276 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io9 



Distribution: Venezuela; Honduras; Panama; Peru; Trinidad. 



Panama records: 

 Canal Zone: Albrook Field, Fort Kobbe (horse trap), Fort Sherman, Loma 



Boracho, Madden Dam. 

 CHiRiQuf Province: David, Tortugas, Volcdn. 

 CocLi! Province: El Valle, Penonom6. 

 Panama Province: Cerro Campana, Tocumen. 



Discussion: The synonymy of rozeboomi Barbosa with heliconiae 

 was made by Wirth and Blanton (1956) after a comparison of the 

 respective holotypes. This species has been reared at least three 

 times from water-holding plants such as Heliconia in Venezuela (Fox, 

 1942), Honduras (Fox, 1948) and Trinidad (Wirth and Blanton, 1956). 

 It is one of those species most frequently taken in stable traps and 

 must be very strongly attracted to horses, unlike its close relatives 

 hylas Macfie and verecundus Macfie. 



2. Culicoides hylas Macfie 



Figure 5 



Culicoides hylas Macfie, 1940, Ent. Monthly Mag., vol. 76, p. 26 (female; British 

 Guiana; fig. wing). — Wirth and Blanton, 1956, Journ. Washington Acad. 

 Sci., vol. 46, p. 98 (male, female; fig. wing, palpus, spermathecae, parameres). 



Female: Length of wing 1.19 (0.99-1.29, n=24) mm. 



Head. — Eyes contiguous, bare. Antenna with flagellar segments 

 in proportion of 25:20:20:20:20:20:20:22:30:30:37:39:53, anten- 

 nal ratio 1.12 (1.06-1.15, n=5); distal sensory tufts present on seg- 

 ments III, xi-xv. Clypeus not elongated, bases of palpi arising at 

 level of ventral eye margins. Palpal segments in proportion of 

 8:30:50:23:17, third segment slightly swollen, 3.1 (2.6-3.6, n=17) 

 times as long as greatest breadth, with shallow subdivided pit, which 

 is often completely divided into two, small, separate, round pits. 

 Mandible with 19 (17-21, n=26) teeth. 



Thorax. — Dark brown, mesonotum with median area yellow and a 

 pair of brownish black, broad, sublateral vittae; humeri blackish. 

 Legs brownish black; fore and mid knee spots black, with adjacent 

 narrow yellow rings on femora and tibiae, hind femur entirely dark, 

 hind tibia with narrow pale rings at base and apex; hind tibial comb 

 with six spines, the second from the spur longest. 



Wing. — Pattern as figured, apices of veins M, and Mj and in some 

 specimens ends of veins M3+4 and Cu, pale, and pale spot in cell M4 

 not continued proximad along vein M3+4, extent of other pale markmgs 

 somewhat variable. Macrotrichia fairly numerous in apices of cells 

 Rg, Ml and M2 and very sparse in cell M4 and anal cell; costa extending 

 to 0.68 of distance to wing tip. Halter whitish. 



