472 



PROCEEDINGS OF THE NATIONAL MUSEUM 



Figure 9\.—Culicoides willistoni Wirth and Blanton. a-e. Female: a, wing; b, thoracic 

 pattern; c, palpus; d, tibial comb; e, spermathecae. /, g, Male:/, parameres; g, genitalia, 

 parameres removed. 



confluent on middle of anterior margin and on sublateral areas be- 

 tween the suture and wing bases. Scutellum bluish gray pruinose, 

 dark brown in middle; postscutellum and pleuron blackish with vari- 

 able grayish pollinosity. Legs brown; bases of femora pale; femora 

 with subapical, tibiae with subbasal and hind tibia with apical, nar- 

 row pale rings; hind tibial comb with six (n = 5) spines, the one nearest 

 the spur longest; fourth tarsal segments cordiform. 



Wing. — Pattern as figured; grayish with distinctly white spots; 

 second radial cell blackish, very narrow, the radial veins thickened; 

 pale spot over r-m crossvein very large, extending into base of cell 

 M2; cell R5 with four pale spots, the three poststigmatic spots small 

 and round and situated in a triangle, distal spot large and u-regular, 

 and broadly meeting anterior wing margin, a blackish area located m 



