BITING MIDGES — WIRTH AND BLANTON 469 



blue-green pruinose, with or without brown punctiform dots; eyes 

 contiguous; fourth tarsal segment cordiform; antenna with sensoria 

 present on segments iii-x or on iii, vi-x; palpal pit absent; six or 

 seven tibial spines; two spermathecae; male genitalia with ventral root 

 foot-shaped; parameres separate, basal knob simple, stem straight, 

 with simple, bent distal point. 



There are two species in this subgenus, both of which occur in 

 Panama: phlebotomus (Williston) and willistoni Wirth and Blanton. 



87. Culicoides phlebotomus (Williston) 



Figure 90 



Ceratopogon phlebotomus Williston, 1896, Trans. Ent. Soc. London, vol. 3, p. 281 

 (female; St. Vincent Island; fig. wing, palpus). 



Culicoides phlebotomus, Kieffer, 1906, Genera Insectorum, fasc. 42, p. 55.— Hoff- 

 man, 1925, Amer. Journ. Hyg., vol. 5, p. 285 (female; Puerto Rico; fig. 

 wing).— Painter, 1926, United Fruit Co. Med. Rep., vol. 15, p. 258 (Hon- 

 duras, biology).— Fo.x, 1942, Puerto Rico Journ. Pub. Health Trop. Med., 

 vol. 17, p. 419 (pupa; Virgin Islands; fig.).— Ortiz and Mirsa, 1952, Rev. 

 Sanid. Asist. Soc, vol. 17, p. 275 (male, female; Venezuela; fig. sperma- 

 thecae, antenna, palpus, tarsus, wing, male genitalia).— Wirth and Blan- 

 ton, 1953, Ent. News, vol. 64, p. 114 (male, female; Puerto Rico, Mexico, 

 Honduras, Nicaragua, Panama, Venezuela, Brazil; fig. wing, tarsus, male 

 genitalia; synonym, amazonius Macfie). 



Culicoides amazonius Macfie, 1935, Stylops, vol. 4, p. 52 (male, female; Tutoia, 

 Brazil; fig. male genitalia).— Floch and Abonnenc, 1942, Inst. Pasteur 

 Guyane Terr. I'Inini, publ. 37, p. 3 (French Guiana; fig. wing, palpus). 



Female: Length of wing 1.03 (0.89-1.15, n=8) mm. 



Head. — Eyes contiguous a short distance, bare. Antenna with 

 flagellar segments in proportion of 16:11:11:12:12:11:11:11:16:18:20: 

 21:38, antennal ratio 1.19; distal sensory tufts present on segments 

 III, and V or vi to x. Palpal segments in proportion of 13 :24 :26 :10 :13, 

 third segment slightly swollen, 2.2 (1.8-2.5, n = 7) times as long as 

 greatest breadth, with a large, irregular, open sensory area. Mandible 

 with 15 (13-17, n = 7) teeth. 



Thorax. — Mesonotum densely grayish, blue-green pollinose, without 

 prominent pattern, sometimes with a pair of faint brownish longi- 

 tuduial striae, with prominent blackish hairs. Scutellum, postscutel- 

 lum and pleuron dark brown with dense grayish pollen. Legs yellow- 

 ish brown, without distinctive bands; hind tibial comb with seven 

 (6-8, n = 8) spines, the one nearest the spur longest; fourth tarsal 

 segments cordiform. 



Wing. — Pattern as figured; color smoky brownish with distinct 

 white spots; second radial cell blackish, the veins surrounding it very 

 greatly thickened, the cell itself narrow; pale spot over r-m crossvein 

 well developed; cell R, with four pale spots, three spots in a triangle 

 in poststigmatic area, the distal spot large and usually broadly at- 



