14 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 124 



definite; small pale spot lying just distad of r-m crossvein, the cross- 

 vein dark; a small transverse poststigmatic pale spot not attaining 

 vein Ml posteriorly; 1 small transverse pale spot in middle of distal 

 portion of cell R5, not meeting wing margin or vein Ml; 2 pale spots 

 in cell Ml, the proximal one touching vein M2 posteriorly, the distal 

 one lying far from wing margin; 2 separate pale spots in proximal 

 portion of cell M2, one of which lies behind medial fork, the other just 

 in front of mediocubital fork; only 1 pale spot in distal portion of cell 

 M2, lying near but not meeting wing margin; cell M4 with a round 

 pale spot with an anteroproximal extension a short distance along vein 

 M3+4; anal cell with an indistinct pale spot in anal angle and a large, 

 transverse double pale spot in distal portion. Macrotrichia coarse 

 and numerous distad of r-m crossvein and over all of anal cell; costa 

 extending to 0.58 (0.57-0.59, n=13) of distance to wing tip; radial 

 cells narrow, the first slitlike and longer than the second. Halter 

 infuscated, the flat end of the knob pale. 



Abdomen: Dark brown. Spermathecae (fig. 4(Z) 2 plus a rudimentary 

 third and a peculiarly shaped, flangelike, sclerotized ring; moderately 

 sclerotized, subequal, each measuring 0.053 x 0.035 mm, oval with a 

 long, slender, sclerotized neck. 



Male. — Similar to the female, with the usual sexual differences; 

 wing 1.53 mm long; antennal segments with lengths in proportion of 

 38-14-14-14-14-14-14-14-14-17-52-42-46; distal sensory tufts on 

 segments in, vin-xn. Genitalia (figs. 4e,f) as figured: Ninth 

 sternum with broad, moderately deep caudomedian excavation, the 

 ventral membrane not spiculate; ninth tergum long and tapering, 

 apicolateral processes short and angular, the caudal between them 

 nearly straight. Basistyle slender, dorsal root foot-shaped with 

 relatively short "toe" and "heel," ventral root slender; dististyle 

 slightly curved, slender, with bent, pointed tip. Aedeagus with short, 

 broad, rounded, basal arch extending to less than half of total length; 

 "shoulders" each with a short posterior sclerotized process typical of 

 Diphaomyia; distal stem parallel sided with bluntly rounded tip. 

 Parameres each (fig. 4e) with blackish basal knob, midportion slender 

 and slightly curved with a low ventral lobe distally; distal portion 

 much slenderer, tapering distally to terminal filament and bearing a 

 lateral fringe of 5-6 coarse barbs. 



Types. — Holotype female: Lago Buey, 3250 m, Paramo de Purac6, 

 Cauca, Colombia, Oct. 28, 1964, V. H. Lee, biting man, USNM type 

 no. 69400. Allotype male: 18 km east of Purace, 3320 m, Oct. 29, 

 1964, V. H. Lee, at light. Paratypes, 63 females: 61, same data as 

 holotype; 2, same data as allotype. 



Remarks. — This species is distinguished readily by its wing pattern 

 of definite small pale spots on a very dark ground, with the pale spot 



