68 CLARK — NEW SPHINGIDAE [^V^l^VlP" 



Chlaenogramma corumbensis sp, nov. 



Al. ant. long., 9 , 56 mm. Al. ant. lat., 9 , 23 mm. Marg. ext., 9 , 30 mm. 



Habitat. — Corumba, Matto Grosso, western Brazil. One female in coll. 

 B. Preston Clark, received from Dr. O. Staudinger and A. Bang-Haas. 



The largest of the known Chlaenogrammas, and a beautiful form. 



Palpi white at base, with dark brown inner margin; dark brown at tips, 

 irrorated with white. Antennae white above, brown below. Wing fringes 

 brown at the veins, white between them. Head, thorax and abdomen 

 above, gray. Collar dark brown, lightly bordered with yellow anteriorly, 

 and tipped with white posteriorly. Two dark brown median spots at base 

 of abdomen above. Legs brown, irrorated with white, especially at the 

 joints. Abdomen below white, with four prominent median dark spots; 

 dark brown side patches, bordered with white, on every segment. 



Fore wing above: White irrorated with brown, the resultant color being 

 gray. Two dark brown spots on costal margin, 6 mm. and 12 mm. distant 

 from the base. A dark brown geminate antemedian line runs irregularly 

 from the costal margin, at a point one third the distance from base to wing 

 tip, to the inner margin, which it reaches at a point one third the distance 

 from base to hinder angle. This geminate line is heavier costally as it ap- 

 proaches the margin. An obscure white stigma at apex of the cell. Two 

 brown postmedian parallel lines, distant from one another 3 mm., enclose 

 between them a darker area, making an irregular band extending from a 

 point slightly more than half-way from the base to the wing apex, to the 

 inner margin, which it reaches two thirds the distance from the base to 

 the hinder angle. Across this band the two dark streaks, so characteris- 

 tic of allied forms, extend between R2 and Ml, and between Ml and M2, 

 and parallel to them, the first being 10 mm. in length, the second 13 mm. 

 A series of sagittate marks between the veins makes a third irregular band, 

 extending from a point 13 mm. from the wing apex to the inner margin, 

 which it reaches close to the hinder angle. An apical line runs heavily and 

 irregularly to this third band, reaching it between SC5 and Rl. 



Hind wing above: Basal third dirty white, with dark basal spot, bor- 

 dered posteriorly by a narrow, brown, lunulate band ; the rest of wing gray, 

 with a broad, brown, irregular, submarginal band extending from inner 

 margin to anal angle, and narrowing posteriorly. In the gray postmedian 

 area is a brown line at anal angle, extending obliquely into the wing. 



Fore ^ving below: Basal half dark brown, with lighter area along costal 

 and inner margins; apical area gray; the line of separation between these 

 two areas sharply marked. A faint brown line extends parallel to the line 

 of separation, and 3 nam. distant from it. 



Hind wing below: Basal area dirty white. Antemedian band similar 

 in color to that on upper side of the wing. A faint postmedian Une runs 

 parallel to it and 3 mm. distant. Submarginal band follows the line of the 

 upper side of the wing, but is fainter. 



