HERSE. 63 



Larva : — 



1st instar. Head small, body long and thin, horn straight, 

 of medium length, tip bifid ; head and body green, horn 

 black. 2nd instar. Little change. 3rd instar. Head small ; 

 body increasing gradually in diameter from segment 2 to 8, 

 then nearly cylindrical ; horn nearly vertical, thick at base 

 and tapering evenly to a sharp point ; surface of head and body 

 smooth and shining. Two colour-forms ; in the green form 

 head and body green dotted with white, with seven narrow 

 oblique stripes, whitish, edged above with dark green ; horn 

 green with the base brown ; in the dark-coloured form (PI. IX, 

 fig. 1) the head brown with a yellow cheek-stripe ; body 

 brown dotted with yellow, and a broad yellow subdorsal 

 stripe from segment 2 to base of horn ; a narrow, waved, 

 yellow subspiracular stripe from segment 2 to 12 ; horn brown 

 with a red stripe on each side. 4&h instar. Little change ; 

 the dark-coloured form is very variable in colour and markings, 

 one variety being figured (PI. IX, fig. 2). 



5th instar. Head round, dorsal line of vertex slightly 

 depressed ; segment 2 of greater diameter than head, the 

 segments increasing in diameter gradually to 7, rest of body 

 nearly cylindrical ; horn of medium length, sharply down- 

 curved, stout at base and tapering evenly to a sharp point. 

 Surface of head and body smooth and slightly shining, of the 

 horn smooth and polished. 



Colour very variable, the form figured in PI. IX, fig. 4, being 

 the most common. In this the head pale yellow with a narrow 

 black dorsal stripe dividing at the apex of the clypeus and 

 running down each side of it ; a broad black subdorsal stripe 

 and a still broader dorso-lateral black stripe separating face 

 from cheek, but not reaching vertex or base of antenna ; 

 labrum and ligula dark brown ; antenna soiled whitish ; 

 mandible and eyes black. Dorsum of body smoky- brown, 

 with short black lines across the secondary rings ; a broad, 

 clearly defined, yellow subdorsal stripe from 2 to 5, crossed 

 by a black line at the margins of the secondary rings, and 

 continued as a broken stripe on the anterior half of segments 6 

 to 11 ; a broad, pale yellow subspiracular stripe, widening 

 upwards to embrace the spiracles on segments 5 to 12, and 

 sharply defined above by the seven black oblique stripes. 

 Horn black ; legs, prolegs, claspers and venter smoky- 

 brown. Spiracles large, oval, flush, black in colour and lying- 

 in a round black patch. 



In the green form (PI. IX, fig. 6) the head grass-green, with 

 a broad pale yellow stripe separating face from cheek ; body 

 grass -green, the oblique stripes pale yellow edged above with 

 violet ; horn orange with a black tip ; legs, prolegs and 

 claspers green. Spiracles orange -red, edged narrowly with 

 dark green. Length 95 mm. ; breadth 14 mm. ; height 

 of head 5 mm. : horn 9 mm. 



