but adpressed, and the hidden portion is almost black, narrowly tipped with the reddish-brown, the sides of the hair being blackish-brown. On the parachute only a few hairs have the reddish band, and these are most numerous towards the margin; the tail is rather bushy and but slightly distichous, and the hidden portion of its fur is pale fawn at the base, passing into pale chestnut brown, washed with dusky brown on the sides and upper surface; the margins of the eyelids are dark brown, and the sides of the face are pale rufous; the ears are moderately large and rounded, rather dark brown towards the tips, and pencilled at the base, anteriorly and posteriorly, with long delicate hairs. There are no true cheek bristles, but the moustachial hairs are very long; the under surface is pale ferruginous, palest on the mesial line, and most rufescent on the outer half of the membrane, the margin of which inferiorly is pale yellowish; the hairs on the membrane have dark slaty--almost black--bases, the ferruginous being confined to the tips; the fur of the under-parts is very soft and dense; the feet are well clad, more especially so those of the hind limbs."--_Anderson_.

SIZE.--Head and body, 8 inches; tail, 8 inches.

Jerdon says it is found at elevations of 3000 to nearly 6000 feet.

NO. 306. PTEROMYS FUSCOCAPILLUS. _The Small Travancore Flying Squirrel_ (_Sciuropterus of Jerdon, No. 167_).

HABITAT.--Southern India and Ceylon.