BITING MIDGES — WIRTH AND BLANTON 331 



the transverse line located at level of lateral sutures. Scutellum nar- 

 rowly brown in middle, yellowish on sides; postscutellum and pleuron 

 brownish. Legs brown; knee spots blackish, femora with subapical, 

 tibiae with subbasal and hind tibiae with apical narrow pale rings; 

 hind tibial comb with four (n = 2) spines, the one nearest the spur 

 longest, very long, 0.4 as long as basitarsus. 



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

 spot over r-m crossvein continued in full breadth to costal margin; 

 poststigmatic pale spots in cell R5 separate, round, the one behind 

 second radial cell larger; distal pale spot in cell R5 double, transverse, 

 reaching anterior wing margin in full breadth; distal pale spot in cell 

 M, oval, located far from wing margin; pale spot present straddling 

 middle of vein M2; one pale spot at the wing margin in distal part 

 of cell M2; pale spot in cell M4 the same breadth from wing margin 

 to posterior side of vein M3+4; a transverse, double pale spot in distal 

 part of anal cell, a small pale spot over anal vein near base of anal 

 cell; pale spot absent in front of mediocubital fork; pale spot behind 

 medial fork and at basal arculus of wing. Macrotrichia very sparse 

 on distal third of wing, none in cell M4 and anal cell; costa extending 

 to 0.63 (n=2) of distance to wing tip. Halter whitish. 



Abdomen, — Dark brown. Spermathecae two, slightly unequal, pyri- 

 form, the larger measuring 0.053 by 0.036 mm. in holotype, the smaller 

 collapsed in available specimens, bases of the ducts sclerotized a con- 

 siderable distance. 



Male genitalia: Ninth sternum with broad, very shallow, caudo- 

 median excavation; ninth tergum tapering with short, triangular, 

 apicolateral processes. Basistyle with ventral and dorsal roots slender, 

 simple, the ventral root pointed; dististyle with slender, hooked, 

 pointed apex. Aedeagus with basal arch reaching 0.6 of total length 

 of aedeagus, rounded mesally, the basal arms slender and curved, the 

 distal portion tapered to slender, simple tip. Parameres each with 

 basal knob bearing a long anterior process, stem narrow at extreme 

 base, stout on midportion and sinuate, apparently (?) bearing a 

 very low, extensive ventral lobe, distal points simple, with a long 

 twist ventromesad. 



Distribution: Panama. 



Specimens examined: Holotype female (USNM 63163), Almirante, 

 Bocas del Toro Province, Panama, Apr. 29, 1953, F. S. Blanton, light 

 trap. Allotype male, same data except date November 1952. Para- 

 types, 1 male, 3 females: 1 male, 2 females, Cerro Campana, Panamd 

 Province, July 2, Sept. 19, 1951; 1 female, Mojinga Swamp, Canal 

 Zone, January 1952. 



Discussion: Culicoides daedalus Macfie has a similar wing pattern 

 and male genitalia, but has the wing much hairier with the post- 



