68 sphingidjE. 



Larger and much darker than styx ; the segmental bands and 

 grey stripe occupying so much of the abdomen that only small 

 patches of yellow are left. Hind wing with a large black patch 

 at the base ; the medial and postmedial bands so broad that only 

 narrow bands of yellow remain. Underside of abdomen banded 

 with black ; and the wings banded with black and with a spot in 

 the cell of each. 



Larva differs from styx in having blue streaks above the yellow 

 ones ; before pupating it turns brown and the oblique streaks 

 disappear. 



Hob. Throughout India and Ceylon ; Siam ; Penang ; Java ; 

 China. Exp. 92-134 millim. 



Subfamily SMERINTHINtE. 



Larva rugose, tapering to the head, which is more or less produced 

 to a point above ; horn straight. 



Imago with the proboscis very short and thin ; head projecting 

 but slightly forward. 



Fig. 41. — Larva of Polyptyclms dyras. (From Moore, Lep. Ceyl. pi. 78.) 



Key to the Genera. 



a. Fore wing with outer margin crenulate or 



angled. 

 a'. The apex acute. 



a 2 . Palpi rounded 1. Polyptychic, p. 68. 



b 2 . Palpi thin and flattened 2. Cypa, p. 71. 



b' . Fore wing with apex rounded, spatulate 

 scales on thorax and abdomen ; $ with 

 claspers highly developed . 4. Langia, p. 73. 



b. Fore wing with outer margin evenly 



rounded. 



a. Apex acute ; spurs long 5. Letjcophtjtcbia, p. 74. 



b'. Apex truncate ; spurs short, one pair on 



hind tibia 3. Daphnusa, p. 72. 



Genus POLYPTYCHIC. 



Polyptychic, Hilbn. Vei-z. p. 141 (1818). 

 Marumba, Moore, Lep. Ceyl. ii. p. 8 (1882). 



Type, P. dentatus, Cram. 



