BITING MIDGES — WIRTH AND BLANTON 



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Figure 54. — Culicoides dicrourus Wirth and Blanton. a-e, Female: a, wing; b, thoracic 

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

 parameres removed. 



breadth, with a large sensory pit opening by a shghtly smaller pore. 

 Mandible with 13 (12-14, n=ll) teeth. 



Thorax. — Mesonotum elongated, dark brown, with a prominent pat- 

 tern of yellowish patches as figured. Scutellum narrowly dark in mid- 

 dle, yellowish on sides. Legs dark brown, all femora with subapical, 

 tibiae with subbasal and hind tibia with apical, broad yellowish bands: 

 four distal tarsomeres pale; hind tibial comb with four (n = 9) spines, 

 the two adjacent to the spur longest, subequal. 



Wings. — Pattern as figured, large yellow spots at base of wing and 

 over r-m crossvein; cell R5 with two large pale marks, the poststig- 

 matic spot roughly in the form of an incomplete circle isolating a small 

 black round spot just behind end of second radial cell, distal pale spot 

 in cell R5 oblique and hourglass-shaped, very broadly meeting the 



