BITING MIDGES WIRTH AND BLANTON 



281 



3. --=3 



'%##li»l 



Figure 7. — Culicoides diabolicus Hoffman, a-e. Female: a, wing; b, thoracic pattern; c, 

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

 removed. 



Female: Length of wing 1.03 (0.92-1.22, n=35) mm. 



Head. — Eyes contiguous, bare. Antenna with flagellar segments in 

 proportion of 20:15:15:15:15:15:15:16:22:22:26:30:45, antenna! ratio 

 1.14 (1.09-1.17, n = 4); distal sensory tufts present on segments 

 III, xi-xv. Palpal segments in proportion of 9:23:30:13:12, third 

 segment 3.0 (2.4-3.7, n = 29) times as long as greatest breadth, with 

 a broad, shallow, sensory pit. Mandible with 15 (14-18, n = 34) 

 teeth. 



Thorax. — Mesonotum with a prominent pattern, yellowish in 

 center, with a pair of prominent blackish sublateral vittae. Legs 

 brown, fore and mid knees broadly yellow on femora and tibiae, hind 

 femur dark to apex; hind tibia with broad basal and apical yellowish 

 bands; hind tibial comb with five spines. 



