20 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 124 



moderately long, P/H ratio 0.85; mandible with 20 (18-22, n=8) 

 teeth. 



Thorax: Brown; scutum without discernible pattern in slide- 

 mounted specimens. Legs brownish, hind tibia with narrow, sub-basal 

 pale ring; hind tibial comb with 4 spines, the one nearest the spur 

 longest. 



Wing (pi. 1 : fig. 8) : Pattern as figured ; very deeply brownish in- 

 fuscated, with only moderately distinct pattern of pale spots: a small 

 one lying just distad of basal arculus; a pale spot lying over r-m 

 crossvein, broadly meeting costal margin and extending caudad to 

 media; cell R5 with 2 small separate poststigmatic pale spots lying 

 obliquely to each other, the one on anterior with margin smaller, the 

 other lying slightly proximad of end of costa; distal pale spot in cell 

 R5 transverse, slightly concave dis tally, not meeting anterior wing 

 margin or vein Ml; 1 very faint pale spot, sometimes absent, in distal 

 portion of cell Ml, a very faint one, sometimes absent in distal portion 

 of cell M2, the latter proximally with a double pale spot lying between 

 medial and mediocubital forks; cell M4 with very indistinct pale spot 

 in distal portion; anal cell with 2 very indistinct pale spots in distal 

 portion. Macrotrichia moderately numerous, confined to area distad 

 of a line between end of costa and base of mediocubital fork, plus a 

 few in anal cell; costa extending to 0.65 (0.60-0.67, n=4) of distance to 

 wing tip; radial cells subequal in length, with distinct lumens, the 

 second broader. Halter infuscated. 



Abdomen: Dark brown. Spermathecae (fig. 6c) 2 plus a rudimentary 

 third and a sclerotized ring; slightly unequal, measuring 0.049 x 0.030 

 mm and 0.045 x 0.030 mm, oval with moderately long, slender necks. 



Male. — Unknown. 



Types. — Holotype female: 28.4 km east of Purace, 3100 m, Cauca, 

 Colombia, Oct. 29, 1964, V. H. Lee, at light, USNM type no. 69403. 

 Paratypes, 5 females: same data except 2 with date "18 Feb. 1965." 



Remarks. — This species resembles species of the Transferrans 

 Group in general features but differs in the possession of 2 sperma- 

 thecae. Its exact systematic affinities, therefore, remain in doubt. 

 Superficially it is very similar to C. puracensis and C. orjuelai in the 

 subgenus Avaritia, but its palpal structure, eye separation, sperma- 

 theca shape, and number of tibial spines readily distinguish it from 

 members of that group. 



Culicoides tamboensis Wirth and Lee, new species 



Figures Qe-j; Plate 1 (fig. 9-10) 



Female. — Length of wing 1.23 mm. 



Head: Eyes hairy, very narrowly separated (fig. 6/), the inter- 

 ocular space with a seta-less tubercle. Antenna (fig .6e) with lengths of 



