GURELCA. 335 



hairs black. '2nd instar. Hairs on body very short ; head 

 green ; body bluish-green dotted with white ; a pale brown 

 dorsal stripe and a whitish subdorsal stripe from segment 2 

 to base of horn ; very pale brown oblique stripes ; horn black ; 

 spiracles black ringed with white. 3rd instar. Horn of medium 

 length ; oblique stripes white ; horn black with base purple. 

 4th instar. Head green dotted with paler green ; a yellowish 

 stripe separating face from cheek ; dorsum of body dark green, 

 lateral area paler green ; a transverse row of small white 

 tubercles along each division of each segment ; a broad white 

 subdorsal stripe from segment 2 to base of horn ; seven 

 whitish oblique stripes ; horn straight, of medium length, 

 basal half purple, distal half white with a black tip, the whole 

 covered with black tubercles ; spiracles black ; in some 

 individuals there are irregular purplish -brown spots above the 

 oblique stripes. 



5th instar. Horn of medium length, thick at base, tapering 

 abruptly to a sharp point, straight or curved slightly upwards 

 and held nearly vertical. Surface dull and smooth except for 

 the horn, which is covered with small tubercles. 



Colour variable ; in the green form head dark green dotted 

 with white ; a yellowish stripe, edged sometimes with pale 

 brown, separating face from cheek. Body pale green in dorsal 

 area, bright apple-green in lateral area ; a transverse row of 

 pale yellow dots along each secondary ring ; a whitish, sharply 

 defined subdorsal stripe on segments 2 to 6 ; seven sharply 

 defined, white oblique stripes, that on 5 narrower than the 

 rest, all edged above with irregular -shaped brown patches 

 variable in size ; irregular markings of dark brown on dorsum. 

 Horn : basal half brown above, reddish below, distal half 

 dirty yellow with black tip, the tubercles black ; legs pale red ; 

 prolegs, claspers and venter brown. Spiracles black, the 

 dumbbell -shaped central slit white. 



In the dark- coloured form (PI. X, fig. 7) the whole of the 

 green areas are brown, and there are other forms interme- 

 diate between the green and the dark- coloured forms. Length 

 50 mm. ; breadth 8 mm. ; horn 5 mm. 



Pupa. — Cremaster elongate- conical, ending in a simply 

 pointed shaft. Head, thorax and wing-case very pale ochreous, 

 dorsum spotted with dark brown, the lateral and ventral 

 surfaces closely, transversely barred with dark brown ; abdo- 

 men ochreous ; a broad black transverse band on the hind 

 edge of each segment running right round the body ; broken 

 dark brown transverse bars in the dorsal area turning to dots 

 in the lateral and ventral areas ; spiracles and cremaster 

 black. Length 25 mm. ; breadth 8 mm. 



Habits. — Food-plant : Leptodermis lanceolata Wall., family 

 Rubiaceae. 



