866 



INDEX 



SemnopitheciiB oomatna, ornamental 

 hair on the bead of, 709. 



— — froutatua, beard, etc., of, 710. 



— — nasica, nose of, 302. 



— — Bemeeus, coloring of, 711. 



— TubicanduB, ornamental hair on 

 the head of, 708. 



Senses, inferiority of Europeans to sav- 

 ages in the, 56. 



Sentinels, among animals, 138, 146. 



Serpents, instinctively dreaded by apes 

 and monkeys, 103. 



Serranus, hermaphroditism in, 216. 



Sex, inheritance limited by, 303. 



Sexes, relative proportions of, in man, 

 318-319; differences between, 717- 

 718; probable relation of the, in 

 primeval man, 760-761. 



Sexual characters, secondary, 274; re- 

 lations of polygamy to, 286; trans- 

 mitted through both aexes, 297 ; 

 gradation of, in birds, 664. 



and natural selection, contrasted, 



297-299. 



characters, effects of the loss of, 



304; limitation of, 304. 



— — differences in man, 28, . 



selection, explanation of, 276, 281, 



291 ; influence of, on the coloring of 

 lepidoptera, 415 ; objections to, 639 ; 

 manner of action with mankind, 765. 



similarity, 338. 



Shaler, Prof., sizes of sexes in whales, 

 666. 



Sharks, prehensile organs of male, 431. 



Sharpe, Dr., Europeans in the tropics, 

 259. 



— — , R. B., on Tanysiptera sylvia, 

 582; on Ceryle, 589; on the young 

 male of Dacelo Gaudichaudi, 602. 



Shaw, Mr., on the pugnacity of the 

 male salmon, 433. 



, J., on the decorations of birds, 

 495. 



Sheep, danger signals of, 138; sexual 

 differences in the horns of, 303 ; 

 horns of, 309, 652 ; domestic, sexual 

 differences of, late developed, 312; 

 ninnerical proportion of the sexes 

 in, 324; inheritance of horns by one 

 sex, 662; effect of castration, 654; 

 mode of fighting of, 656; arched 

 foreheads of some, 688. 



. Merino, loss of horns in females 

 of, 304; horns of 309. 



Sheila, diSerenoe in fonn of, in male 

 and female Chisteropoda, 347 ; beaa- 

 tifal colors and shapes of, 348-349. 



Shield-drake, pairing with a conunon 

 duck, 536; New Zealand, sexes and 

 young of, 618. 



Shooter, J., on the KafSrs, 746; on 

 the marriage-customs of the EafBrs, 

 770. 



Shrew-mice, odor of, 683. 



Shrike, Drongo, 594. 



Shrikes, characters of young, 599. 



Shuckard, W. B., on sexual differences 

 in the wings of Hymenoptera, 365. 



Shyness of adorned male birds, 520. 



Siagonium, proportions of the sexes in, 

 335 ; dimorphism in males of, 391. 



Siam, proportion of male and female 

 births in, 322. 



Siamese, general beardlessness of the, 

 721; notions of beauty of the, 744; 

 hairy family of, 774. 



Sidgwick, H., on morality in hypotheti- 

 ceJ bee community, 137 ; our actions 

 not entirely directed by pain and 

 pleasure, 163. 



Siebold, C. T. von, on the proportion 

 of sexes in the Apus, 337; on the 

 auditory apparatus of the stridulant 

 Orthoptera, 373. 



Sight, inheritance of long and short, 66. 



Signal cries of monkeys, 122. 



Silk-moth, proportion of the sexes in, 

 330-331 ; Ailanthus, Prof . Canestrini, 

 on the destruction of its larvae by 

 wasps, 332 ; difference of size of the 

 male and female cocoons of the, 366; 

 pairing of the, 415. 



Simiadee, 204; their origin and divi- 

 sions, 220-221. 



Similarity, sexual, 297-298. 



Singing of the Cicadae and Fulgoridse, 

 371; of tree-frogs, 466; of birds, 

 object of the, 478. 



Sirenia, nakedness of, 83. 



Sirex juvencus, 383. 



SiricidsB, difference of the sexes in, 383. 



Siskin, 508 ; pairing with a canary, 536. 



Sitana, throat-pouch of the males of, 

 460, 464. 



Size, relative, of the sexes of insects. 

 366. 



Skin, movement of the, 30-31 ; naked- 

 ness of, in man, 83-84; color of the^ 

 255. 



