370 PROCEEDINGS OF THE NATIONAL MUSEUM VOL.109 



44. Culicoides guyanensis Floch and Abonnenc 



Figure 47 



Culicoides guyanensis Floch and Abonnenc, 1942, Inst. Pasteur Guyane Terr. 

 rinini, no. 37, p. 5 (male, female; Cayenne, French Guiana; fig. male, 

 female wings, antenna, palpus, male genitalia). — Barbosa, 1947, Anais 

 Soc. Biol. Pernambuco, vol. 7, p. 19 (Panama, Trinidad, Brazil; fig. male 

 genitalia; synonyms, recifensis Barbosa, stubalensis Fox). 



Culicoides stellifer Macfie (not Coquillett, misident.), 1937, Ann. Mag. Nat. 

 Hist., vol. 20, p. 12 (female; Trinidad). 



Culicoides recifensis Barbosa, 1943, Rev. Bras. Biol., vol. 3, p. 261 (female; 

 Brazil; fig. wing). 



Culicoides stubalensis Fox, 1946, Ann. Ent. Soc. Amer., vol. 39, p. 254 (female; 

 Trinidad; fig. wing, mesonotum). 



Female: Length of wing 0.99 mm. 



Head. — Eyes narrowly separated, bare. Antenna with flagellar 

 segments in proportion of 16:14:14:15:15:15:15:15:20:20:22:25:34, 

 antennal ratio 1.0 (0.99-1.1, n = 2); distal sensory tufts present on 

 segments iii, vi-x. Palpal segments in proportion of 9 : 23 : 27 : 10:13, 

 third segment moderately swollen, 2.4 (2.1-2.6, n = 3) times as long 

 as greatest breadth, with a broad, shallow sensory pit. Mandible 

 with 15 teeth. 



Thorax. — Mesonotum densely pruinose gray, with a prominent 

 pattern consisting mainly of a sublateral pair of broad brownish 

 bands; a median area on anterior margin between humeral pits 

 blackish. Scutellum narrowly brown in middle, j^ellowish on sides; 

 postscutellum and pleuron dark brown. Legs brown; femora with 

 bases broadly pale; all femora with subapical, tibiae with subbasal 

 and hind tibia with apical narrow pale rings; hind tibial comb with 

 four spines, the one nearest the spur longest. 



Wing. — Pattern as figured; second radial cell very dark; yellowish 

 area over r-m crossvein extending broadly to costal margin; cell R5 

 with five small round, separate, pale spots spread from base to apex 

 of cell; apices of veins Mi, M2 and M3_4 with a small pale spot at 

 wing margin; three pale spots in cell Mj, the distal one meeting wing 

 margin; two pale spots in distal part of cell M2, the distal one meeting 

 wing margin ; pale spot in cell M4 broadly meeting wing margin ; one 

 small round pale spot in distal portion of anal cell and a large pale 

 area anteriorly at base of cell; cell M2 with a pale spot behind medial 

 fork and one at half the length of the mediocubital stem; pale spot 

 just distad of basal arculus. Macrotrichia fairly numerous on 

 distal half of wing and a few in anal cell; costa extending to 0.58 of 

 distance to wing tip. Halter with base of knob brownish. 



Abdomen. — Dark brown, cerci yellowish. Spermathecae two, pyri- 

 form, subequal, measuring 0.050 by 0.034 mm. and 0.050 by 0.029 mm., 

 the bases of the ducts sclerotized a considerable distance. 



