BITING MIDGES — WIRTH AND BLANTON 



423 



with an irregular pit, sensoria as in patulipalpis and the spots in cell 

 R5 more restricted, the distal one transverse and the posterior post- 

 stigmatic spot greatly reduced or often entirely absent. 



The male genitalia of patulipalpis are similar to those of debilipalpis 

 Lutz, but in patulipalpis the apicolateral processes of the ninth ter- 

 gite are stouter, the caudomedian excavation of the ninth sternum is 

 much deeper, the apex of the aedeagus is much more pointed, and 

 the ventroposterior lobe on the parameres is longer. 



67. Culicoides rangeli Ortiz and Mirsa 



Figure 70 



Culicoides rangeli Ortiz and Mirsa, 1952, Acta Cient. Venezolana, vol. 3, p. 126 

 (female; Los Chorros, Miranda, Venezuela; fig. palpus, antenna; sperma- 

 theca; wing). 



Female: Length of wing 1.01 (0.91-1.19, n = 9) mm. 



Head. — Eyes nearly contiguous, with long interfacetal hairs. An- 

 tenna with flagellar segments in proportion of 17:11:11:12:12:12: 

 12:12:29:30:31:34:36, antennal ratio 1.63 (1.39-1.79, n=4); distal 

 sensory tufts present on segments iii, x-xiv. Palpal segments in 

 proportion of 7:17:20:7:8, third segment swollen, 1.9 (1.5-2.1, n = 7) 

 times as long as greatest breadth, with a very broad, shallow, sensory 

 pit, open and without regular pore. Mandible with 16 (14-20, n=7) 

 teeth. 



Thorax. — Mesonotum blackish, densely hairy, without apparent pat- 

 tern. Scutellum uniformly blackish. Legs dark brown; fore and 

 mid femora with subapical and all tibiae with subbasal narrow pale 



■''•'>n ' ' ' -'^ 





:^.^;.^ 



I'tilfi^vwr^ 



v" " -i^~^ 



k'^^ 



a 



X... 





d 



Figure 70. — Culicoides rangeli Ortiz and Mirsa, female: a, wing; b, tibial comb; c, palpus; 



d, spermatheca. 



