BITING MIDGES — WIRTH AND BLANTON 451 



Thorax. — Mesonotum pruinose yellowish brown, with irregular 

 pattern of dark brown dots at seta bases and splotches from their 

 occasional fusion. Scutellum pale on sides, brown in middle; post- 

 scutellum dark brown, pleuron yellowish with a broad, transverse, 

 brown band. Legs brown, femora with broad basal and subapical 

 pale bands, all tibiae with broad subbasal and fore and mid tibiae 

 with broad apical pale bands; tarsi pale, hind tibial comb with 

 four (n = 9) spines, the two nearest the spur longest, subequal. 



Wing. — Pattern as figured; cell R5 with three well-separated spots 

 arranged in a triangle; two pale spots in cell Mi, one each in distal 

 portions of cells M2, M4 and anal cell, all lying distant from wing 

 margin; pale spot present lying behind medial fork and one lying 

 ahead of mediocubital fork. Macrotrichia numerous on distal half 

 of wing and a few extending in a double row to base of cell M and a 

 few in anal cell; costa extending to 0.62 (0.59-0.68, n = 10) of distance 

 to wing tip. Halter pale. 



Abdomen. — Brown, cerci pale. Spermathecae two, slightly ovoid, 

 subequal, each measuring 0.047 by 0.034 mm., the bases of the ducts 

 not sclerotized. 



Male genitalia : Ninth sternum broad, with a deep caudomedian 

 excavation; ninth tergum short and tapering, with ver}^ long, triangu- 

 lar, apicolateral processes. Basistyle with foot-shaped ventral root, 

 the posterior heel not developed, dorsal root shorter and stout; 

 dististyle stout at base, tip slightly bent and slender. Aedeagus 

 with very low basal arch, the basal arms short and stout, distal stem 

 very broad and bearing apically two or three sublateral pairs of long, 

 pointed, sclerotized processes in a distal row. Parameres each with 

 stout basal knob, stem greatly swollen in basal portion, abruptly 

 bent at most swollen portion, without ventral lobe, tapered distally 

 to slender, simple, only slightly curved distal points. 



Distribution: Venezuela; Panama. 



Panama records: 



BocAs DEL ToRO PROVINCE: Almirante. 



Canal Zone: Fort Clayton, Fort Davis, Fort San Lorenzo, Fort Sherman, Loma 



Boracho, Mojinga Swamp. 

 CocLii Province: Aguadulce. 

 Los Santos Province: Puerto Mensab^. 

 PanamI Province: Arraijdn, Tocumen. 



Discussion : This very characteristic and strikingly marked species 

 takes its place in the debilipalpis group, with wing, mesonotal and leg 

 markings allying it with aureus Ortiz. The male aedeagus of ginesi 

 bears distal processes similar to but more numerous and more extreme 

 in development than those of hqffmani. 



