296 SPHINGID^E. 



tawny than in s. sericeus and omissa ; marginal band of 

 fore wing widest at R 2 , this projection generally rounded or 

 sinuate. Expanse : <£$, 86-100 mm. 



(J. Harpe as in s. sericeus. Left process of penis-sheath 

 triangular. 



$. Vaginal plate (fig. 74 F) as in naga, orifice rather more 

 proximal, with a concave space in front surrounded by a fold. 



Hab. E. Himalayas, S. India and Ceylon, eastwards to 

 Malaya and the Philippines. We have bred it in S. India, 

 where larvae are very common during the monsoon, from sea- 

 level up to 2,500 feet elevation. 



Two forms, occurring together and apparently not specifically 

 distinct : — 



(a) A. socrates f. socrates. 



c?$. Oblique discal band of fore wing widened behind R 2 . 

 Subapical costal patch of fore wing below bright chestnut. 



(b) A. socrates f. cinerea. 



(£$• Oblique band of fore wing a little more distad at 

 costal margin than in f. socrates, not dilated distad behind 

 R 2 , therefore narrower and straighter ; disc of fore and 

 hind wing below less ferruginous-tawny, subapical costal patch 

 of fore wing shaded with olive, less bright than in f. socrates. 



Larva : — 



Final instar. Head round, small ; true clypeus about half 

 length of head, an equilateral triangle ; false clypeus forming 

 an arch over apex of true clypeus ; labrum half as long as 

 and about as broad as clypeus ; ligula about as long and 

 as broad as labrum, kidney-shaped ; eyes 1 to 4 in a slight 

 curve, equidistant ; 6 in line with 3 and 4 and slightly further 

 from 4 than 4 is from 3 ; 5 slightly further from 4 and 6 than 

 4 is from 6. Surface of head smooth except for sparse, 

 minute, bubble -like tubercles visible only under a lens ; 

 labrum longitudinally ridged. Body shaped as in others of 

 the genus. Horn of medium length, down -curved, nearly 

 cylindrical to near tip, where it suddenly narrows to a short 

 point. Surface of body dull and smooth. Horn shining, 

 covered with small, flattened, pear-shaped tubercles. 



Coloration. — Head glaucous -green, tubercles white ; labrum 

 green ; ligula base soiled whitish, lobes reddish-brown ; antenna 

 with basal segment bright yellowish-green, other segments 

 bright maroon ; mandible green with reddish-brown tip ; eyesl, 

 2 and 5 green, others dark brown. Body bright yellowish-green 

 with short dark green longitudinal stripes above the flange, 

 and the dorso-lateral stripe, bluish-green dotted closely with 

 white below it ; a dorso-lateral stripe from segment 2 to base of 

 horn, narrow and yellow on segments 2 to 5, broad and white 

 •on 6 to 12, the stripe edged narrowly above by plum-colour, 



