i. 62;

resemblance of, evidence of community of origin, i. 189.

LANGUAGES and species, identity of evidence of their gradual development, i. 59.

_Lanius_, ii. 180; characters of young, ii. 185.

_Lanius rufus_, anomalous young of, ii. 211.

LANKESTER, E. R., on comparative longevity, i. 168, 171; on the destructive effects of intemperance, i. 173.

LANUGO, of the human foetus, i. 25; ii. 375.

LAPPONIAN language, highly artificial, i. 61.

LARK, proportion of the sexes in the, i. 307; female, singing of the, ii. 54.

LARKS, attracted by a mirror, ii. 112.

LARTET, E., on the size of the brain in mammals, i. 51; comparison of cranial capacities of skulls of recent and tertiary mammals, i. 146; on _Dryopithecus_, i. 199.

_Larus_, seasonal change of plumage in, ii. 228.

LARVA, luminous, of a Brazilian beetle, i. 345.

LARYNX, muscles of the, in song-birds, ii. 55.

_Lasiocampa quercus_, attraction of males by the female, i. 311; sexual difference of colour in, i. 398.

LATHAM, R. G., on the migrations of man, i. 136.

LATOOKA, perforation of the lower lip by the women of, ii. 341.

LAURILLARD, on the abnormal division of the malar bone in man, i. 124.

LAWRENCE, W., on the superiority of savages to Europeans in power of sight, i. 118; on the colour of negro infants, ii. 318; on the fondness of savages for ornaments, ii. 338; on beardless races, ii. 349; on the beauty of the English aristocracy, ii. 357.

LAYARD, E. L., on an instance of rationality in a Cobra, ii. 30; on the pugnacity of _Gallus Stanleyi_, ii. 44.

LAYCOCK, Dr., on vital periodicity, i. 12.

LEAVES, decaying, tints of, i. 323.

LECKY, Mr., on the sense of duty, i. 71; on suicide, i. 94; on the practice of celibacy, i. 96; his view of the crimes of savages, i. 97; on the gradual rise of morality, i. 103.

LECONTE, J. L., on the stridulant organ in the Coprini and Dynastini, i. 381.

LEE, H., on the numerical proportion of the sexes in the trout, i. 308.

LEG, calf of the, artificially modified, ii. 340.

LEGITIMATE and illegitimate children, proportion of the sexes in, i. 302.

LEGS, variation of the length of the, in man, i. 108; proportions of, in soldiers and sailors, i. 116; fore, atrophied in some male butterflies, i. 344; peculiarities of, in male insects, i. 344.

"LEK" of the black-cock and capercailzie, ii. 100.

LEMOINE, Albert, on the origin of language, i. 56.

_Lemur macaco_, sexual difference of colour in, ii. 290.

LEMURIDAE, i. 195; their origin, i. 213; position and derivation of the, i. 202; ears of the, i. 23; variability of the muscles in the, i. 128.

LEMURS, uterus in the, i. 123; tailless species of, i. 194.

LEOPARDS, black, ii. 294.

LEPIDOPTERA, i. 386; numerical proportions of the sexes in the, i. 309; colouring of, i. 387; ocellated spots of, ii. 132.

_Lepidosiren_, i. 204, 212.

LENGUAS, disfigurement of the ears of the, ii. 341.

_Leptorhynchus angustatus_, pugnacity of male, i. 375.

_Leptura testacea_, difference of colour in the sexes of, i. 367.

LEQUAY, on the occurrence of the supra-condyloid foramen in the humerus of man, i. 29.

LEROY, on the wariness of young foxes in hunting-districts, i. 50; on the desertion of their young by swallows, i. 84.

LESSE, valley of the, i. 29.

LESSON, on the Birds of Paradise, i. 269, ii. 98; on the sea-elephant, ii. 278.

_Lestis bombylans_, difference of the sexes in, i. 366.

_Lethrus cephalotes_, pugnacity of the males of, i. 371, 376.

LEUCKART, R., on the _vesicula prostatica_, i. 31; on the influence of the age of parents on the sex of offspring, i. 302.

_Levator claviculae_ muscle, i. 128.

_Libellula depressa_, colour of the male, i. 363.

LIBELLULIDAE, relative size of the sexes of, i. 347; difference in the sexes of, i. 361.

LICE of domestic animals and man, i. 219.

LICENTIOUSNESS, prevalence of, among savages, i. 96; a check upon population, i. 134.

LICHTENSTEIN, on _Chera progne_, ii. 120.

LIFE, inheritance at corresponding periods of, i. 280, 285.

LIGHT, supposed effects of, i. 116; influence of, upon the colours of shells, i. 326.

LILFORD, Lord, the ruff attracted by bright objects, ii. 111.

_Limosa lapponica_, ii. 204.

_Linaria_, ii. 180.

_Linaria montana_, i. 307.

LINNAEUS, views of, as to the position of man, i. 190.

LINNET, numerical proportion of the sexes in the, i. 307; crimson forehead and breast of the, ii. 86; courtship of the, ii. 94.

_Linyphia_, i. 337.

LION, polygamous, i. 268; mane of the, defensive, ii. 266; roaring of the, ii. 275.

LIONS, stripes of young, ii. 183.

LIPS, piercing of the, by savages, ii. 341.

_Lithobius_, prehensile appendages of the female, i. 340.

_Lithosia_, coloration in, i. 396.

_Littorina littorea_, i. 324.

LIVINGSTONE, Dr., on the influence of dampness and dryness on the colour of the skin, i. 242; on the liability of negroes to tropical fevers after residence in a cold climate, i. 243; on the spur-winged goose, ii. 47; on weaver-birds, ii. 63; on an African nightjar, ii. 73, 97; on the battle-scars of South African male mammals, ii. 239; on the removal of the upper incisors by the Batokas, ii. 340; on the perforation of the upper lip by the Makalolo, ii. 342; on the Banyai, ii. 347.

LIVONIA, numerical proportion of male and female births in, i. 301.

LIZARDS, relative size of the sexes of, ii. 32; gular pouches of, ii. 33.

LLOYD, L., on the polygamy of the capercailzie and bustard, i. 269; on the numerical proportion of the sexes in the capercailzie and black-cock, i. 306; on the salmon, ii. 5; on the colours of the sea-scorpion, ii. 9; on the pugnacity of male grouse, ii. 45; on the capercailzie and black-cock, ii. 49, 54; on the call of the capercailzie, ii. 61; on assemblages of grouse and snipes, ii. 101; on the pairing of a shield-drake with a common duck, ii. 114; on the battles of seals, ii. 240; on the elk, ii. 249.

_Lobivanellus_, wing-spurs in, ii. 48.

Local influences, effect of, upon stature, i. 114.

LOCKWOOD, Mr., on the development of _Hippocampus_, i. 210.

LOCUST, bright-coloured, rejected by lizards and birds, i. 361.

LOCUST, migratory, i. 352.

LOCUSTIDAE, stridulation of the, i. 352, 354; descent of the, i. 356.

LONGICORN beetles, difference of the sexes of, in colour, i. 367; stridulation of, i. 380.

LONSDALE, Mr., on an example of personal attachment in _Helix pomatia_, i. 325.

LOPHOBRANCHII, marsupial receptacles of the male, ii. 21.

_Lophophorus_, habits of, ii. 121.

_Lophorina atra_, sexual difference in coloration of, ii. 226.

_Lophornis ornatus_, ii. 76.

LORD, J. K., on _Salmo lycaodon_, ii. 5.

LORY, King, ii. 174; immature plumage of the, ii. 188.

LOVE-ANTICS and dances of birds, ii. 68.

LOWNE, B. T., on _Musca vomitoria_, i. 145, 349.

_Loxia_, characters of young of, ii. 184.

LUBBOCK, Sir J., on the antiquity of man, i. 3; on the origin of man, i. 4; on the mental capacity of savages, i. 34; on the origin of implements, i. 52; on the simplification of languages, i. 62; on the absence of the idea of God among certain races of men, i. 65; on the origin of the belief in spiritual agencies, i. 66; on superstitions, i. 69; on the sense of duty, i. 71; on the practice of burying the old and sick among the Fijians,