1 .18 



OR GANIC E I r OL UTION 



America. The color and color pattern of the inedible 

 Danais archippus is imitated by the edible Basilarcha disip- 

 pus (Plate 76, A, B, C\ I have several times found these 

 two butterflies flying together, and the first time I captured 

 any of them I did not see until I reached home that I had 

 two species, instead of one as I thought. The edible form is 



slio-htlv smaller than the ill-flavored one, so that when once 

 <_> ^ 



distinguished they can again be recognized without diffi- 

 culty, but I much doubt if our insect-eating birds would 



detect the difference. 

 The inedible Hclico- 

 nidff of South and 

 Central America are 

 imitated by edible spe- 

 cies of other families 

 (Plate 77). One of the 

 most remarkable cases 

 of mimicry is that of 



* 



the imitation of three 

 different species of Da- 

 nais by three varieties of females in one species of Papilio 

 (Plate 76, D-J}. Plate 77, /-A", shows an instance of the 

 imitation of an inedible butterfly of the family Acraidce by 

 two edible butterflies of different families. 



Enplcca midamns, an inedible butterfly, is mimicked by 

 Calamcsia midama, a moth (Plate 84, C D, E, F}. The male 

 and female butterfly differ in color and in the pattern of 

 their markings, and it is interesting to see that the male 

 moth imitates the male butterfly and the female moth copies 

 the female butterfly. 



There are instances in which insects are supposed to be 



Fir,. 39. Spiders which mimic ants. 



a. Synageles picata. b. Syneinosyna formica. [From 

 G. W. and E. G. PECKHAM.] 



