i. 115;

on the difficulty of distinguishing the native races of India, i. 215.

ELYTRA, of the females of _Dytiscus_, _Acilius_, _Hydroporus_, i. 343.

_Emberiza_, characters of young, ii. 184.

_Emberiza miliaria_, ii. 185.

_Emberiza schoeniculus_, ii. 111; head-feathers of the male, ii. 95.

EMBRYO of man, i. 14, 15; of the dog, i. 15.

EMBRYOS of mammals, resemblance of the, i. 32.

EMIGRATION, i. 172.

EMOTIONS experienced by the lower animals in common with man, i. 39; manifested by animals, i. 42.

EMPEROR moth, i. 398.

EMULATION of singing-birds, ii. 53.

EMU, sexes and incubation of, ii. 204.

ENDURANCE, estimation of, i. 95.

ENERGY, a characteristic of men, ii. 328.

ENGLAND, numerical proportion of male and female births in, i. 300.

ENGLEHEART, Mr., on the finding of new mates by starlings, ii. 106.

ENGLISH, success of, as colonists, i. 179.

ENGRAVERS, short-sighted, i. 118.

ENTOMOSTRACA, i. 332.

ENTOZOA, difference of colour between the males and females of some, i. 321.

EOCENE, possible divergence of man during the, i. 200.

EOLIDAE, colours of, produced by the biliary glands, i. 323.

_Epeira_, i. 337.

_Epeira nigra_, small size of the male of, i. 338.

EPHEMERAE, i. 341.

EPHEMERIDAE, i. 361.

EPHEMERINA, proportions of the sexes in, i. 314.

_Ephippiger vitium_, stridulating organs of, i. 354, 358.

_Epicalia_, sexual differences of colouring in the species of, i. 388.

_Equus hemionus_, winter change of, ii. 298.

_Erateina_, coloration of, i. 397.

ERECT attitude of man, i. 141, 142.

ESCHRICHT, on the development of hair in man, i. 24; on a lanuginous moustache in a female foetus, i. 25; on the want of definition between the scalp and the forehead in some children, i. 192; on the arrangement of the hair in the human foetus, i. 193; on the hairiness of the face in the human foetus of both sexes, ii. 379, 380.

_Esmeralda_, difference of colour in the sexes of, i. 368.

_Esox lucius_, i. 308.

_Esox reticulatus_, ii. 14.

ESQUIMAUX, i. 157, 167; their belief in the inheritance of dexterity in seal-catching,