2i6 LEPIDOPTERA. 



is absent the usual intermediate brown stripe often becomes 

 yellow-brown, and still serves to separate the areas of the 

 two bands. 



On the wing in May and June ; sometimes, in the extreme 

 south, at the end of April ; occasionally individuals of a 

 second generation appear in July. 



Larva, when full grown, an inch long, slender, uniform in 

 width when viewed from above, but when seen sideways 

 cylindrical in the middle segments, flatter towards the head 

 and tail ; skin smooth ; head round, green, faintly mottled 

 with brown ; body full velvety-green, undersurface rather 

 paler ; lines very indistinct, but the dorsal indicated as a 

 dark green thread bordered by paler lines, between which 

 and the spiracles are three pale subdorsal lines ; spiracles 

 yellowish ; beneath them is a broader pale line, which on 

 segments ten to thirteen becomes whitish ; segmental folds 

 yellow, usual dots very small, black, surrounded by light 

 rings and emitting small bristles ; legs twelve, the ventral 

 pairs being on segments nine and ten ; rudiments of another 

 pair too small for use on the eighth. (Rev. J. Hellins.) 



August and September on Pohjgala vulgaris (milk-wort). 

 When at rest, extended straight and flat on the stem of its 

 food ; if disturbed, it drops off and flings itself angrily about. 

 It walks in the arched manner characteristic of a semi-looper. 



Pupa c}dindrical, the wing-covers of unusual proportionate 

 length, and the general width of the body remarkably even ; 

 eye-covers a little prominent, but with the wing and limb- 

 covers, smooth and almost devoid of sculpture ; dorsal seg- 

 ments deeply divided and sharply ridged on each side with 

 a projecting rim ; abdominal segments smooth and without 

 pitting, but the hinder edge of each raised into a sharp 

 rim, and the anal segment tapering very suddenly to a blunt 

 flattened cremaster which is bent back and furnished with 

 two very short points. In a small tough silken cocoon on the 

 ground. 



