444 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io9 



costa extending to 0.65 (0.59-0.68, n = 37) of distance to wing tip. 

 Halter brownish, the flat end pale. 



Abdomen. — Blackish, cerci yellowish. Spermathecae two, pyri- 

 form, unequal, measuring 0.060 by 0.039 mm. and 0.050 bj- 0.032 mm., 

 the bases of the ducts sclerotized a short distance. 



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

 median excavation; ninth tergum long and tapering with short, 

 triangular, apicolateral processes. Basist^'le with foot-shaped ven- 

 tral root, dorsal root slender ; dististyle slender and curving. Aedeagus 

 with basal arch extending to more than two-thirds of total length, 

 the mesal apex of arch narrow, the basal arms straight; distal stem 

 pointed apically without apparent subapical projections. Parameres 

 each with knobbed base, stem bent near base, very slender and 

 straight in midportion, with a well-developed ventral pouch, distal 

 portion not greatly elongated, with pointed apex and 4-4 lateral barbs. 



Distribution: Brazil; British Guiana; Cuba (La Lolisa) ; Ecuador; 

 French Guiana; Guatemala; Honduras (Lancetilla, Tela); Nicaragua 

 (Guapinula); Panama; Trinidad; Venezuela. 



Panama records: 



BocAS DEL ToRO PROVINCE: Almirante. 



Canal Zone: Farfan Beach, Fort Clayton, Fort Davis, Fort Kobbe, Fort San 



Lorenzo, Huile Sia Clara (?), Las Cruces, Loma Boracho, Mindi Dairy, Mojinga 



Swamp. 

 CniRiQuf Province: Pedregal. 



Cocl6 Province: Aguadulce, Puerto Farall6n, Rio Hato. 

 Herrera Province: Chitre. 



Los Santos Province: Guarare, Las Tablas, Puerto Mensabe. 

 Panama Province: Isla Taboga, Pacora. 



Discussion: Through the courtesy of Dr. A. da Costa Lima, of the 

 Instituto Oswaldo Cruz in Rio de Janeiro, we have been able to 

 examine three slides from the original cotype series of debilipalpis 

 Lutz. On one slide — from Amazonas de Cima, 1913, Lutz^are 

 four females with the following characters: wing length 0.68 (0.66- 

 0.69, n = 3) mm., costal ratio 0.62; eyes broadly separated, with 

 short interfacetal hairs; antenna with flagellar segments in propor- 

 tion of 14:10:11:12:13:13:13:13:13:14:15:16:22, antennal ratio 0.81, 

 distal sensory tufts present on segments iii, viii-x; palpal segments 

 in proportion of 8:17:22:9:11, third segment 2.2 times as long as 

 broad with a deep, small pit; mandible with 18, 20 (n = 2) teeth; 

 spermathecae measuring 0.050 by 0.034 mm. and 0.043 by 0.037 mm. 

 These specimens conform well to the diagnosis of the species based 

 on our Panama material and give reasonable assurance of the cor- 

 rectness of our determination. The other two slides are of a specimen 

 remounted by Costa Lima for his 1937 paper (slides 2828 and 2829 

 made from preparation No. 2411), with the wings on one slide and 



