I.VC.^IXID.K. 49 



hind margin, and two white-edged black spots near 

 the anal angle ; hind wings with a broad marginal orange 

 band, edged internally and externally with black spots, each 

 of which is tipped with purplish-white. Extreme margin 

 blackish. 



Very constant in colour and markings, but in the male a 

 pale oblong spot is occasionally visible in the fore wings, as in 

 T. iv-alhum. In the collection of Mr. Sydney Webb is a 

 female aberration in which the usual band of oranse crescents 

 on the fore wings is shaded inwards, in long faint blotches, to 

 the middle of the wings. 



On the wing from the middle of June to the middle of 

 July. 



I can find no original description of the larva in anj'^ of 

 our works ; moreover, all those from Continental works differ. 

 Mr. Stainton says (from Dupouchel) : " Green, darker on the 

 back, tw'o rows of long yellow spots on the back, and a row 

 on each side above the legs; six long oblique yellow stripes 

 on each side." But Mr. Kirby says : " Larva green, with a 

 yellow head, a whitish line on the back and whitish oblique 

 lines." And Mr. Newman : " Pale green, the crest of the ridges 

 and a narrow lateral stripe yellow." He also states that the 

 egg is laid on a twig of blackthorn, and remains attached to 

 it all the winter. Mr. F. W. Hawes, writing from memory, 

 tells me that it feeds up rapidly in May, spinning up about 

 the first week of June. When full fed is decidedly onisci- 

 form, and when at vest very blunt at both extremities and 

 the back considerably raised in the centre, but from the 

 segments being joined together by an overlapping fold, it is 

 enabled to extend itself to a greater length than the allied 

 species. Head whitish, with two eye-spots ; the whole bodv 

 of a delicate rich velvety green, covered with short white 

 hairs, and having the dorsal ridge and some pairs of points 

 yellowish brown. Ventral surface and pro-legs pale whitish 

 green. (Remaining markings not distinctly remembered, but 

 there is some yellow about the spiracles.) Very soft to the 



D 



