1!% INDEX. 



Progenitors, early, of man, 182. 



Progress, not the normal rule in human society, 150; elements 

 of, 159. 



Prong-horn antelope, horns of, 265. 



Proportions, difference of, in distinct races, 190. 



Protective coloring in butterflies, 353; in lizards, 406; in birds, 

 539, 556; in mammals, 619; nature of the dull coloring of female 

 Lepidoptera, 363, 364, 367; resemblances in fishes, 390. 



Protozoa, absence of secondary sexual characters in, 294. 



Pruner-Bey, on the occurrence of the supra-condyloid foramen in 

 the humerus of man, 24; on the color of negro infants, 636. 



Prussia, numerical proportion of male and female births in, 275. 



Psocus, proportions of the sexes in, 287. 



Ptarmigan, monogamous, 248; summer and winter plumage of the, 

 443, 444; nuptial assemblages of, 460; triple moult of the, 526; pro- 

 tective coloration of, 540. 



Puff-birds, colors and nidification of the, 518. 



Pugnacity of fine-plumaged male birds, 454. 



Pumas, stripes of young, 528. 



Puppies learning from cats to clean their faces, 82. 



Pycnonotus hcemorrhous^ pugnacity of the male, 409; display of 

 under tail coverts by the male, 456. 



Pyranga (Estiva, male aiding in incubation, 515; male characters in 

 female of, 525. 



Pyrodes, difference of the sexes in color, 333. 



Quadrumana, hands of, 56; differences between man and the, 170; 

 sexual differences of color in, 612; ornamental characters of, 626; 

 analogy of sexual differences of, with those of man, 634; fighting of 

 males for the females, 641; monogamous habits of, 674; beards of 

 the, 688. 



Quain, R., on the variation of the muscles in man, 30. 



Quatrefages, A. de, on the occurrence of a rudimentary tail in man, 

 25; on variability, 33; on the moral sense as a distinction between 

 man and aninuls, 110; civilized men stronger than savages, 154; on 

 the fertility of Australian women with white men, 194 ; on the 

 Paulistas of Brazil, 197; on the evolution of the breeds of cattle, 

 201; on the Jews, 220; on the liability of negroes to tropical fevers 

 after residence in a cold climate, 221; on the difference between 

 field and house slaves, 223; on the influence of climate on color, 223; 

 colors of annelids, 299; on the Ainos, 639; on the women of San 

 Giuliano, 670. 



Quechua, see Quichua. 



Querquedula acuta, 471. 



Quetelet, proportion of sexes in man, 275; relative size in man and 

 woman, 276. 



Quichua Indians, 38; local variation of color in the, 223; no gray 

 hair among the, 637; hairlessness of the, 640; long hair of the, 662. 



Quiscalus major, 255; proportion of the sexes of, in Florida and 

 Honduras, 281. 



Rabbit, white tail of the, 619. 



Rabbits, domestic, elongation of the skull in, 63; modification of 

 the skull in, by the lopping of the ear, 63; danger-signals of, 114; 

 numerical proportion of the sexes in. 279. 



