12 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



as figured; ninth tergum rounded caudad, indistinctly bilobed, apico- 

 lateral processes short and moderately prominent, widely separated; 

 ninth sternum with very slight caudomedian excavation, the ventral 

 membrane not spiculate; basistyle moderately stout, mesal margin 

 with numerous small but moderately prominent setae, ventral and 

 dorsal roots short and blunt; dististyle long and curved with a stout 

 rounded tip. Aedeagus with very low basal arch, midportion broad a 

 short distance, then tapered gradually to a long slender distal stem 

 with a small ball-like tip. Parameres separate, each (fig. 3/) with a 

 short, stout anterolateral process, midportion swollen a short distance, 

 tapered distally to a long, slender filament bearing minute hairs 

 dis tally. 



Types. — Holotype female, allotype male: 28.4 km east of Purace, 

 3100 m, Cauca, Colombia, V. H. Lee, at light, USNM type no. 69399. 

 Para types, 2 males, 70 females: same data as types. 



Kemarks. — This species belongs to the Covagarciai Group of the 

 subgenus Culicoides, with knees broadly yellow banded, and it is 

 most like C. marshi Wirth and Blanton. It differs from the latter, 

 however, in its larger size, slenderer legs with 6 tibial spines, more 

 gradually tapering spermathecae, less extensive pale wing spots, with 

 vein M2 forming a dark line through the pale spot straddling vein M2. 

 The genitalia of a male of C. marshi (not previously described) from 

 Rio Raposo, Colombia, differ from those of C. popayanensis in their 

 well-developed submedian lobes on the ninth tergum similar to those 

 of C. metagonatus Wirth and Blanton (figured in Wirth and Blanton, 

 1959, p. 306). 



Subgenus Diphaomyia Vargas 



Species with the second radial cell dark to tip; wing pattern with 

 small, definite pale spots, the pale spot at r-m crossvein often lying 

 entirely distad of crossvein, vein Ml often with pale spots lying 

 adjacent anteriorly in cell R5, veins Ml and M2 often with pale spots 

 straddling them or lying adjacent to the vein, pale spot in cell M4 

 usually extending along vein M3+4; 2 spermathecae plus rudi- 

 mentary third and small sclerotized ring; spermathecae oval in shape 

 with long slender necks; male genitalia with pair of characteristic 

 posterior sclerotized processes on posterolateral "shoulder" of aede- 

 agus; parameres with basal knob and distal portion with lateral 

 fringing barbs. 



In Wirth and Blanton (1959), the three previously known Neo- 

 tropical species, C. blantoni Vargas and Wirth, C. evansi Wirth and 

 Blanton, and C. iriartei Fox, were placed in the Iriartei Group of the 

 subgenus Oecacta. These species can be placed conveniently in Vargas' 

 (1960) subgenus Diphaomyia, with type species C. baueri Hoffman. 



