PAPILIONID.^. 



309 



liead, have a convex l)reast and a liunip on tlie thorax. Many of 

 them are o-reen in cokir. 



Colias pbilodice. Male. 



Onr best known species of tliis genus is Oolias philodice, an 

 insect which ranges over the whole of our countr}' east of the Rocky 

 Mountains. It is common in sunnner in almost every field, and 

 may be seen by dozens quietly resting with wings erect, sucking 



Colias pbilodice. Female. 



the moisture from the muddy pools in the roads. A good man}' 

 varieties occur, and one may find many albinos and also dark rich 

 specimens if the trouble be taken to search for tliem. The caterpillar 

 feeds on tlie clover. It is grass green and striped with light green. 



