BITING MIDGES — WIRTH AND BLANTON 



277 



^, ., I <' (' iiii^ijiL u eif ^ 



Figure 5. — Culicoides hylas Macfie. a-e. Female: a, wing; b, thoracic pattern; c, palpus; 

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



Abdomen. — Blackish, cerci yellow. Spermathecae two, slightly 

 ovoid, unequal, measuring 0.057 by 0.044 and 0.044 by 0.038 mm. 



Male genitalia: Indistinguishable from those of heliconiae, except 

 for the shape of the base of the parameres, which in hylas is much 

 shorter and more quadrate, about twice as broad as long. 



Distribution: British Guiana; Honduras; Nicaragua; Panama; 

 Peru. 



Panama records: 



BocAS DEL ToRO PROVINCE! Almirante. 



Canal Zone: Albrook Field, Balboa, Barro Colorado Island (bred from Calathea 

 violacea), Cabima, Fort Clayton, Fort Davis, Fort Kobbe, Fort San Lorenzo, 

 Fort Sherman, Galeta Point, Gamboa, Huile Sia Clara (?), Loma Boracho, 

 Madden Dam, Mindi Dairy, Mojinga Swamp. 



CHiRiQuf Province: Algarrobo, Chiriquf, Concepci6n, David, Tortugas. 



