BITING MIDGES — WIRTH AND BLANTON 



403 



y^ ^ ( ^ ^ i ^ ^^^ {f^\^ ^'^' '' *^'T^y^' ^ 0t. 



Figure 61. — Culicoides gorgasiWirth and Blanton. a-e, Female: a, wing; b, thoracic pattern; 

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

 removed. 



extending nearly to base of cell M; costa extending to 0.64 (0.61-0.67, 

 n=10) of distance to wing tip. Halter knob infuscated. 



Abdomen. — Dark brown, cerci pale. Spermathecae two, ovoid, 

 slightly unequal, measuring 0.054 by 0.039 mm. and 0.049 by 0.036 

 mm., the bases of the ducts sclerotized a short distance. 



Male genitalia. — Ninth sternum with broad, shallow, caudome- 

 dian excavation ; ninth tergum long with long, triangular, apicolateral 

 processes. Basis tyle with ventral root foot-shaped, the posterior heel 

 well developed, dorsal root slender; dististyle long and slender with 

 hooked apex. Aedeagus with basal arch extending to three-fourths of 

 total length of aedeagus, basal arms well sclerotized and nearly straight, 

 the basal arch narrow caudomedially; distal portion short and simple, 

 with moderately broad, truncate apex, the subapical, lateral points at 



