426 



INDEX. 



Ring -ouzel, colors and nidification of the, 

 ii. 162. 



Ripa, Father, on the difficulty of distin- 

 guishing- the races of the -Chinese, i. 20T. 



Rivalry, in singing, between male birds, 

 ii.50. 



River-hog, African, tusks and knobs of 

 the, ii. 254. 



Rivers, analogy of, to islands, i. 196. 



Roach, brightness of male during breeding- 

 season, ii. 13. 



Robbery, of strangers, considered honor- 

 able, i. 90. 



Robertson, Mr., remarks on the develop- 

 ment of the horns in the roebuck and 

 red-deer, i. 279. 



Robin, pugnacity of the male, ii. 3S; au- 

 tumn song of the, ii. 51 ; female, singing 

 of the, ii. 51; attacking other birds, with 

 red in their plumage, ii. 106 ; young of 

 the, ii. 199. 



Robinet, on the difference of size of the 

 male and female cocoons of the silk- 

 moth, i. 335. 



Rodents, uterus in the, i. US; absence of 

 secondary sexual characters in, i. 259; 

 sexual diiferenpes in the colors of, ii. 272. 



Roe, winter change of the, ii. 284. 



Rolle, F., on the origin of man, i. 4 ; on a 

 change in German families settled in 

 Georgia, i. 237. 



Roller, ii. 53. 



Romans, ancient, gladiatorial exhibitions of 

 the, i. 97. 



Rook, voice of the, ii. 58. 



Rossler, Dr., on the resemblance of the 

 lower surface of butterflies to the bark of 

 trees, i. 380. 



Rostrum, sexual difference in the length 

 of, in some weevils, i. 247. 



Rudimentary organs, i. 17; origin of, i. 

 81. 



Rudiments, presence of, in languages, i. 

 58. 



Rudolpiti, on the want of connection be- 

 tween climate and the color of the skin, 

 i. 232. 



Ruff, supposed to be polygamous, i. 261 ; 

 proportion of the sexes in the, i. 297; 

 pugnacity of the, ii. 39, 44 ; double 

 moult in, ii. 78, 80 ; duration of dances of, 

 ii. 96; attraction of the, to bright objects, 

 ii. 107. 



Ruminants, male, disappearance of canine 

 teeth in, i. 139; ii. 311 ; generally polyg- 

 amous, i. 258; analogy of Lamellicorn 

 beetles to, i. 362; suborbital pits of, ii. 

 267; sexual differences of color in, ii. 

 274. 



ctwpicola crocea, display of plumage by 

 the male, ii. 88. 



Ruppell, on canine teeth in deer and an- 

 telopes, ii. 246. 



Russia, numerical proportion of male and 

 female births in, i. 291. 



Ruticilla, ii. 172. 



Rutlmeyer, P-of., on the sexual differences 

 of monkeys, ii. 308. 



Rutlandshire, numerical proportion oi 

 male and femalo births in, i. 291. 



S. 



Sachs, Prof., on the behavior of the male 

 and female elements in fertilization, i. 

 265. 



Sacrifices, Human, i. 175. 



Sagittal crest in male apes and Austra- 

 lians, ii. 304. 



Sahara, birds of the, ii. 164; animal in- 

 habitants of the, ii. 214. 



Sailors, growth of, delayed by conditions 

 of life, i. 110; long-sighted, i. 113. 



Sailors and soldiers, difference in the pro- 

 portions of, i. 112. 



St. John, Mr., on the attachment of mated 

 birds, ii. 104. 



St. Kilda, beards of the inhabitants ofjni. 

 306. 



Salmo eriox, and S. iimMa, coloring of the 

 male, during the breeding-season, ii. 14. 



/Salmo li/caodon, ii. 4. 



Salmo salar, ii. 4. 



Salmon, leaping out of fresh water, i. 80 ; 

 male, ready to breed before the female, 

 i. 252 ; proportion of the sexes in, i. 299 ; 

 male, pugnacity of the, ii. 3 ; male, char- 

 acters of, during the breeding-season, ii. 

 3, 14; spawning of the, ii. 18; breeding 

 of immature male, ii. 206. 



Salvin, O., on the Humming-birds, i. 260 ; 

 ii. 161 ; on the numerical proportion of 

 the sexes in Humining-birds, i. 298, ii. 

 212; on Chamaipetes and Penelope, ii. 

 61 ; on Selasphorus platycercm, ii. 62 ; 

 on Pipra deliciosa, ii. 63 ; on Chasmo- 

 rhynchiis, ii. 76. 



Samoa Islands, beardlessness of the natives 

 of, ii. 307, 333. 



Sand-skipper, i. 323. 



Sandwich Islands, variation in the skulls 

 of the natives of the, i. 105; superiority 

 of the nobles in the, ii. 340. 



Sandwich Islanders, lice of, i. 211. 



San Giuliano, women of, ii. 34i. 



Santall recent rapid increase of the, i. 

 128 ; Mr. Hunter on the, i. 232. 



SapMrina, characters of the males of, i. 

 326. 



Sarkidiomis melanonotm, characters of 

 the young, ii. 177. 



Sars, O., on Pontoporeia offinis, i. 319. 



Satwmia carpini, attraction of males by 

 the female, i. 303. 



Satumia lo, difference of coloration in the 

 sexes of, i. 385. 



Satumiidce, coloration of the, i. 3S3, 385. 



Savage, Dr., on the fighting of the male 

 gorillas, ii. 309 ; on the habits of the go- 

 rilla, ii. 346. 



Savage and Wyman, on the polygamous 

 habits of the gorilla, i. 258. 



Savages, imitative faculties of, i. 55, 155* 

 causes of low morality of, i. 93 ; uniform 

 ity of, exaggerated, i. 107; long-sighted 



