6 PEOCEEDIISrGS OF THE NATIONAL MUSEUM vol.71 



TRINIDADIA MINIMIFACTA (Dyar) 



Fi.iiure.s 29, 48 



Diatraea mmifnifa-cta Dyau, Ent. News, vol. 22, 1911, p. 202. 



A small species Avith Diatraea markings. The males have the fore 

 wings whitish, with the usual lines well relieved but running into a 

 brown shade costally where they seem to join. In the female the 

 fore wing is heavily overspread with brown. 



Expanse. — Male, 14^-11 mm. ; female, 16-19 mm. 



Three males and three females are before us ; from Trinidad ; from 

 St. Jean and Cayenne, French Guiana. 



The larva and life history are unknown. 



Genitalia figured from specimens from the type locality. 



Abdomen of male without tufts on second joint. 



Type. — In National Collection. 



Tyjye locality. — Trinidad, British West Indies. 



Genus DIATRAEA Guilding 



Diatraea Gu?lding, Trans. Soc. Encour. Arts, vol. 46, 1S32, p. 143. — Zeller, 

 Hor. Ent. Ross., vol. 16, 1881, p. 161. — Hampson, Proc. Zool. Soc. Lon- 

 don, vol. 60, 1895, p. 953. — Fernald, Cramb. N. Amer., Bull. Mass. Agr. 

 Coll., 1896, p. 73.— Dyab, Ent. News, vol. 22, 1911, pp. 199-297.— Fobbes, 

 Journ. New York Eat. Soc., vol. 28, 1920, p. 224; Mem. 68, Cornell 

 Univ., Agr. Exp. Sta., 1923, p. 590. 



Front either flat and smooth, bulging, tuberculate or strongly cone 

 shaped. No ocelli. Labial palpi porrect and down-curved, smooth, 

 beaklike, extending over twice the length of head. Maxillary palpi 

 triangularly dilated with scales. Antennae somewhat thickened and 

 minutely pubescent in the male, filiform in the female. Fore wing 

 with vein 3 before angle of cell ; 4 and 5 separate at origin ; 6 below 

 apex of cell ; 7 at apex ; 8-9 stalked from before end of cell ; 10 aris- 

 ing shortly basally thereof; 11 anastomosing with 12. Hind wing 

 with veins 4-5 connate or very shortly stalked from the sharp angle 

 of the cell ; 6 from apex of cell, close to the stalk of 7-8. 



Male genitalia with vinculum rounded or triangular. Harpe 

 undivided, elongately triangular; costa simple or with variously 

 modified basal or subbasal (or both basal and subbasal) projections. 

 Uncus normally triangular, with apex pointed or broadened; some- 

 times greatly broadened. (Figs. 15, 22.) Gnathos normally trian- 

 gular (beak like), with more or less spining toward apex; greatly 

 broadened toward apex only when uncus is similarly modified. 

 Tegumen often with basal or subbasal lateral lobes. Anellus a flat- 

 tened or but slightly curved plate with well-developed lateral arms, 

 and sometimes with a central projection; divided, with one element 

 a small triangular or oval plate (juxta) lying between the bases of 



