JUNE. 163 



tubercles, resembling ears ; it lives on the elin, willow, and 

 various trees and shrubs. The butterfly is not generally 

 common ; there is a second brood in September. 



LEPIDOPTERA. LYOENIDJE. 



POLYOMMATUS. 



Generic Distinctions. See page 123. 



POLYOMMATUS AGRESTIS, Brown Argus. This species 

 measures about an inch ; the colour is dark brown, with a 

 fine silky gloss, having a band of orange spots, and the 

 primary pair a small black spot in the centre ; the under 

 side is greyish-brown, with numerous ocellated spots, and a 

 band similar to that on the surface ; the hinder wings have 

 a white mark on the disc. It occurs in some abundance in 

 the southern counties, appearing again in August. 



LEPIDOPTERA. PAPILIONID.E. 



PIEBIS. 



Generic Distinctions. Antennae slender, the club formed gradually ; 

 palpi, two lower joints robust, the basal one twice the length of the 



M 2 



