BITING MIDGES — WIRTH AND BLANTON 449 



Wing. — Pattern as figured, the membrane grayish with very promi- 

 nent, small, milky white spots; second radial cell very dark; pale spot 

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

 cell R5 with five small pale spots — one lying on anterior side of vein 

 Ml at base of cell, and four lying in an irregular oval group in mid- 

 dle of cell, of the four, a round one lies at costal margin just beyond 

 second radial cell, two round ones lie behind second radial cell, and 

 a crescent-shaped one, the convex side distad, lies across subapical 

 part of cell; apices of veins Mi, M2, M3+4 and Cui pale; two small 

 round pale spots in cell Mi, the distal one lying far from wing mar- 

 gin; pale spot in apex of cell M2 and in cell M4 lying far from wing 

 margin; only one pale spot in distal part of anal cell; cell M2 with a 

 linear spot lying in front of convex part of vein M3+4, a pale spot 

 lying in front of mediocubital fork, one lying behind medial fork, one 

 extending across middle of stem of mediocubitus and one extending 

 to base of wing over base of medial vein. Macrotrichia moderately 

 numerous on distal half of wing, barely extending to apex of anal 

 cell; costa extending to 0.63 (n = 3) of distance to wing tip. Halter 

 pale, anterior side of knob brownish. 



Abdomen. — Spermathecae two, subequal, pyriform, with short 

 sclerotized necks. 



Male Genitalia: Ninth sternum with a very slightly perceptible 

 caudomedian excavation; ninth tergum slightly tapered, with long, 

 pointed, apicolateral processes. Basistyle with ventral lobe foot- 

 shaped, the posterior heel not developed, dorsal root longer and 

 slender; dististyle slender, nearly straight with slender rounded tip 

 slightly bent. Aedeagus with low, broad, mesallj^ rounded basal 

 arch extending to a third of total length of aedeagus, basal arms stout, 

 distal portion slightly tapered to a slender, truncated apex. Para- 

 meres each with basal knob, stem nearly straight and very slightly 

 swollen to midlength, without ventral lobe, distal portion long and 

 narrowed gradually to simple, recurved, flattened points. 



Distribution: Venezuela; Panama. 



Panama records: 



BocAS DEL ToRO PROVINCE: Almirante. 



Canal Zone: Fort Clayton, Fort Davis, Fort Gulick, Fort Sherman, Loma 

 Boracho, Mojinga Swamp. 



Discussion : This species closely resembles ginesi Ortiz in mesonotal 

 and wing markings, and the two apparently are closely related, but 

 ginesi has much different male genitalia (similar to those of ho^mani 

 Fox), only three pale spots in a triangle in cell R5, and the apices of 

 the wing veins not pale at the wing margin. 



