290 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io9 



marsh at Balboa, Canal Zone. Woke's collections formed part of 

 the type series of diminutus (=wokei Barbosa, not Fox). 



Subgenus Culicoides (Avaritia) Fox 



Culicoides (Avaritia) Fox, 1955, Puerto Rico Journ Agr., vol. 39, p. 218. 



Small species with bluish black mesonotum and pale legs; antenna 

 with sensoria on segments iii, xii or xiii to xv; tibial comb with 5 

 spines; male genitalia with ninth tergum rounded, apicolateral pro- 

 cesses absent, inner margin of basistyle without spinose setae; aedeagus 

 without basal barlike sclerotization or ball-like tip, but with distal 

 peg; parameres separate and short with simple tips. 



Type: Ceratopogon obsoletus Meigen, by original designation. 



Panama species : Two : pusilloides Wirth and Blanton and pusillus 

 Lutz. These species belong to a group distinct from the Holarctic 

 obsoletus group and we will call this the pusillus group. 



8. Culicoides pusilloides Wirth and Blanton 



Figure 11 



Culicoides pusilloides Wirth and Blanton, 1955, Bull. Brooklyn Ent. Soc, vol. 50, 

 p. 104 (male, female; Panama; fig. wing, palpus, spermathecae, male genitalia) 



Female: Length of wing 0.69 (0.63-0.73, n=10) mm. 



Head. — Eyes bare, broadly contiguous. Antenna with flagellar seg- 

 ments in proportion of 14:9:10:11:11:11:12:13:15:16:16:18:28, 

 antennal ratio 1.12 (0.98-1.43, n = 8); distal sensory tufts present 

 on segments iii, xii-xv. Palpal segments in proportion of 5:11:13:5:7, 

 third segment slightly swollen, 1.9 (1.6-2.2, n = 9) times as long as 

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

 13 (12-15, n=8) teeth. 



Thorax. — Mesonotum blackish, anterior margin and two broad 

 sublateral vittae extending the entire lepgth of mesonotum intense 

 black, a broad median band and sides of mesonotum behind level of 

 humeral pits densely bluish gray pruinose] Scutellum, postscutellum 

 and pleuron black. Legs brown, fore and mid femora with broad 

 apical pale rings; fore tibia with narrow and mid tibia with broad, 

 basal pale rings, hind tibia and most of tarsi ^^ellowish; hind tibial 

 comb with five spines, the one next to the spur longest. 



Wing. — Pattern as figured, with four incomplete bands of large, 

 diffuse, pale spots, the dark areas of wing less extensive than the 

 pale areas, distal half of second radial cell in a pale area, each band 

 in cell Rs about half as broad as the pale areas on each side. Macro- 

 trichia nearly absent, only a few along wing margin in cells R5 and Mi; 

 costa extending to 0.57 of distance to wing tip. Halter pale 

 yellowish. 



