BITING MIDGES — WIRTH AND BLANTON 



371 



tfiiiBii^^^ 



Figure 47. — Culicoides guyanensis Floch and Abonnenc. a-e, Female: a, wing; b, thoracic 

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

 parameres removed. 



Male genitalia: Ninth sternum remarkably long, without appre- 

 ciable caudomedian excavation; ninth tergum quadrate, with slender, 

 pointed, apicolateral processes. Basistyle with ventral root long 

 and slender, dorsal root shorter and stouter; dististyle tapered to 

 slender pointed tip. Aedeagus remarkably modified: basal arch 

 broad and round, extending to half of total length, the basal arms 

 curved and strongly sclerotized: distal portion with the long, slender 

 median lobe detached at the base, its base curving dorsad of the 

 arch and its proximal end lying free a short way between basal arms; 

 a pair of slender, pointed, lateral lobes nearly as long as median lobe 

 arising from basal arch on each side of median lobe. Parameres 

 separate, each with basal lobe bearing a slender anterior process; 



