OXYAMBULYX. 101) 



to the hinder angle, where it is 14 mm. in width. Within this 

 area, between M 2 and SM 2 and extending somewhat beyond 

 M 2 , is a black area which lacks the fine white lines basad of it 

 of C. panopus. 



Hind wing above light yellow with very dark brown 

 markings much as in panopus. Beneath light yellow with 

 dark markings which roughly duplicate those above. 



Hob. Sikkim. Besides the type in the Preston Clark 

 collection in the Carnegie Museum, Pittsburg, Pa., there is 

 a second specimen in the British Museum from Kurseong in 

 Sikkim (R. P. Andrews). The Q is unknown. 



This insect much resembles panopus, except for the yellow 

 palpi and the yellow colouring of the hind wing above. 



The figure is from the specimen in the British Museum. 



Genus OXYAMBULYX Rothschild & Jordan. (Figs. 21-23). 



Roths. & Jord., 1903, p. 192; id., 1907, p. 43; Jordan, 1911, 

 p. 238. 



Genotype : substrigilis (Westw.). 



Imago. — <$Q. Body and fore wing ashy-grey, clay-colour 

 or terra-cotta, hind wing yellowish, underside yellow, deep 

 chrome, tawny or terra-cotta. "... end-segment of antenna 

 compressed, bottle-shaped or conical in side-view, variable in 

 length, but at least four times as long as the preceding one, 

 which is longer than high, two bristles at end and several others 

 on the lateral and ventral surface : dorsal surface of segment 

 covered with appressed scaling. Head with a sharp inter- 

 antennal crest. Spurs unequal, short ones more than half the 

 length of the long ones, longer apical one of hind tibia more 

 than half the length of the first tarsal segment. Apex of fore 

 wing acuminate, not excised ; R 2 of hind wing in or below 

 centre of cell, D 3 as long as or longer than D 4 . Scales at 

 lateral edge of eighth tergite in $ prolonged to a triangular 

 crest" (Roths. & Jord., I. c. 1903). 



Egg. — Short or elongate ovoid, green or yellow in colour. 

 Rather small for the size of the moths, excepting that of 

 ocellata, which is very large. 



Larva. — Head triangular after first instar, but never with 

 long processes, higher than segment 2. Ligula very strongly 

 developed, being three times as long as labrum instead of 

 about equal in length to it, as in most sphingid larva?, and 

 hiding the mandibles from a front view. Body rather slender, 

 muscular and firm to the touch ; it increases in diameter 

 from segment 2 to 8, and then decreases slightly to 12 ; horn 

 long, straight or only slightly curved up or down ; tubercles 

 prominent in the earlier instars, less so in the last instar, 

 where they are rounded, seldom pointed, and most con- 

 spicuous on the body-stripes ; colour green, individuals having 



