22 PROCEEDINGS OP THE NATIONAL MUSEUM vol.71 



DIATRAEA FUSCELLA Schaus 



Figures 15, 61 



Diatraea fuscella Schaus, Proc. Ent. Soc. Washington, vol. 24, 1922, p. 139. 



Similar to hellifacteUa, distinctly darker, with broad intervenular 

 streaks; cross lines indicated by discolorous blackish dots on the 

 veins, of the same color as the discal and terminal dots. Hind wing 

 brown, about as dark in the female as in the male. Front with a 

 pointed conical tubercle. Hind tibia of the male without hair tuft. 



Expanse. — Male, 23 mm.; female, 23-32 mm. 



Male genitalia with tegumen greatly developed, semitubular. Un- 

 cus and gnathos \Qvy stout and broad toward their extremities. 

 Harpe with a slight^ strongly haired hump at base of costa, other- 

 wise simple and much as in zeacolella and postlineetta. Anellus 

 with lateral arms moderately long and smooth. Penis without dis- 

 tinguishable cornutus. Figured from type. 



Female genitalia resembling those of canella^ but with an un- 

 wrinkled genital opening and v/ith a slightly different chitinization 

 in the neck of the bursa. Figured from specimen from Che j el, 

 Guatemala. 



Abdomen of male with a pair of lateral hair tufts on second 

 segment. 



Easily distmguished by the peculiarly shaped tegumen, uncus, and 

 gnathos of the male genitalia. 



One male and three females before us : Carillo and Guapiles, Costa 

 Eica; Chejel, Guatemala. 



The life history is unknown. 



Type. — In National Collection. 



Type locality. — Carillo, Costa Rica. 



DIATRAEA VENOSALIS (Dyar) 

 Figures 16, 58 



HaimMcMa venosalis Dyar, Ins. Ins. Mens., vol. 5, 1917, p. 87. 

 Diatraea (?) venosalis Forbes, Journ. New York Ent. Soc, vol. 28, 1920, 

 p. 221. 



A very small species, distinctly marked. Ground of fore wing 

 whitish; veins and interlines more faintly brown; discal dot large; 

 brown terminal dots small. Hind wing white in both sexes. Front 

 without a tubercle. Hind tibia of the male without a hair tuft. 



Expanse. — Male, 15-19 mm.; female, 21 mm. 



Genitalia similar to those of gaga, distinguished only by the some- 

 what stronger spining on gnathos of male and a slightly heavier 

 chitinization at the juncture of ductus and bursa (in female). 



Abdomen of male with pair of lateral hair tufts on second segment. 



