1874.] mr. f. moore on new asiatic lepidoptera. 577 



Sphinges. 

 Pergesa dolichoides, Felder, MS. 



Female. Brownish fawn-colour. Fore wing with four oblique trans- 

 verse, straight, brown lines, with pale, glossy, chalybeate inner bor- 

 ders ; exterior border with a submarginal lunular line, with pale 

 inner border ; a brown discal spot between second and third lines, 

 and an indistinct lunular line between third and fourth. Hind 

 wing dark brown. Abdomen with a pale dorsal line. 



Exp. 3g inches. 



Hab. Sikkim. In Coll. Capt. Lang and F. Moore. 



Bombyces. 



Fam. Chalcosiid.e. 



Gen. nov. Atossa. 



Fore wing elongated, trigonate ; costa somewhat straight ; apex 

 produced ; exterior margin oblique and slightly convex ; hind mar- 

 gin straight. Hind wing with the costa extending beyond fore wing, 

 arched in middle ; apex produced to a pointed angle in the male ; 

 exterior and anal margins convex. Antennae short, minutely ser- 

 rated in female. Body slender, short. Palpi short, slender, not ex- 

 tending beyond the head, pilose ; proboscis moderate. Legs slender, 

 short, squamous ; hind tibiae with four rather short spurs. Fore wing 

 with four superior veins, the first arising from half the length of the 

 cell, second before the end of the cell and having two short branches 

 ascending from half its length, third starting from end of cell, fourth 

 proceeding from one third the length of the third ; a straight dis- 

 coidal vein from near inward angle of the discocellular vein ; three 

 inferior veins, first and second contiguous at end of cell. Hind 

 wing with two superior, a discoidal, and three inferior veins. 



Atossa nelcinna. (Plate LXVII. fig. 7.) 



Male and female. Upperside greenish fuliginous ; veins and a lon- 

 gitudinal streak in cell of fore wing black : fore wing with the inter- 

 spaces between the veins from base to disk greenish yellowish white ; 

 a transverse discal row of yellowish-white lunules, and a marginal 

 row of small spots : hind wing with yellowish-white spaces between 

 the veins at the base, a discal transverse row of conical spots and a 

 marginal row of quadrate spots, both series partly confluent at anal 

 angle. Underside paler and more greenish-tinged, markings as 

 above, but more confluent. Antennae and head black ; thorax and 

 abdomen black above, yellow beneath ; abdomen with narrow yellow 

 dorsal edges and two lateral rows of black spots. Legs black. 



Esp. 6* 2|, 2 3 inches. 



Hab. Gurhwal, N.W. Himalaya. In Coll. Capt. A. M. Lang 

 and F. Moore. 



Note. — Has very much the outward appearance of a species of 

 Pieris. According to Capt. Lang's "Notes," it is a day-flier, and 



