. A manual of zoology. Zoology. 40 GENERAL PRINCirLES OF ZOOLOGY females, since these are less numerous and have heavier bodies than the males. So there arises a sexual dimorphism. If lire mimicing species have a wide distribution, ditferent bad flavored species may be mimicked in different parts of the range. The females of Papilio mcrops mimic, in different regions, Daiiais chrysippiis, Amaiiris cchcria and .1. mavias, wliile tlie males have the same appearance throughout the whole Fig. 14.—17, Myi^nimia aviculus, a wnsp imilatcil by a beetle, h, CoIi'hi>rlioiiibiis/ijsl'li- lip
. A manual of zoology. Zoology. 40 GENERAL PRINCirLES OF ZOOLOGY females, since these are less numerous and have heavier bodies than the males. So there arises a sexual dimorphism. If lire mimicing species have a wide distribution, ditferent bad flavored species may be mimicked in different parts of the range. The females of Papilio mcrops mimic, in different regions, Daiiais chrysippiis, Amaiiris cchcria and .1. mavias, wliile tlie males have the same appearance throughout the whole Fig. 14.—17, Myi^nimia aviculus, a wnsp imilatcil by a beetle, h, CoIi'hi>rlioiiibiis/ijsl'li- lipciiiiis (after Wallace). Three-fourths natural size. Sexual Selection is a special phase of natural selection, diiefly observed in birds and hoofed animals. For the fulfilment of liis instincts the male sSeks to drive his competitors from the field, eillier in battle or by impressing the female by liis charms. With strong \vings and with spurs the cock maintains possession of Ms flock, the stag by means of his antlers, tlae bull with his horns. The male birds of paradise win the favor of the females by means of beautiful coloring; most singingdjirds, by means of song; many species of fowl, by peculiar love-dances. Since all these characters belong chiefly to the male, and since only exception- ally are they inherited by the female (and even then arc less pronounced),. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929, ed. and tr. New York, H. Holt
Size: 1192px × 2097px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
