BITING MIDGES — WIRTH AND BLANTON 431 



The debiltpalpis group 



This group consists of small species with dark brown mesonotum, 

 rarely with prominent pattern; wing with small round spots, one or 

 two m distal part of cells R^ and M,, and only one spot in distal parts 

 of cell M2 and anal cell, all far from wing margin; apices of veins dark; 

 antenna with flagellar segments in one series of gradually increasing 

 lengths, no break between segments x and xi, sensoria present on 

 segments iii, and vii or viii to x; four tibial spines; two spermathecae ; 

 male genitalia with ventral root of basistyle foot-shaped, paramere 

 with simple basal knob and fringed apex; aedeagus with subapical 

 or apical sclerotized points, these often remarkably developed. 



Panama species: Ten: aureus Ortiz, debilipalpis Lutz, gabaldoni 

 Ortiz, ginesi Ortiz, glabrior Macfie, hofmani Fox, imitator Ortiz, 

 mirsae Ortiz, paracusis (Goeldi), and spurius, new species. 



71. Culicoides gabaldoni Ortiz 



Figure 74 



Culicoides gabaldoni Ortiz, 1954, Arch. Venezolana Patol. Trop. Parasit. Med., 

 vol. 2, p. 221 (female; Venezuela; fig. wing, antenna, palpus, spermathecae)! 



Culicoides germanus Wirth (misident., not Macfie), 1955, Proc. Ent. Soc. Wash- 

 ington, vol. 57, p. Ill (male, female; Guatemala; fig. male genitalia). 



Female: Length of wing 0.65 (0.55-0.79, n=14) mm. 



Head.— -Eyes broadly separated, with long interfacetal hairs. An- 

 tenna with flagellar segments in proportion of 18:9:10:11:11:11:12: 

 14:13:12:16:17:25, antennal ratio 0.91 (0.85-0.96, n=9); distal 

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

 proportion of 6:14:16:5:9, third segment moderately swollen, 1.8 

 (1.7-2.1, n=13) times as long as greatest breadth, with a small, very 

 deep sensory pit. Mandible with 11 (10-15, n=13) teeth. 



Thorax.— Mesonotum very dark brown with bluish gray pruinosity, 

 with pattern of two sublateral, narrow, blackish vittae. Scutellum,' 

 postscutellum and pleuron dark brown. Legs pale brown, hind 

 femur darker; fore and mid femur with subapical, all tibiae with 

 subbasal and hind tibia with apical, broad pale bands; hind tibial 

 comb with four (n=12) spines, the one nearest the spur longest. 



Wing.— Pattern as figured, the two poststigmatic pale spots in cell 

 R5 fused into a single quadrate pale area extending nearly to vein 

 Ml, with the posterior portion of the area usually extending slightly 

 distad of the anterior portion, distal pale spot in cell R5 large and 

 rounded, nearly filling space between anterior wing margin and vein 

 Mi; two pale spots in cell Mi; one pale spot each in apices of cell M2, 



