SYLVIA. 
INDEX. 
TENTHREDINIDiE. 467 
Orioles breeding in immature plum- 
age, ii. 214, 215. 
Sylvia atricapiUa , young of, ii. 219. 
Sylvia cinerea , aerial love-dance of the 
male, ii. 68. 
Sympathy, i. 168; among animals, 
i. 77 ; its supposed basis, i. 82. 
Sympathies, gradual widening of, i. 
100 . 
Syngnathous fishes, abdominal pouch 
in male, i. 210. 
Sypheotides auritus , acuminated pri- 
maries of the male, ii. 64 ; ear-tufts 
of, ii. 73. 
T. 
Tabanid^e, habits of, i. 254. 
Tadorna varieguta, sexes and young 
of, ii. 206. 
Tadorna vulpanse.r , ii, 114, 
Tahitians, i. 183 ; compression of 
the nose by the, ii. 352. 
Tail, rudimentary, occurrence of, in 
man, i. 29 ; convoluted body in the 
extremity of the, i. 30 ; absence of, 
in man and the higher apes, i. 150, 
194; variability of, in species of 
Macacus and in baboons, i. 150; 
presence of, in the early progenitors 
of man, i. 206 ; length of, in phea- 
sants, ii. 156, 164, 166; difference 
of length of the, in the two sexes 
of birds, ii. 164. 
Tait, Lawson, on the effects of natu- 
ral selection on civilised nations, i. 
168. 
Tanager, scarlet, variation in the 
male, ii. 126. 
Tanagra sestiva , ii. 180 ; age of ma- 
ture plumage in, ii. 213. 
Tanagra rubra , ii. 126 ; young of, ii. 
220 . 
Tanais , absence of mouth in the males 
of some species of, i. 255 ; relations 
of the sexes in, i. 315; dimorphic 
males of a species of, i. 328. 
Tankerville, Earl, on the battles of 
wild bulls, ii. 240. 
Tanysiptera , races of, determined from 
adult males, ii. 190. 
Tanysiptera sylvia , long tail-feathers 
of, ii. 165. 
Taphroderes distortus, enlarged left 
mandible of the male, i. 344. 
Tapirs, longitudinal stripes of young, 
ii. 184, 303. 
Tarsi, dilatation of front, in male 
beetles, i. 343. 
Tarsius , i. 200. 
Tasmania, half-castes killed by the 
natives of, i. 220. 
Tattooing, i. 232 ; universality of, 
ii. 339. 
Taste, in the Quadrumana, ii. 296. 
Taylor, G. on Quiscalus major , i. 
307. 
Tea, fondness of monkeys for, i. 12. 
Tear-sacks, of Ruminants, ii. 280. 
Teebay, Mr., on changes of plumage 
in spangled Hamburgh fowls, i. 
281. 
Teeth, rudimentary incisor, in Rumi- 
nants, i. 17 ; posterior molar, in 
man, i. 25 ; wisdom, i. 26 ; diversity 
of, i. 108; canine, in the early pro- 
genitors of man, i. 206 ; canine, of 
male mammals, ii. 241 ; in man, 
reduced by correlation, ii. 325 ; 
staining of the, ii. 339 ; front, 
knocked out or filed by some sa- 
vages, ii. 340. 
Tbgetmeieji, Mr., on the abundance 
of male pigeons, i. 306; on the 
wattles of game-cocks, ii. 98; on 
the courtship of fowls, ii. 117 ; on 
dyed pigeons, ii. 118. 
Tembeta, ii. 341. 
Temper, in dogs and horses, inherited, 
i. 40. 
Tench, proportions of the sexes in the, 
i. 308, 309; brightness of male, 
during breeding season, ii. 13. 
TenBBRIONIDJS, stridulation of, i. 
379. 
Tennent, Sir J. E m on the tusko of 
the Ceylon Elephant, ii. 248, 258 ; 
on the frequent absence of heard in 
the natives of Ceylon, ii. 321 ; on 
the Chinese opinion of the aspect of 
the Cingalese, ii. 345. 
Tennyson, A., on the control of 
thought, i» 101. 
Tenthredinio®, proportions of the 
sexes in, i. 314 ; fighting habits of 
male, i. 364 ; difference of the sexes 
in, i. 365. 
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