BITING MIDGES — WIRTH AND BLANTON 319 



Distribution: Panama; Mexico, Nicaragua. 



Specimens examined: Holotype female, Mojinga Swamp, Canal 

 Zone, Dec. 11, 1951, F. S. Blanton, light trap (USNM 63159). Allo- 

 type male, Las Palmas, Veraguas Province, July 1953, F. S. Blanton. 

 Paratypes, 2 males, 23 females: Panama: 7 females, Mojinga Swamp, 

 Canal Zone, Aug. 28, Oct. 24, 1951, May 7, 1952; 1 male, 1 female, 

 Loma Boracho, Canal Zone, Oct. 23, 1951, July 1952; 6 females, 

 Almirante, Bocas del Toro Province, November 1952 to January 1953; 

 1 female. El Valle, Code Province, Dec. 22, 1953; 1 male, Rio Hato, 

 Code Province, Aug. 3, 1952; 1 female, Pina, Colon Province, Jan. 18, 

 1954; 1 female, Punta Patino, Darien Province, July 1952; 3 females, 

 Isla Taboga, Panama Province, Dec. 10, 11, 1953; 1 female, Las 

 Palmas, Veraguas Province, July 1953. Mexico: 1 female, Tapa- 

 chula, Chiapas, Sept. 20, 1944; B. Brookman, light trap. Nicara- 

 gua: 1 female, Villa Somoza, July 14, 1953, P. Galindo, hght trap. 



Discussion: This species has a wing pattern similar to that of 

 iriartei Fox, but can be distinguished by the crescent-shaped distal 

 pale spot in cell R5 of the wing, by the presence of only one small 

 pale spot bordering vein Mi, two pale spots in the distal portion of the 

 anal cell, by the brown mottlings in addition to the large patches in 

 the mesonotal pattern, and by the different arrangement of antennal 

 sensoria. The sensorial distribution and the characters of the male 

 genitalia of crescentis indicate that this species is closely related to 

 daedalus Macfie and antefurcatus, new species, in the daedalus group. 



22. Culicoides daedalus Macfie 



Figure 25 



Culicoides daedalus Macfie, 1948, Ann. Trop. Med. Parasit., vol. 42, p. 83 (male; 

 Chiapas, Mexico; fig. wing, genitalia). — Ortiz and Mirsa, 1952, Rev. Sanid. 

 Asist. Soc, vol. 17, p. 277 (male; Venezuela; fig. wing, palpus, antenna, 

 genitalia). 



Culicoides sp., Ortiz, 1951, Rev. Sanid. Asist. Soc, vol. 16, p. 583 (female; Vene- 

 zuela; fig. wing, palpus, antenna, spermathecae) . 



Female: Length of wing 1.01 (0.92-1.09, n = 5) mm. 



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

 proportion of 20:17:15:14:15:14:14:15:31:32:32:35:45, antennal 

 ratio 1.34 (1.30-141, n=3); distal sensory tufts present on segments 

 III, xi-xv. Palpal segments in proportion of 12:25:30:11:9, third 

 segment moderately swollen, 2.0 (1.9-2.1, n = 6) times as long as 

 greatest breadth, with a large, deep, sensory pit opening by a slightly 

 smaller pore. Mandible with 13 (12-13, n=5) teeth. 



Thorax. — Mesonotum pruinose gray with a prominent, reticulated 

 pattern of blackish brown patches consisting of a narrow median 

 anterior band, a pair of sublateral bands and irregular marks near 



