BITING MIDGES — WIRTH AND BLANTON 



293 



Male genitalia: Ninth sternum with a broad, shallow, caudo- 

 median excavation; ninth tergum short, rounded caudad with two 

 broadly rounded lobes, apicolateral processes absent. Basistyle with 

 ventral and dorsal roots short, slender, subequal; dististyle with 

 enlarged, rounded tip. Aedeagus with main body triangular, basal 

 arms short, basal arch low and rounded, extending to about a fourth 



Figure 12. — Culicoides pusillus Lutz. a-e. Female: a, wing; b, thoracic pattern; c, palpus; 

 d, tibial comb; e, spermathecae. /, g, Male: /, parameres; g, genitalia, parameres re- 

 moved. 



of total length of aedeagus, distal portion slender with a rounded 

 apex, a distinct internal, basally projecting, sclerotized peg present. 

 Parameres separate, each with slender anterolateral arm, base of 

 stem stout, stem tapering to curved, filiform, simple apex. 



Distribution: Brazil; Ecuador; French Guiana; Guatemala; Mex- 

 ico; Panama; Trinidad; Venezuela; West Indies. 



