Myriophora bimaculata sp. nov.

(Figs 2.2, 9.9, 15.9, 22.2)

Diagnosis. Female. The spots on abdominal tergite 3 are a translucent light brown color with a brown outline, and the long axes of the spots are directed laterally (Fig. 22.2), making this species easily recognizable.

Description. Female (Fig. 2.2). Body length 2.84 mm. Head: Frons dusky yellow, with 1 pair of supraantennal setae; supra-antennals originate above lower interfrontal setae. First flagellomere yellow, slightly pointed under arista. Palpus yellow, normal sized. Labrum prominent, enlarged. Labellum normal sized. Thorax: Scutum dusky yellow. Scutellum dusky yellow. Pleuron yellow; anepisternum with a few setulae. Forefemur yellow. Midfemur yellow. Hind femur yellow. Wing length 2.45 mm (Fig. 9.9); costal vein normal; costal length 1.56 mm; mean costal ratio 0.64. Knob of halter brown. Abdomen: Tergites 1 and 2 contrasting, yellow anteriorly, brown posteriorly; tergite 2 with strong, distinct setae on lateral margin. Tergite 5 contrasting, yellow anteriorly, brown posteriorly; posterior setae on tergite 5 short. Tergite 6 greatly narrowed posteriorly; posterodorsal setae on segment 6 equal in length to posteroventral setae. Venter of abdomen with sparse short setae. Oviscape (Fig. 15.9) weakly laterally compressed; division between membrane and sclerites clearly defined; sclerites light brown; membrane lightly colored with conspicuous brown striations.

Distribution. Known only from Sacha Lodge, Ecuador.

Host. Unknown.

Etymology. An adjective from Latin for "two-spotted" referring to the two distinct spots present on the dorsum of abdominal tergite 3.

Holotype. ♀, ECUADOR: Sucumbios: Sacha Lodge, 0.5°S, 76.5°W, 270m, 24.v–3.vi.1994, P. Hibbs, Malaise trap [LACM ENT 038148].