196 POPULAR ENTOMOLOGY. 



stripes or bands of silver, not spots as in the other species. 

 The caterpillar is light brown, with two dark lines on the 

 sides, and long hairy spines : it feeds on the raspberry and 

 violet. The insect is not uncommon. 



LEPIDOPTERA. 

 POLYOMMATUS. 



Generic Distinctions. See page 123. 



POLYOMMATUS ARGUS. Silver-studded Blue. Male, deep 

 blue above, inclining to lilac, with a broad band of black 

 round the hinder margin of all the wings ; the nervures are 

 also dark ; the under side is bluish-grey, becoming deeper 

 at the base, and adorned with many ocellated spots ; on the 

 hinder margin of the posterior wings there is a tawny orange 

 band, containing six bright silvery blue spots crowned with 

 a series of black crescents. The female is entirely brown 

 above, with a tawny marginal band. The caterpillar is dull 

 green, with a rusty line on the back, and oblique marks of 

 the same colour, edged with white, on the sides ; it feeds on 

 broom, trefoil, etc. The butterfly is common in the south. 



POLYOMMATUS SALMACIS. Durham Argus. This species 

 is silky-brown above, the anterior wings having a white 



