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PROCEEDINGS OF THE NATIONAL MUSEUM 



lacking sensoria on any of antennal segments iv to x. Pilosus, new 

 species, of the copiosus group has a nearly identical wing pattern but 

 differs in having a paler, more yellowish mesonotal pattern and 

 sensoria present on all of segments iii to ix. 



26. Culicoides dunni, new species 



Figure 29 



Female: Length of wing 1.12 (n=2) mm. 



Head. — Eyes narrowly separated, bare. Antenna with flagellar 

 segments in proportion of 18 : 14 : 15 : 15 : 15 : 15 : 15 : 15 : 21 :24 : 27 :28 : 38, 

 antennal ratio 1.13, distal sensory tufts present on segments iii, iv, 

 VI, VII, IX and xi-xv on one antenna and on segments iii, vi-ix (seg- 

 ments xi-xv missing) on other antenna of the single specimen avail- 

 able. Palpal segments in proportion of 11 :21 :36:8:9, third segment 

 very large and swollen, 2.06-2.25 (n=2) times as long as greatest 

 breadth, with a large deep pit opening by a small pore. Mandible 

 with 18 teeth. 



Thorax. — Mesonotum yellowish brown, blackish on anterior and 

 lateral margins, with a moderately distinct, dark brown pattern con- 

 sisting of a very narrow median anterior line and two short, broad, 

 sublateral vittae at sutural level. Scutellum dark brown in middle, 

 yellowish brown on sides; postscutellum and pleuron blackish. Legs 



-■^^^^^^^ 



Figure 29. — Culicoides dunni, new species. Female: a, wing; b, thoracic pattern; c, tibial 

 comb; d, spermathecae; e, palpus. 



