BITING MIDGES — WIRTH AND BLANTON 



427 



69. Culicoides fieldi Wirth and Blanton 



Figure 72 



Culicoides fieldi Wirth and Blanton, 1956, Bull. Brooklyn Ent. Soc, vol. 51, p. 50 

 (male, female; Honduras, Panama; fig. wing, palpus, spermatheca, tibial 

 comb, male genitalia). 



Female: Length of wing 0.72 (0.66-0.76, n=9) mm. 



Head. — Eyes contiguous, with long interfacetal hairs. Antenna 

 with flagellar segments in proportion of 14:11:13:14:13:13:14:17:15: 

 15:18:18:29, antennal ratio 0.85 (0.80-0.92, n = 6); distal sensory 

 tufts present on segments iii, viii-x. Palpal segments in proportion 

 of 7:15:15:7:7, third segment moderately swollen, 1.8 (1.7-1.9, n = 8) 

 times as long as greatest breadth, with a small, deep, sensory pit. 

 Mandible with 12 (11-13, n=ll) teeth. 



Thorax. — Mesonotum (only slide mounted specimens available) 

 apparently without prominent pattern, dark brown. Scutellum, 

 postscutellum and pleuron dark brown. Legs brown, fore and mid 

 femora with very faint subapical pale rings, all tibiae with subbasal 

 and hind tibia with apical distinct pale rings; hind tibial comb with 

 four (n=10) spines, the longest one nearest the spur. 



Wing. — Pattern as figured; pale spot over r-m crossvein small; 

 poststigmatic pale spots in cell Rs more or less separated into two 



Figure 72. — Culicoides fieldi Wirth and Blanton. a, c-e. Female: a, wing; c, palpus; d, tibial 

 comb; e, spermatheca. b, f, Male: h, parameres;/, genitalia, parameres removed. 



