406 



A CATALOGUE OF THE HETEROCERA OF SIKHIM AND 



BHUTAN. 



By G. C. Dudgeon, f.e.s. 



With Notes by H. J. Elwes, f.z.s., f.e.s., &c, 



and 



Additions by Sib Geobge F. Hampson, Babt., b.a., f.e.s., &c. 



Pabt II. 

 [Continued from page 251 of this Vol.) 



Family SPHINGID^J. 



Subfamily Achebontiinje. 



Genus Achebontia, Ochsen. 



88. A. styx, Westw. 

 Sikhim ; Bhutan, up to 6,000 feet, April to June. 



89. A. lachesis, Fabr. 



Sikhim and Bhutan, up to 5,000 feet, March, August and October. 

 The female from Sikhim and Bhutan has the lt skull-mark " pale buff, 

 and the postmedial line of the forewing distinctly white. The larva 

 feeds on tomato and potato plants, and some become brown in the last 

 mo alt, while others simply change to a yellow colour just before 

 pupating. 



" Subfamily Smebinthin^e. 



Genus Polyptichus, Hiibn. 



90. P. dentatus, Cram. 



Sikhim, 1,800 feet, August. I have only one specimen from this 

 locality which belongs to the variety timesius, 



91. P. dyras, Wlk. 



Sikhim and Bhutan up to 3,500 feet, May — August. Extremely 

 variable in the proximity of the two lines on either side of the disco- 

 cellular spot, which may meet just below the cell or be widely 

 separated as far as the inner margin. 



92. P. spectabilis) Butl. 



Sikhim. I have not seen this species. 



