\M\ITI\ i CO] OS \ i 



Recognition Markings. Thou re apparently impor 



animals and bin ,di\ iduab ,i" tin ;>ecies 



quickly i .nxl follow thct, 00 



this purpo-e arc known to occur amOl 



U9 migrant h as Anosin plr.vi />/>m and th- i 



Mountain locust. 



Epigamic Colors. Amon^ birds, frequently, the bright 

 the male arc displayed during courtship, and their evolution 

 attributed by Darwin and many of his followers to sexual M-!C< lion a 

 highly debatable subject. Among insects, however, no >uch phei. 

 non has been found; whenever the two sexes differ in coloration the 

 difference does not appear to facilitate the recognition of even one sex 

 by the other. 



Evolution of Adaptive Coloration. Natural selection is the only 

 theory of any consequence that explains the highly involved phenomena 

 ot adaptive coloration. Against such vague and unsupported theories 

 as the action of food, climate, laws of growth or sexual selection, natural 

 selection alone accounts for the multitudinous and intricate correlations 

 of color, pattern, form, attitude, movement, place, time, etc., that are 

 ^sary to the development of a perfect case of protective resemblance 

 or mimicry. Natural selection cannot, of course, originate colors or any 

 other characters, its action being restricted to the preservation and 

 accumulation of such advantageous variations as may arise, from what- 

 ever causes. As Poulton says, the vast body of facts, utterly meaning- 

 less under any other theory, become at once intelligible as they fall 

 harmoniously into place under the principle of natural selection, to 

 which, indeed, they yield the finest kind of support. 



