180 Annals of the Carnegie Museum. 



or brownish spot or stripe on each side; 10 obscure, with a blue? 

 dorsal spot and a brown lateral mark. 



Hind margin of 10 excised mid-dorsally one-fourth way toward 

 base, margins of excision elevated, forming a process the tip of which 

 in rear view is truncated. 



Superior appendages in dorsal view about two-thirds as long as 10, 

 black, inner surface pale, narrowing from base to apex, which lies at 

 the outer edge of the appendage, so that while the outer edges of the 

 two appendages are subparallel, their inner edges are decidedly diverg- 

 ing from the supero-internal basal process of each, which approaches, 

 but is not applied against, its fellow of the opposite side ; in profile 

 view each superior appendage is directed downward as well as caudad, 

 and is of uniform thickness in its proximal two-thirds or half, narrowed 

 on its upper edge in the remaining distal portion, apex rounded. 



Inferior appendages in profile view reaching to the level of two- 

 thirds or more of the superiors; basal half thick, rounded, upper margin 

 prolonged as a slender process to form the distal half of the appendage, 

 curved upward and inward, apex acute. 



Legs pale yellow ; third tibia with 7-8 spines in the anterior (outer) 

 row. 



Wings clear, veins pale brown ; stigma red, very small, oblique, 

 surmounting from one-third of a cell to slightly less than one cell, 

 variable in its proportions, costal edge on the front wings more often 

 longer than the proximal or distal edges, but on the hind wings longer 

 than, equal to, or shorter than those edges. Vein A (= inferior sec- 

 tor of the triangle of de Selys) separating from the hind margin at, or 

 distal to, the cubito-anal cross-vein (= basal postcostal of de Selys). 

 M 2 (= nodal sector of de Selys) arising on the hind wings nearest the 

 fourth or third postnodal. Postnodals on the front wings 7-8 (7), on 

 the hind 6-7 (6), the parentheses enclosing the numbers of greatest 

 frequency. 



Dimensions : Abdomen 20-21 ; hind wing 13— 14.5 mm. 



$ unknown. 



Habitat : — Brazil, Chapada, by H. H. Smith, 3 $ and parts of 5 

 others. Carnegie Museum, Pittsburgh. 



The specific name proposed has been suggested by the small size of 

 the pterostigma. 



