INDEX. 765 



Monteiro, Mr., on the Bucorax abyssinicus, 435. 



Montes de Oca, M., on the pugnacity of male humming-birds, 408. 



Monticola cyanea, 519. 



Monuments, as traces of extinct tribes, 206. 



Moose, battles of, 571; horns of the, an incumberance, 587. 



Moral and instinctive impulses, alliance of, 125; faculties, their in- 

 fluence on natural selection in man, 144; rules, distinction between 

 the higher and lower, 138; sense, so-called, derived from the social 

 instincts, 136; origin of the, 140; tendencies, inheritance of, 140. 



Morality, supposed to be founded in selfishness, 135; test of, the 

 general warfare of the community, 137; gradual rise of, 141; in- 

 fluence of a high standard of, 149. 



Morgan, L. H., on the beaver, 75; on the reasoning powers of the 

 beaver, 84; on the forcible capture of wives, 163; on the castoreum 

 of the beaver, 604; marriage unknown in primeval times, 671; on 

 polyandry, 677. 



Morley, J., on the appreciation of praise and fear of blame, 163. 



Morris, F. 0., on hawks feeding an orphan nestling, 465. 



Morse, Dr., colors of mollusca, 298. 



Morselli, E., division of the malar bone, 44. 



Mortality, comparative, of female and male, 244, 275. 



Morton, on the number of species of man, 199. 



Moschkau, Dr. A., on a speaking starling, 96. 



Moschus moschiferus, odoriferous organs of, 605. 



MotacillcB, Indian, young of, 534. 



Moth, odoriferous, 349. 



Moths, 355; absence of mouth in some males, 235; apterous female, 

 235; male, prehensile use of the tarsi by, 237; male, attracted by 

 females, 284; sound produced by, 349; coloration of, 357; sexual dif- 

 ferences of color in, 358. 



Motmot, inheritance of mutilation of tail feathers, 67, 689; racket- 

 shaped feathers in the tail of a, 436. 



Moult, double, 526; double annual, in birds, 442. 



Moulting of birds, 551. 



Moults, partial, 444. 



Mouse, song of, 648. 



Mustache-monkey, colors of the, 614, 630. 



Mustaches, in monkeys, 171. 



Mud-turtle, long claws of the male, 397. 



Mulattoes, persistent fertility of, 194; immunity of, from yellow 

 fever, 220. 



Mule, sterility and strong vitality of the, 195. 



Mules, rational, 88. 



Muller, Ferd., on the Mexicans and Peruvians, 164; Fritz; on asto- 

 matous males of Taitais, 235; on the disappearance of spots and 

 stripes in adult mammals, 625; on the proportions of the sexes in 

 some Crustacea, 287 ; on secondary sexual characters in various 

 Crustaceans, 300, et seq.; musical contest between male Cicidce, 320; 

 mode of holding wings in Castina, 357; on birds showing a preference 

 for certain colors, 359; on the sexual maturity of young amphipod 

 Crustacea, 552. 



Miiller, Hermann, emergence of bees, from pupa, 242; pollen- 

 gathering of bees, 258; proportion of sexes in bees, 286; courting of 



