28 PROCEEDINGS OF THE NATIONAL MUSEUM vol.71 



Female genitalia with ductus strongly chitinized, projecting be- 

 neath into a cleft shield. Area just behind genital opening, and 

 cephelad of it on ventral surface, rather strongly chitinized and pig- 

 mented. Ductus of moderate size, with a complete and strongly 

 chitinized ring in neck. Figured from paratype. 



Abdomen of male without tufts on second segment. 



A male and female are before us, both from the type locality, 

 February, 1904 (W. Schaus). 



The life history is unknown. 



Type.— C2it. No. 29433, U.S.N.M. 



Type locality. — Cayenne, French Guiana. 



DIATRAEA CASTRENSIS, new species 

 Figure 25 



Very similar to amoiemoneUa; the color a little less brown, though 

 still distinctly brown tinted. Separable on details of the genitalia. 



Expanse. — Male, 26 mm. 



Male genitalia similar to those of cayeneTla except that hooklike 

 projection from extreme base of costa of harpe is smooth and nar- 

 rower. The male abdomen also has a pair of lateral tufts on second 

 segment. This species, strigipennellus^ cayeneUa, and hellifacteUa 

 all have a central projection from anellus; but each has quite dis- 

 tinctive genitalia otherwise. 



Described from single male type (Schaus Collection). 



Life history unknown. 



Type.— Cat. No. 29434, U.S.N.M. 



Type loccdity. — Castro, Parana, Brazil. 



Genus HE3IIPLATYTES Barnes and Benjamin 



Hemiplatytcs Barnes and Benjamin, Cont. Nat. Hist. Lepid. N. Amer., vol. 

 5, 1924, p. 192. 



Front flat and smooth. No ocelli. Labial palpi porrect and down- 

 curved, slender, extending three times the length of head. Maxillary 

 palpi triangularly dilated with scales. Male antennae slightly 

 thickened; female, filiform. Fore wing with vein 3 near angle of 

 cell, which is rounded; 4 and 5 separate at origin; 6 below apex of 

 cell ; T at apex ; 8-9 stalked from before apex ; 10 approximate to the 

 stalk of 8-9; 11 anastomosing with 12. Hind wing with 3 and 4 

 separate from angle of cell ; 5 from much above the angle ; the cross- 

 vein between 4 and 5 retreating; 6 from apex of cell, shortly sep- 

 arated from the stalk of 7-8. 



Male genitalia with vinculum narrowly and elongately triangular. 

 Harpe undivided; irregularly and elongately triangular, broad at 



