CELERIO. 405 



subspecies in the localities mentioned, except Sabathu, at 

 elevations of from 8,000 to 9,000 feet. The larvae are extremely 

 local, but occur in very large numbers in a very restricted 

 area in July and August. The closely allied G. euphorbias 

 euphorbias is the Spurge Hawk-Moth of England. 



Egg. — Nearly spherical, surface shining and very minutely 

 pitted, colour pale green. 



Larva : — ■ 



1st in-star. Head and horn black, body dirty white. In 

 later instars head and body black dotted with white, and 

 white subdorsal spots on segments 3 to 12. 



Final instar. Head broadly semi-elliptical, dorsal line very 

 slightly depressed, the vertex of each lobe broadly rounded ; 

 true clypeus triangular, longer than broad, apex reaching to 

 nearly the middle of the head ; false clypeus with rounded 

 apex reaching to middle of head ; . labrum one-third length 

 of clypeus, as broad as clypeus is long, the sides converging 

 frontad ; ligula as long as labrum, twice as broad as long, 

 oblong in shape with a small frontal sinus ; cutting- edge of 

 mandible strongly toothed ; eyes 1 to 4 in a semicircle, 6 in 

 line with 3 and 4 ; 1 and 2, 3 and 4, and 4 and 5 equidistant ; 



2 and 3 closer together, 4 and 6 and 5 and 6 further apart 

 than the above ; all the eyes of equal size and rather 

 small. Surface of head moderately shining, smooth, covered 

 sparsely with short hairs directed frontad. Body moderately 

 shining, greasy-looking, a transverse row of short hairs along 

 each secondary ring ; a saddle-shaped mark on segment 2 

 slightly more shining ; distal two-thirds of anal flap and outer 

 face of base of clasper set sparsely with minute, conical 

 tubercles. Horn short, slightly down- curved, tapering evenly 

 to a blunt point, covered densely with spine-like, outward- 

 directed tubercles. 



Coloration. — Head black with black hairs ; labrum very pale 

 yellow ; ligula black ; basal segment of antenna pale yellow, 

 other segments dark chestnut with a pale yellow band between 

 them ; mandible dark chestnut ; eyes black. Body with 

 segment 2 black with a small, round, pale yellow subdorsal 

 spot on the front margin, and a similar subspiracular spot 

 sometimes present ; the saddle-mark black ; rest of body with 

 a broad black dorsal stripe from 3 to base of horn and thence 

 to tip of anal flap ; a longitudinally oval, pale yellow, sub- 

 dorsal spot on 3 to 12, these spots increasing in size from 



3 to 11, edged narrowly with black, the upper edges joined 

 across the dorsum by a broad black band ; the area between 

 the dorsal stripe and a narrow, black, subspiracular stripe 

 black, with a transverse row of pale yellow dots along each 

 secondary ring, these dots leaving the black as a fine reticula- 

 tion ; below the subspiracular stripe darker yellow with 



