88 MIMICRY, AND OTHER PROTECTIVE 



there by P. senomaus, the female of which so exactly 

 resembles it that they can hardly be separated in the 

 cabinet, and on the wing are quite undistinguishable. 

 But one of the most curious cases is the fine yellow- 

 spotted Papilio coon, which is unmistakeably imitated 

 by the female tailed form of Papilio memnon. These 

 are both from Sumatra ; but in North India P. coon 

 is replaced by another species, which has been named 

 P. doubledayi, having red spots instead of yellow ; 

 and in the same district the corresponding female 

 tailed form of Papilio androgeus, sometimes considered 

 a variety of P. memnon, is similarly red-spotted. Mr. 

 Westwood has described some curious day-flying moths 

 (Epicopeia) from North India, which have the form 

 and colour of Papilios of this section, and two of these 

 are very good imitations of Papilio polydorus and 

 Papilio varuna, also from North India. 



Almost all these cases of mimicry are from the 

 tropics, where the forms of life are more abundant, 

 and where insect development especially is of unchecked 

 luxuriance ; but there are also one or two instances in 

 temperate regions. In North America, the large and 

 handsome red and black butterfly Danais erippus is 

 very common ; and the same country is inhabited by 

 Limenitis archippus, which closely resembles the 

 Danais, while it differs entirely from every species of 

 its own genus. 



The only case of probable mimicry in our own coun- 

 try is the following : A very common white moth 

 CSpilosoma menthastri) was found by Mr. Staintoa 



