30O LEPIDOPTERA. 



Hanbury has this elongated blotch further extended, and 

 fused with a portion of the band of spots which lies beyond 

 the middle, so that a large, handsome orange blotch occupies 

 the middle of the fore wings ; the under side is only affected 

 so far as in the removal of one of the blackish spots. In 

 the hind wings it is not unusual to find the markings near 

 the margin almost or completely obsolete, leaving only two 

 or three central spots ; and every intermediate degree of 

 partial obliteration occurs. Mr. T. H. Briggs has a speci- 

 men, captured by himself at Baruewell Wold, in which the 

 fore wings are dark brown, and totally spotless. 



On the wing at the end of May and through June. 



Lakva seven-eighths of an inch in length ; pale creamy 

 white ; dorsal line pale reddish brown ; subdorsal line yel- 

 lowish, edged on each side with reddish brown ; spiracular 

 line of the same colour ; the spiracles small, brown, and 

 distinct ; head slightly tinged with blackish ; mouth dark 

 brown. (Hellins.) 



On first emerging from the egg the young larva has a 

 leather large head, but is otherwise cylindrical ; of a velvety 

 white, with the head shining black, and a black linear plate 

 on the second segment ; but as soon as it begins to feed the 

 colour becomes, gradually, a faint bluish green. In the 

 course of a fortnight it has become whitish green, with a 

 bluish green dorsal line, and a faint whitish subdorsal line ; 

 head and dorsal plate still brilliantly black and shining. 

 When a quarter of an inch long (and nearly two months 

 old), it is of a delicate light bluish green ; dorsal line slightly 

 darker, but edged with whitish ; subdorsal line darker 

 green, broadly edged with whitish below ; head black, and 

 has become rough ; dorsal plate now divided, and a rough 

 anal plate has appeared. At the next moult, immediately 

 after, the head becomes dark green, with black markings on 

 the crown, down each lobe, and on each side of the face ; the 

 dorsal plate further subdivided into five sjDots ; and the body 



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