ciiAP. viiL] CURIOUS BUTTERFLIES, 129 



rudiment of which is ever to l)e perceived in the males ar 

 in the ordinary form of females. These tailed females are 

 never of the dark and blu(>glossed tints which prevail in 

 the male and often occnr in the females of the same form, 

 but are invariably ornaniGntcd with stripes and patches of 

 %siiite or buff, occupyiDg the larger part of the surface of 

 the hind wings. This pecnliarily of coJonritig led me to 

 discover that this extraordinary female closely resembles 

 (when flying) another butterfly of the same ^enus but of a 

 different group (Papiho coon); and that we have here a 



case of mimicry similar to those so well illustrated and 

 explained by Mr. Bates.^ That the resemblance is not 

 accidental is sufficiently proved by the hict, tliat in the 

 North of India, where Papilio coon is replaced by an 

 allied form [Papilio Doubledayi) having red spots in place 

 of yellow, a closely -allied species or variety of Papilio 

 niemnon fP, androgeus), has the tailed female also red 

 spotted. The use and reason of this resenibiance appears 

 to be, that the butterfl-ies imitated belong to a section of 

 the genus Papilio which from some cause or other are not 

 attacked by birds, and by so closely resembling these in 

 form and colour the female of Memnon and its ally, also 



^ Trang. Linn, fikw, vol xnil p, 495 ; "Natnralist on the AraMonii,*' 

 poi i, p. 290 



K 



