230 SMITHSONIAN MISCELLANEOUS COL1.ECTIONS VOL. I25 



SIMULIUM (SIMULIUM) PARRAI Vargas, Martinez, and Dfaz 



SimuHum (Simuliwn) parrai Vargas, Martinez, and Diaz, Rev. Inst. Salubr. 

 Enferm. Trop., vol. 7, No. 3, pp. 151-153, 175-176, figs. 98-105 and 150, 1946 

 (original description, ?, c? genitalia, pupa, and larva). — Vargas and Diaz, 

 ibid., vol. 9, No. 4, pp. 336-337, 1948 (external characters of c^). — Dalmat, 

 Ann. Ent. Soc. Amer., vol. 44, No. i, pp. 55 and 57, 1951 (presence and 

 distribution in Guatemala). 



Male (pi. 26, figs. 88-90). — 2.8 mm. long. 



Head: Holoptic. Eyes yellov^ish brown. Antenna 510 /* long, ii- 

 segmented, slightly tapering ; segment 3<i-t-2, 3<4+5, 3>ii; scape 

 and pedicel light brown, the flagellum black. Palpi black. Clypeus 

 black, white-pruinose, irregularly covered with long black hairs. 



Thorax : Mesonotum velvety black ; with wide band of white prui- 

 nosity around the periphery, interrupted only at the middle of the 

 anterior margin where 2 arms are formed that are directed toward the 

 center of the scutum; long, narrow, yellow, scalelike hairs covering 

 entire mesonotum, not in packets ; short black hairs over entire meso- 

 notum, long black ones in prescutellar region. Humeral angles black, 

 white-pruinose, with golden scalelike hairs. Scutellum black, with 

 yellow scalelike hairs and with long black ones. Postnotum velvety 

 black, white-pruinose, devoid of hairs. Pleura dark brown to black, 

 with white pruinosity. Stem of halter dark brown, the knob tan. 

 Wings, 2.6 mm. long and 1.2 mm. wide; relation of body length to 

 wing, I.I : I ; Sc pilose along basal seventh ; Ri pilose and spiny along 

 distal half; R2+3 pilose along distal four-fifths; Cuo arcuate; discal 

 cell absent. 



Legs: Leg i, length, 2.7 mm.; coxa and trochanter light brown; 

 femur and tibia dark brown ; tarsus black. Leg 2, length, 2.4 mm. ; 

 coxa dark brown ; trochanter light brown ; femur dark brown ; tibia 

 dark brown with very small tan basal ring ; basal half of basitarsus 

 tan, the apical half black ; tarsal segments 2-5 black. Leg 3, length, 

 2.9 mm. ; coxa black ; trochanter and femur dark brown ; tibia dark 

 brown with very small basal tan ring ; basal half of basitarsus and of 

 second segment tan, the remainder of these segments, as well as all 

 of segments 3-5, black; relation of basitarsus to second segment, 

 5.1 : I ; calcipala well developed, reaching the pedisulcus ; pedisulcus 

 well formed one-third the distance from the base of second segment. 



Abdomen: Tergite of segment i black with short black hairs; 

 pleurites black with long black hairs that reach the fifth segment. 

 Seo-ment 2 black, the anterior half white-pruinose, with short black 

 hairs. Other segments black, pleura partially white-pruinose, with 

 short black hairs. Sternites black, white-pruinose. 



