BITING MIDGES — WIRTH AND BLANTON 401 



tion of 9:17:21:8:8, third segment moderately swollen, 2.2 (1.8-2.3, 

 n = 3) times as long as greatest breadth, with a small, deep sensory pit. 



Thorax. — Mesonotum pruinose gray with pattern of dark brown 

 punctiform dots at bases of mesonotal hairs, these dots irregularly 

 fused in some areas, principally in two sublateral, longitudinal bands. 

 Scutellum narrowly dark in middle, yellowish on sides. Postscutellum 

 and pleuron dark brown. Legs dark brown; knee spots blackish, all 

 femora with subapical, all tibia with subbasal and hind tibia with 

 apical, narrow pale rings; hind tibial comb with four (n = 5) spines, 

 the one nearest the spur longest. 



Wing. — ^Pattern as figured, large yellowish anterior spots at wing 

 base and over r-m crossvein; two longitudinally elongate poststigmatic 

 pale spots in cell R5, narrowly fused to form an hourglass-shaped spot; 

 distal pale spot in cell R5 large, rounded and broadly meeting anterior 

 wing margin; two pale spots in cell Mj, the proximal one streaklike 

 and lying adjacent to vein M2, the distal one usually connected by a 

 narrow pale line to wing margin; veins Mi and M2 very faintly pale 

 margined on distal halves; a pale line running tlu-ough cell M2 to the 

 pale spot at apex of cell M2; large pale spot in cell M4; two pale spots, 

 more or less coalesced, in distal part of anal cell. Macrotrichia 

 numerous on distal half of wing and a few in anal cell ; costa extending 

 to 0.58 (0.57-0.59, n = 5) of distance to wing tip. Halter dark. 



Abdomen. — Dark brown, cerci pale. Spermathecae two, subequal, 

 each measuring 0.045 by 0.030 mm., the bases of the ducts sclerotized 

 a short distance. 



Male genitalia : Ninth sternum with broad caudomedian excava- 

 tion; ninth tergum long, the apicolateral processes moderately long 

 and slender. Basistyle with slender, foot-shaped ventral root, dorsal 

 root slender; dististyle long and very slender, with bent apex. 

 Aedeagus with basal arch extending to about 0.7 of total length of 

 aedeagus, basal arms slender and slightly curved, distal portion 

 tapered to slender, rounded point with an indistinct lateral pair of 

 pointed hyaline processes near juncture with the arch. Parameres 

 each with strongly sclerotized basal knob, stem slender and curved 

 near base, distal portion gradually more swollen, until there arises a 

 distinct low ventral lobed area beyond which the distal portion is 

 quite slender, tapering to fine point with a few minute lateral barbs. 



Distribution: Panama; Bahamas; United States (Florida). 



Panama records: 



Canal Zone: Balboa (Apr. 28, 1942, P. A. Woke, biting man; including 3 para- 

 types of wokei Barbosa not Fox) ; Fort Randolph, Fort Sherman, Loma 

 Boracho, Mojinga Swamp (type locality). 



Discussion: Like the closely related alahialinus Barbosa, this 

 species is apparently restricted in Panama to localities with saline 



