ii. 59;

structure of the, in Rhynchaea, ii. 203.

TRADES, affecting the form of the skull, i. 147.

_Tragelaphus_, sexual differences of colour in, ii. 288.

_Tragelaphus scriptus_, dorsal crest of, ii. 282; markings of, ii. 299, 300.

TRAGOPAN, i. 270; swelling of the wattles of the male, during courtship, ii. 72; display of plumage by the male, ii. 91; markings of the sexes of the, ii. 134.

_Tragops dispar_, sexual difference in the colour of, ii. 30.

TRAINING, effect of, on the mental difference between the sexes of man, ii. 329.

TRANSFER of male characters to female birds, ii. 193.

TRANSMISSION, equal, of ornamental characters, to both sexes in mammals, ii. 297.

TRAPS, avoidance of, by animals, i. 49; use of, i. 137.

TREACHERY, to comrades, avoidance of, by savages, i. 88.

_Tremex columbae_, i. 365.

TRIBES, extinct, i. 160; extinction of, i. 236.

_Trichius_, difference of colour in the sexes of a species of, i. 368.

TRIMEN, R., on the proportion of the sexes in South African butterflies, i. 310; on the attraction of males by the female of _Lasiocampa quercus_,