428 



INDEX. 



SemnopiViecus chrmomelas, sexual dlffer- 

 encos of color in, 11. 277. 



Seiiiiiopif/ieciiJt comatus, ornamental hair 

 on the head oi; 11. 291. 



Semiiopithtcii« frotitatus, beard, etc., of, 

 ii. 2!U. 



."i-m/topithecio natiica, nose of, 1. 1S>4. 



Sfmiiopit/iecm nemxua, coloring of, ii. 

 296. 



Semnopiiliecun riihicxnrluft, ornamental 

 hair on tlio head of, ii. 291. 



Se.nses, infiTiority of Eurojieans to savages 

 intho, i. 114. 



Sentinels, i. 71, 79. 



Serpents, instinctively dreaded by apes 

 and monkeys. 1. 30, 41. 



Sirmnii.'i. horiimpliroditism in, J. 200. 



Sex, inhoritaiKT liiiiitt'il tiy. i. 273. 



Sexes, rcliilivo pnijiortions of, in man, 1. 

 291, ii. 3(!,") ; iiroliablc relation of the, in 

 primeval man, ii. 346. 



Sexual characters, secondary, i. 245; rela- 

 tions of polvgamy to, 1. 2r)9 ; transmitted 

 throuirli both sc.xcs, i. 270; gradation of; 

 in birds, ii. 129. 



Sexual and natural selection, contrasted, 

 i. 269. 



Sexual characters, effects of the loss of, i. 

 275; hniitation of. i. 275. 



Sexual dItVerenccs in man. i. 14. 



Sexual selection, expl.ination of, i. 24S, 

 252. 262 ; inllucncc of, on the coloring of 

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

 kind, ii. 3.V2. 



Sexual similarity, i. 263. 



Sharks, prehensile organs of male, ii. 1. 



SiiABi'E, K. 15., on Tain/Kiptera mj/via. ii. 

 157; on Ceri/le, ii. 165; on the young 

 male of Dact/o Gaudichaiuli, ii. ISO. 



SuAW, Mr., on tlie pugnacity of the male 

 salmon, ii. 3. 



Shaw, J., on the decorations of birds, 

 ii. CS. 



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 ])rop.>rtion of the sexes in, i. 295; 

 mode of tigliting of, ii. 28S ; arched fore- 

 heads of SDHic. ii. 271. 



Sheep, Merino, loss of horns in females of, 

 1. 275 ; horns o£ 1. 2S0. 



Shells, ditference in form of, in male and 

 female Gasteropoda, i. 315 ; beautiful 

 colors and shai)es of, i. 316. 

 SniELP-DRAKE, pairing with a common 

 duck, ii. 109 ; New Zealand, sexes and 

 young of, ii. 197. 

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

 mamage-custoinsof tlie Kaffros, ii. 357. 

 SnKEW-MicF, odor of. ii. 265. 

 Shrike, Drongo. ii. 171. 

 Shrike-S chai-.utcrs of young, ii. 177. 

 Shuckard, W. K., on sixual ililVcrences in 



the wings of llyincjioptenu i. •i^J4. 

 SHYNE.S8 of adorned male birds, ii. 93. 

 SifiOoniiim, proportions of the sexes in, i. 

 305 ; dimorphism in males of, i. 363. 



SlAM, proportion of male and female births 



in, i. 29.3. 

 Siamese, general beardlessness of the, 11. 



306; notions of beauty of the, ii. 829; 



hairy fainilv of, ii. 361. 

 Sir.uoLn, C. 'f., von, on the auditory ap 



Iiaratus of the stridulant orthoptera, 1. 



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



Signal-cries of monkeys, i. 5.5. 



SiLK-MDTH, ditference of size of the male 

 and female cocoons of the. i. 3:}6 ; pairing 

 of the, i. 3SS: male, fertilizing two or 

 three females, i. 393 ; proi)ortion of the 

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

 nestrini, on the destruction of its larvas 

 bv wasps, i. 302. 



Sim"iad,e, i. 187; their origin and di\Tslons. 

 i. 204. 



SiMiLABrrY. sexual i. 26S. 



Singing of the Cicada and FulgoridiB, 1 

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

 of the, ii. 50. 



Sirenia, nakedness of, i. 142. 



Sirex jurenctts, i. 354. 



SiRiciD.E, difference of the sexes in, 1. 354. 



Siskin, ii. 81 ; pauing with a canarj-, 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. 2-32. 



Skin and hair, correlation of color of; 1. 

 2;}9. 



Skull, variation of. in man. 1.104; cubic 

 contents of. no absolute test of intellect, 

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

 140; causes of inoditjcation ofthe, i. 141 ; 

 difference of, in form and capacity, in dif- 

 ferent races of men. i. 2oS ; variability of 

 the shape ofthe, i. 218; ditferences of; in 

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

 fications of the shape o£ ii. 324. _ 



Skunk, odor emitted by the, ii. 265. 



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

 u. 350. 



Slaves, differenice between those of field 

 and house, i. 357. 



S.MELL, sense of, in m.in and animals, 1. 23. 



Smith, Adam, on the basis of sympathy, 

 i. 7S. 



Smith, Sir A., on the recognition of women 

 by male Ci/tiocep/tali. i. 13; on an in- 

 sUince of memory in a baboon, i. 48; on 

 the retention of their color by the Dutch 

 in South .Vfrica, i. 233; on tlie polygamy 

 ofthe South African antelopes, i. 258; 

 on the proportion of the sexes in Kobua 

 el/ij/xijiri/i/iiiuM.i. 296; on Biicep/ialtia 

 aijieiiKin'.Vt. 2s; on South African lizartls, 

 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 

 beautv, ii. 829. 



Smith, i\, on the Cyniplda; and Tenthredl- 



