410 



PROCEEDINGS OF THE NATIONAL MUSEUM 





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Figure 64. — Culicoides tetrathyris, new species, 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 to 7:21:22:9:9, 

 third segment moderately swollen to apex, 1.9 (1.5-2.1, n = 12) times 

 as long as greatest breadth, with a moderately large and deep sensory 

 pit. Mandible with 14 (12-15, n==13) teeth. 



Thorax. — Mesonotum blackish, with a prominent pattern of prui- 

 nose bluish gray patches as figured, the submedian anterior pair 

 yellowish when viewed from above and behind. Scutellum narrowly 

 dark brown in middle, sides broadly pale yellowish; postscutellum 

 and pleuron blackish. Legs blackish; fore and mid femora with 

 subapical, and all tibiae with sub-basal, narrow whitish rings; hind 

 tibial comb with four (4-5, n=12) long spines, the one next to the 

 spur longest, a third as long as basitarsus. 



Wing. — Pattern as figured, cell Rg with four small, round, pale 

 spots arranged in a trapezoid, two pale spots each in cell Mi and apex 



