374 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io9 



cubital fork, two separate small pale spots behind base of medial fork 

 and a proximal small pale spot lying in front of middle of mediocubital 

 stem; base of wing with a pale spot. Macro trichia fairly numerous 

 over wing, including all of anal cell but not extending into proximal 

 half of cell M2; costa extending to 0.58 (0.56-0.59, n=10) of distance 

 to wing tip. Halter whitish, the base of the knob dark. 



Abdomen. — Brownish black; cerci yellowish. Spermathecae two, 

 pyriform, slightly unequal, measuring 0.064 by 0.044 mm. and 0.057 

 by 0.038 mm., the bases of the ducts sclerotized a short distance. 



Male genitalia: Ninth sternum with a moderately narrow, deep, 

 caudomedian excavation; ninth tergum broad apically, with short, 

 triangular apicolateral processes. Basistyle with ventral root foot- 

 shaped, dorsal root slender; dististyle slightly curved with fairly blunt 

 tip. Aedeagus with narrow, pointed basal arch extending to 0.8 of 

 total length, the basal arms stout and nearly straight with flaring 

 bases, a sclerotized membrane extending across distal fifth of arch; 

 distal portion short, with truncated apex. Parameres each with large 

 basal knob, stem moderately stout and slightly sinuate, bearing a 

 short ventral lobe distally, the distal portion slender and bearing a 

 lateral fringe of 4-5 spines well back from the pointed, simple tip. 



Distribution: Venezuela; Chile; Panama; Trinidad (Port 

 Delgada) . 



Panama records: 

 CniKiQuf Province: Volcdn. 



Discussion: The synonymy of venezuelensis was published by 

 Wirth (1955) after a comparison of the type of pictipennis (Philippi) 

 from Santiago, Chile, with paratype material of venezuelensis from 

 Venezuela. 



46< Culicoides lanei Ortiz 



Figure 49 



Culicoides lanei Ortiz, 1950, Rev. Sanid. Asist. Soc, vol. 15, p. 431 (male; Cerro 

 Sefa, Panama; fig. wing, mesonotum, palpus, genitalia); 1951, idem., vol. 

 16, p. 577 (notes; fig. wing, mesonotum, palpus, genitalia of male). 



Female: Length of wing 1.02 (0.96-1.12, n = 7) mm. 



Head. — Ej^es narrowly separated, bare. Antenna with flagellar 

 segments in proportion of 21:17:20:20:20:20:20:21:19:21:20:20:33, 

 antennal ratio 0.72; distal sensory tufts present on segments iii, 

 vii-x. Palpal segments in proportion of 10:15:23:9:10, third segment 

 moderately swollen, 1.8 (1.6-2.1, n = 6) times as long as greatest 

 breadth, with a small, deep, sensory pit. Mandible with 13 (12-14), 

 n=4) teeth. 



Thorax. — Mesonotum dark brown, with a prominent pattern of 

 round or oval, yellowish gray pruinose patches as figured. Scutellum 



