argenteola Macfie, 1939b: 146 (female). Type locality: Brazil, Santa Catarina, Nova Teutônia). ST F (BMNH). Distr.: Brazil (Rio de Janeiro, Santa Catarina), Argentina (Misiones: Puerto Iguazú, 25°40'S, 54°33'W), Paraguay. Refs.: Marino & Spinelli, 2008: 793.
NEW RECORD:
Misiones: Puerto Iguazú, arroyo Mbocay, 25°37'51.16"S, 54°33'41.46"W.




Diagnosis. Female. Wing length 1.1-1.8 mm. Wing with a small yellow spot at end of costa; costal ratio 0.45; halter pale brownish; thorax brown, scutellum yellowish brown; legs yellowish, hind femur infuscated at ápex, sometimes infuscation continues across knee to base of tibia; fore- and midfemora sometimes slightly darker at tip, but this apparently due to more numerous, broad, striated, brownish scales there than elsewhere on legs; tarsi pale brownish; hind tarsal ratio 0.50-0.55; palpus more slender than in related species with third segment swollen on proximal ½; palpal ratio 3.0; proboscis longer than in related species; mandible with vestigial teeth; abdomen with numerous dark brown, appressed, broad scales; penultimate segment yellowish; spermathecae ovoid, tapering to slender opening without distinct necks. Male. Wing length 1.5 mm. Coloration similar to that of female, dark area on hind femur broader; hind tarsal ratio 0.42; wing pale brownish, veins slightly darker, dark brown on radial field, yellow spot at end of costa prominent; costal ratio 0.40; abdomen yellowish with prominent dark brown segmental bands; genitalia similar of those of F. youngi, brownish except at base of 9th segment and on bases of gonocoxites, which are yellow.