BITING MIDGES — WIRTH AND BLANTON 329 



blackish brown; fore and mid femora with subapical and all tibiae 

 with subbasal, narrow pale rings; hind tibial comb with four spines, 

 the two nearest the spur longest, subequal. 



Wing. — Pattern as figured; three relatively dark anterior spots, 

 the second entirely covering second radial cell; pale spot over r-m 

 crossvein large, extending broadly to costal margin and through half 

 the width of cell M2; poststigmatic pale spot narrow, transverse, 

 quadrate in shape, distal pale spot in cell R5 of same size and shape 

 or slightl)^ shorter, a very dark spot in cell R5 of the same size and 

 shape between the pale spots; vein Mi with an elongate pale spot 

 lying on anterior side of vein or extending over it slightly into cell 

 M2, at level of the poststigmatic pale spot in cell R5; distal pale spot 

 in cell Ml lying far from wing margin; apices of veins without pale 

 spots; a large pale spot straddling middle of vein M2; distal pale 

 spot in cell M2; distal pale spot in cell M2 not meeting wing margin; 

 pale spot in cell M4 broadly meeting wing margin and with narrow 

 extension anteriorly to vein M3+4; anal cell with two pale spots in 

 distal portion, the posterior one broadly meeting wing margin, one 

 posterior spot far from wing margin in basal part of cell and a fourth 

 pale area extending across mediocubital stem to halfway across base 

 of cell M2; cell M2 also with a small pale spot lying in front of medio- 

 cubital fork and a very small one behind medial fork. Macrotrichia 

 numerous and long on entire wing, extending to base of cell M2 and 

 anal cell; costa extending to 0.56 of wing length. Halter yellowish. 



Abdomen. — Brownish black, cerci dull yellowish, Spermathecae 

 two, subspherical, subequal, small, measuring 0.046 by 0.036 mm., 

 the bases of the ducts sclerotized a very short distance. 



Male: Unknown. 



Distribution: Panama. 



Specimens examined: Holotype female (USNM 63162), VolcAn, 

 Chiriqui Province, Panama, December 1952, F. S. Blanton, light trap. 

 Paratypes, 4 females, same data except three with dates Apr. 4, 1954. 



Discussion: Culicoides propinquus Macfie from Chiapas, Mexico, 

 has a similar wing pattern which differs in having the pale spot lying 

 in front of vein Mi not crossing over the vein and lying distal to the 

 level of the poststigmatic pale spot in cell R5. C. propinquus is known 

 only from the male, whose genitalia place it definitely in the copiosus 

 group near poikilonotus Macfie. The sensorial pattern of dunni aUies 

 it with the species of the daedalus group. 



This species is dedicated to Dr. Lawrence H. Dunn, for many 

 years medical entomologist and assistant director of the Gorgas 

 Memorial Laboratory, in honor of his contributions to science in 

 Panama. 



