12 PROCEEDINGS OF THE ACADEMY OF [Feb., 



noticed and a little in the intensity of fine blackish maculations on 

 the dorsum, a few specimens being almost free from the latter while 

 others have a '^salt and pepper" effect. 



Hyalopteryx asinus n. sp. 



Types: c^ and 9 ; Sao Paulo, Sao Paulo (c?), Jundiahy, Sao Paulo 

 ( 9 ), Brazil. September 14, 1900 (c?), February 24, 1899 ( 9 ). (Hem- 

 pel [d^l Schrottky [ ? ].) [Acad. Nat. Sci. Phila.] 



Allied to H. rufipennis Charpentier, but differing in the larger size 

 and slenderer limbs in both sexes, and in the male in the bullate meta- 

 zona, the broader, more acute tegmina, the elongate internal genic- 

 ular processes of the caudal femora and the extremely elongate sub- 

 genital plate. The Bolivian H. exaggerata Burr is a close ally as 



Fig. 1. — Hyalopteryx asinus n. sp. Lateral view of male type. (X 2.) 



shown by the genicular structures mentioned in the brief original 

 description, but it can be separated by the yellow anal field of the 

 wings and by inference by other characters, as the author says : " In 

 venation and structure, this form resembles H. rufipennis. ' ' 



Size rather large ; form elongate, very distinctly compressed, greatly so 

 in the male ; surface rugulose and covered with scattered whitish hairs, 

 both the character of the surface and the hairs being much more pro- 

 nounced in the male than the female. Head about equal to the pro- 

 notum in length in the male, distinctly shorter in the female, the 

 occiput much more ascendent in the male than in the female ; f astigium 

 projecting beyond the eyes a distance equal to the width at the cephalic 

 margin of the eyes, lateral margins parallel in the male, slightly con- 

 verging in the female, the apex with a rounded angle, lateral sections 

 more distinctly depressed and the short medial carina more apparent 

 in the female than in the male; face very strongly retreating in the 

 male, slightly less in the female; frontal costa narrow, moderately 



