GURELCA. 337 



bifid, each arm ending in two points, each of which bears 

 a seta ; the basa] half of the horn straight and held normally 

 horizontal, the distal half strongly up-curved ; surface covered 

 with very regularly placed, small tubercles, each bearing 

 a long and strong seta. 



Colour of head very variable, green, yellow, grey or brown. 

 A dark brown stripe separating face from cheek. Body 

 equally variable in ground-colour ; a yellow dorso-lateral 

 stripe from segment 2 to base of horn, sharply defined above 

 by brown, very narrowly on 2 to 6, more broadly on remaining 

 segments ; 2 and 3 suffused with dark brown below this stripe, 

 and 4 with a smaller patch of dark brown not reaching the 

 subdorsal stripe ; the hind portion of 7 and most of 8 suffused 

 with dark brown below the dorso-lateral stripe and also above it 

 nearly to the dorsum, the stripe represented on 8 by a line of 

 yellow spots ; whitish oblique stripes, sharply defined on 

 5 to 7, wanting on 8 and less sharply defined on 9 to 11, all 

 stopping at the dorso-lateral stripe and edged above to a greater 

 or lesser extent by dark brown ; the dark brown colour may 

 spread on to the dorsum of 7 to 11 as a diamond- shaped mark 

 on each segment. Horn smoky-black, the tubercles black ; 

 legs flesh -colour ; prolegs, anal flap and claspers dark brown. 

 Spiracles white with a broad dark brown band across the 

 middle. Length 50 mm. ; breadth 7 mm. ; horn 18 mm. 



Pupa. — Stoutish in build ; head long, rounded in front ; 

 shoulders prominent ; antenna shorter than fore leg ; a well- 

 developed coxal piece. Surface shining ; head with vertex and 

 also thorax superficially, transversely, irregularly lined ; wing- 

 case smooth, abdomen smooth except for very superficial 

 transverse folds and pits ; very small erect hairs on frons and 

 around spiracles ; sculpturing on segment 4 consisting of a 

 small transverse subdorsal weal just behind the front margin ; 

 a small pit above and behind the spiracle of 6 ; the spiracles 

 of 9, 10 and 11 situated on the hind face of a ridge running 

 round the front margins of those segments, segment 9 with 

 small, irregular, ante-spiracular ridges. Spiracle of 2 covered 

 by a rounded lobe projecting from the front margin of 3, its 

 front edge raised ; remaining spiracles broadly oval, edges of 

 central slit raised ; cremaster short, conical, ending in a short, 

 stout, cylindrical shaft bearing about twelve very short- 

 stemmed anchor-shaped booklets. Colour ochreous ; head, 

 tongue, wing-case, legs, antenna and thorax with regular 

 transverse bars of leaden colour ; hind bevels of segments 

 8, 9 and 10 deep chestnut ; sculpturing on 4, pit on 6, 

 spiracles and shaft of cremaster black, with the spiracles 

 lying on black patches. Length 25 mm. ; breadth 8 mm. 



Habits. — Food-plant : Psederiafoetida Linn., family Rubiacese, 

 which is also the food-plant of hyas. The long horn is moved 

 freely in a vertical plane when the larva is Avalking. 



vol. v. z 



