l6o THE BUTTERFLIES OF THE BRITISH ISLES. 



The caterpillar figured on Plate 104, when full grown, was 

 reddish-brown, finely dotted with white, and from each dot a 

 tiny hair arose ; the stripe on the back and line on the side 

 were black edged with white, head black and shining. This 

 caterpillar was found on the last day of May, crawling on the 

 ground under heather at Oxshott. It was then about half- 

 grown, and was reared on heather, pupated in due course, and 

 produced a female butterfly on July nth. 



The chrysalis, of which two figures are given, had a pale 

 brownish and rather shining head ; the body was brown with 

 a darker line on the back ; the thorax and wing-cases dull 

 yellowish-green, the former rather glossy. It was placed in an 

 angle formed by a side and the floor of the cage, lying quite 

 flat and secured by silken threads, which, owing to position, 

 I was unable to examine. Some of the caterpillars that Mr. 

 Frohawk reared were pale green with a dark purplish stripe on 

 the back. Another food-plant is bird's-foot vetch (Ornithopus 

 perpusillus). 



The butterfly is on the wing in July and August, and seems 

 to be more often found on sandy heaths than elsewhere. It 

 is especially common, in some years, in the heather-clad 

 districts of Surrey and Hampshire, as well as other counties in 

 England. In Norfolk and Suffolk it is said to be common, 

 but scarce in Gloucestershire and Somersetshire. Its range 

 extends through the greater part of England and Wales, and 

 into Scotland as far as Perthshire. Specimens from the north- 

 west coast of Wales are said to be larger than those from 

 inland localities. 



As regards Ireland, there is only Birchall's record, "The 

 Murrough of Wicklow, and near Rostrevor," in evidence of the 

 butterfly occurring in that country at all. 



Abroad, it appears to range pretty well over the whole of 

 Europe, and through Asia eastward to Siberia, Corea, and 

 Japan. 



