72 LEPIDOPTERA. 



of these some have dashes of bright blue in the brown of the 

 female side. In one case the abdomen is furnished with the 

 genital organs of both sexes. These gynandrous specimens 

 are further remarkable in this respect — that the wings on the 

 female side are larger than those on the male, whereas in 

 perfect ordinary specimens the male is the larger insect. 

 Similar gynandrous specimens exist in the collection of 

 Mr. C. A. Briggs, as also a pale lilac male with no dark 

 margins, and a long series of dwarfs. In the collection of 

 the late Mr. Bond is a female tinged with blue on one side 

 only ; and I have one, taken in Pembrokeshire, which has a 

 streak of bright blue on the under side of one fore wing. 

 On the wing in July and August. 



Larva onisciform, rather thick ; head retractile, blackish ; 

 dorsal surface (except at the extremities) with raised promi- 

 nences on each side, and a hollow between them ; ventral 

 surface rather flattened, legs all placed well underneath. 

 When half-grown, of a deep yellowish-grey, with blackish- 

 olive dorsal stripe, edged with whitish ; triple sub-dorsal 

 stripe, consisting of two blackish-olive lines, with one of 

 whitish-grey between them ; a white spiracular line continued 

 round the anal segment ; whole surface generally studded 

 with minute blackisli points, each bearing a fine hair. When 

 full grown over half an inch in length, bright yellow-green ; 

 dorsal stripe blackish-brown edged with whitish, broadened, 

 and somewhat squared on the third, fourth, and eleventh seg- 

 ments ; subdorsal line still triple, having one greenish-yellow 

 line between two green ones ; spiracular line as before. Each 

 segment from the third to the tenth with a yellow-green 

 oblique line between the dorsal and subdorsal stripes. Anal 

 segment with two prominent warts. 



Extremely sluggish, feeding on the leaves of Ornithopus 

 perpU!iiUu» (bird's foot vetch), but during most of its life eat- 

 ing only one surface of the leaves. The eggs, which are laid 

 in July or August, remain in that state through the winter. 



