BITESTG MIDGES — WIRTH AND BLANTON 395 



swollen with very low ventral lobe, distal portion tapered to relatively 

 stout, pointed, simple apex. 



Distribution: Brazil; Panama. 



Panama records: 



BocAS DEL ToRO PROVINCE: Almirante. 



Canal Zone: Fort San Lorenzo, Fort Sherman, France Field, Galeta Point, 



Loma Boracho, Mojinga Swamp. 

 CniRiQuf Province: Alanje. 



CocLf; Province: Puerto Farall6n, Puerto Obaldla. 

 Col6n Province: Cativd, Pina. 



Dari6n Province: El Real, Garachin6, Punta Patifio. 

 Los Santos Province: Guarar^, La Palma, Las Tablas, Puerto Mensab6. 

 Panama Province: ArraijAn, Camar6n, Panamd Vieja, Pedregal, Venado Beach, 



Vique Cove. 



Discussion: This species is closely related to lyrinotatus Wirth 

 and Blanton, both species having the distinctive division of the pale 

 spot over the r-m crossvein into two separate pale spots. The two 

 species agree also in many other less conspicuous details including 

 the general wing pattern, but lyrinotatus can readily be distinguished 

 by the wheel-like design of the pale wing spots and the dark crossvein, 

 while the four-leaf-clover design of the anterior mesonotal spots will 

 distinguish reticulatus from all other known species. The male 

 parameres of reticulatus greatly resemble those of mojingaensis and 

 azureus. 



55. Culicoides macrostigma Wirth and Blanton 



Figure 58 



Culicoides macrostigma Wirth and Blanton, 1953, Journ. Parasit., vol. 39, p. 230 

 (male, female; Panama; fig. wing, palpus, male genitalia). 



Female: Length of wing 0.91 (0.83-0.96, n = 9) mm. 



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

 in proportion of 15:8:9:9:10:10:11:12:28:28:29:29:48, antennal ratio 

 1.97; distal sensory tufts present on segments iii, viii-x. Palpal 

 segments in proportion of 9:14:20:9:10, third segment swollen, 1.8 

 (1.6-2.0, n = 8) times as long as greatest breadth, with a large deep 

 sensory pit opening by a small pore. Mandible with 11 (9-12, 

 n=9) teeth. 



Thorax. — Mesonotum dark chocolate brown, with prominent 

 pattern of pruinose gray patches consisting of a pair of elongate, 

 submedian spots, a pair of small humeral spots, and two pairs of 

 rounded lateral spots, one on each side of lateral suture. Scutellum 

 brown in middle, pruinose gray on the sides; postscutellum and 

 pleuron dark brown. Legs dark brown; fore and mid femora with 



