BITING MIDGES — WIRTH AND BLANTON 463 



tawny, postscutellum dark brown; pleuron pale with transverse area 

 in middle darker. Legs pale brown, apical bands on all femora, 

 basal and apical bands on tibiae and all of tarsi pale; all femora 

 remarkably stout; hind tibial comb with four (n=5) spines, the one 

 nearest the spur longest. 



Wing. — Pattern as figured; only one very elongate radial cell 

 present; pale spots very extensive, interconnected, more than distal 

 half of radial cell in pale area; dark markings of wing arranged in 

 three transverse areas, the proximal one consisting of a dark spot 

 from costa to media and a dark spot over stem of mediocubitus, both 

 located slightly past midlengths of stems of these veins before the 

 forks; second dark band narrower than pale areas on each side, con- 

 sisting of an anterior spot extending from costa over base of radial 

 cell to include the base of the medial fork, and a posterior spot over 

 mediocubital fork following vein Cui broadly to wing margin; third 

 dark band beginning as an oblique, dark mark across middle of cell 

 R5 from wing margin near apex of cell, broadening toward vein Mi 

 and extending along this vein and forming a broad dark mark in 

 front of its apex, continuing broadly across middle of cells Mj and M2 

 to apex of vein M3+4 and following vein M2 also to its apex. Macro- 

 trichia entirely absent; costa extending to 0.79 (0.78-0.81, n=5) of 

 distance to wing tip. Halter pale. 



Abdomen. — Brown. Spermathecae two, small, pyriform, slightly 

 unequal, measuring 0.038 by 0.031 and 0.036 by 0.026 mm., the bases 

 of the ducts sclerotized a very short distance. 



Male genitalia: Ninth sternum with very shallow caudomedian 

 excavation; ninth tergum short, quadrate, with very small, widely 

 separated, apicolateral processes. Basistyle with ventral root foot- 

 shaped, the posterior heel a short, sharp spur, dorsal root short and 

 relatively stout; dististyle nearly straight, gently tapered to tip 

 which is blunt and slender but not bent. Aedeagus short and stout, 

 basal arms stout and forming a V-shaped anterior arch to a half of 

 total length of aedeagus; distal apex stout and rounded with faint 

 serrations and apparently a few appressed, sharp, flattened, subapical 

 spines. Parameres each with basal knob, stem slender, curved in 

 midportion with a ventral lobe 1.5 times as long as its diameter, 

 distal portion narrowed and tapered to sharp apical point with three 

 or four subapical lateral barbs. 



Distribution: Panama. 



Panama records: 



BocAS DEL ToRO PROVINCE: Almirante. 



Canal Zone: Fort Sherman, Loma Boracho, Mojinga Swamp (type locality). 



C6lon Province: Pina. 



Dari:6n Province: Garachin6. 



