408 



PROCEEDINGS OF THE NATIONAL MUSEUM 





Ic.YAMfl^"' 



Figure 63. — Culicoides fluvialis Macfie. a-e, Female: a, wing; b, thoracic pattern; c, palpus; 

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



segments iii, viii-x. Palpal segments in proportion of 6:15:16:7:7, 

 third segment short and slightly swollen, 1.8 (1.7-1.9, n = 9) times as 

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

 with 13 (12-15, n=7) teeth. 



Thorax. — Mesonotum grayish pruinose, blackish between the 

 humeral pits, with a prominent pattern consisting mainly of a sub- 

 lateral pair of brown bands, widest at level of the lateral suture, 

 leaving a median anterior pair of elongated yellowish gray spots. 

 Scutellum brown in middle, yellowish gray on sides; postscutellum 

 and pleuron dark brown. Legs brown; knee spots blackish; all 

 femora with subapical and all tibiae with subbasal narrow pale rings; 

 femora pale at bases; hind tibial comb with four (n = 7) spines, the one 

 nearest the spur longest. 



Wing. — Pattern as figured; second radial cell moderately dark; a 

 small pale spot over r-m crossvein; cell R5 with two separate, round, 

 poststigmatic pale spots, the posterior one located behind second 



