128 



INDEX. 



Semnopithecus c7irysomeIas, sexual differ- 

 ences of color in, ii. 277. 



Semnopithecus comatus, ornamental hair 

 on the head of, ii. 291. 



Semnopithecus frontatus, beaid. etc., of, 

 ii. 294. 



Semnopithecus nasica, nose of, i. 1S4. 



Semnopithecus nemceus, coloiing of, ii. 

 296. 



Semnopithecus rubicumlm,, ,rnamental 

 hair on the head of, ii. 291. 



Senses, inferiority of Europeans to savages 

 in the, i. 114. 



Sentinels, i. 71, 79. 



Serpents, instinctively dreaded by apes 

 and mcnkeys, i. 36, 41. 



Serranus, hermaphroditism in, i. 200. 



Sex, inheritance limited by, i. 273. 



Sexes, relative proportions of, in man, i. 

 291, ii. 305 ; probable relation of the, in 

 primeval man, ii. 346. 



Sexual characters, secondary, i. 245; rela- 

 tions of polygamy to, i. 259 ; transmitted 

 through both sexes, i. 270 ; gradation of, 

 in birds, ii. 129. 



Sexual and natural selection, contrasted, 

 i. 269. 



Sexual characters, effects of the loss of, i. 

 275 ; limitation of, i. 275. 



Sexual differences in man, i. 14. 



Sexual selection, explanation of, i. 243, 

 252, 262 ; influence of, on the coloring of 

 Lepidoptera, i. 390 ; action of, in man- 

 kind, ii. 352. 



Sexual similarity, i. 268. 



Sharks, prehensile organs of male, ii. 1. 



Suarpe, K. B., on Tanysiptera sylvia, ii. 

 157; on Ccryle, ii. 165; on the young 

 male of Dacelo Gaudichmidi, ii. ISO. 



Siiaw, Mr., on the pugnacity of the male 

 salmon, ii. 3. 



Shaw, J., on the decorations of buds, 

 ii. 68. 



Sheep, danger-signals of, i. 74; sexual dif- 

 ferences in the horns of, i. 274 ; horns of, 

 i. 2S0 ; ii. 235, 247 ; domestic, sexual dif- 

 ferences of, late developed, i. 2S3; nu- 

 merical proportion of the sexes in, i. 295; 

 mode of fighting of, ii. 23S ; arched fore- 

 heads of some, ii. 271. 



Sheep, Merino, loss of horns in females of, 

 i. 275 ; horns of, i. 2S0. 



Shells, difference in form of, in male and 

 female Gasteropoda, i. 315 ; beautiful 

 colors and shapes of, i. 316. 



Shield-drake, pairing with a common 

 duck, ii. 109 ; New Zealand, sexes and 

 young of, ii. 197. 



Shooter, J., on the Kaffres, ii. 331 ; on the 

 marriage-customs of the Kaffres, ii. 357. 



Shrew-mice, odor of. ii. 265. 



Shrike, Drongo, ii. 171. 



SnRiKES, characters of young, ii. 177. 



Shuckard, W. E., on sexual differences in 

 the wings of Ilymenoptera, i. 334. 



Shyness of adorned male birds, ii. 93. 



Siac/onium, proportions of the sexes in, i. 

 305 ; dimorphism in males of, i. 363. 



Siam, proportion of male and fema e births 

 in, i. 293. 



Siamese, general beardlessness of the, ii. 

 306; notions of beauty of the, ii. 329; 

 hairy family of, ii. 361. 



Siebold, C. T., von, on the auditory ap 

 paratus of the stridulant orthoptera, i. 

 343. 



Sight, inheritance of long and short, i. 114. 



Signal-cries of monkeys, i. 55. 



Silk-moth, difference of size of the male 

 and female cocoons of the, i. 336 ; pairing 

 of the, i. 388; male, fertilizing two or 

 three females, i. 393 ; proportion of the 

 sexes in, i. 300, 302 ; Ailantus, Prof. Ca- 

 nestrini, on the destruction of its larvae 

 by wasps, i. 302. 



Simiad^e, i. 187; their origin and divisions, 

 ?. 204. 



Similarity, sexual, i. 268. 



Singing of the Cicadas and Fulgoridae, i 

 351 ; of tree-frogs, ii. 25 ; of birds, object 

 of the, ii. 50. 



Sirenia, nakedness of, i. 142. 



Sirex jwvencus, i. 354. 



Siricid^e, difference of the sexes in, i. 354. 



Siskin, ii. 81; pairing with a canary, ii. 

 110. 



Sitana, throat-pouch of the males of, ii 

 31, 35. 



Size, relative, of the sexes of insects, i. 335. 



Skin, movement of the, i. 19 ; nakedness 

 of, in man, i. 142 ; color of the,' i. 232. 



Skin and hah, correlation of color of, i. 

 239. 



Skull, variation of, in man, i. 104 ; cubic 

 contents of, no absolute test of intellect, 

 i. 140; Neanderthal, capacity of the, i. 

 140 ; causes of modification of the, i. 141 ; 

 difference of, in form and capacity, in dif- 

 ferent races of men, i. 20S ; variability of 

 the shape of the, i. 218; differences of, in 

 the sexes in man, ii. 302 ; artificial modi- 

 fications of the shape of, ii. 324. 



Skunk, odor emitted by the, ii. 265. 



Slavery, prevalence of, i. 90 ; of women, 

 ii. 350. 



Slaves, difference between those of field 

 and house, i. 287. 



Smell, sense of, in man and animals, i. 23. 



Smith, Adam, on the basis of sympathy, 

 i. 78. 



Smith, Sir A., on the recognition of women 

 by male Cynocephali, i. 13; on an in- 

 stance of memory in a baboon, i. 43 ; on 

 the retention of their color by the Dutch 

 in South Africa, i. 233; on the polygamy 

 of the South African antelopes, "i. 258; 

 on the proportion of the sexes in Kobus 

 ellipsiprymnus, i. 296; on Bucephalus 

 eapensis, ii. 2S; on South African lizards, 

 ii. 35; on fighting gnus, ii. 229; on the 

 horns of rhinoceroses, ii. 237; on the 

 fighting of lions, ii. 254 ■ on the colors of 

 the Cape Eland, ii. 274; on the colors of 

 the gnu, ii. 275; on Hottentot notions of 

 beauty, ii. 329. 



Smith, F., on the Cynipida and Tenthredr 



