138 



Sumatra. 



very rare and beautiful insects. I will give here some account 

 of two species of butterflies, which, though very common in 

 collections, present us with peculiarities of the highest inter- 

 est. 



The first is the handsome Papilio raemnon, a splendid but- 

 terfly of a deep-black color, dotted over with lines and groups 

 of scales of a clear ashy blue. Its wings are five inches in 



DIFFERENT FEMALES OF PAPILIO MEMNON. 



expanse, and the hind wings are rounded, with scolloped 

 edges. This applies to the males; but the females are very 

 different, and vary so much that they were once supposed to 

 form several distinct species. They may be divided into two 

 groups — those which resemble the male in shape, and those 

 which differ entirely from him in the outline of the wings. 

 The first vary much in color, being often nearly white, with 

 dusky yellow and red markings, but such differences often oc- 



