?o LEPIDOPTERA. 



A genus of small butterflies, exceedingly rich in species, 

 and to be found in almost all the warm and temperate 

 regions of the earth. Nine species are known in this country, 

 and as some of them are very similar, a table of the species, 

 adapted, with Mr. Stainton's permission, from his admirable 

 Manual, will probably be useful : 



A. Under side of wings without red spots. 



B. Fore wings with several black spots on the upper 



side. P. Arion. 

 BB. Fore wings unspotted on the upper side. 



C. Under side pale blue. P. Argiulus. 

 CC. Under side slate-grey. 



D. Black spots on under side, with indistinct whitish 



margins. P, Alsus. 



DD. Black spots on under side, with distinct whitish mar- 

 gins. P. Ads. 



AA. Under side of hind wings with red spots at the hind 

 margin. 



E. Under side of fore wings with two black spots before 



the middle. 



F. Whitish cilia interrupted with dark fuscous. 



G. Male, pale blue, spots of the under side rather large. 



P. Cor yd on. 

 GG. Male brilliant blue, spots of under side smaller. 



P. Adonis. 

 FF. Whitish cilia free from dark fuscous on the outer 



edge. P. Alexis. 

 EE. Under side of fore wings with no black spots before 



the middle. 

 H. Under side of hind wings with bluish metallic spots 



near the hind margin. Male blue. P. j^gon. 

 HH. These metallic spots absent. Both sexes bro\vij. 



P. agestis. 



1. P. iEgon, ia'chiff. — Expanse of wings, 1 to 1^ inch. 

 Male, blue with dark margin ; female, brown. Marginal row 



