Erebomyia exalloptera Runyon & Hurley

(Figs. 1–2, 6–7)

Description. See Runyon & Hurley (2004) for habitus photo. Male: Body length: 4.0– 4.5 mm; Wing 3.5–4.0 mm x 1.75–2.0 mm. Head: Face dense gray pollinose; narrowed to width of 1 ommatidium or less just above midpoint, wider above and below. Vertex blue-green, to brownish-green, with some magenta reflections; with moderately dense gray pollen. Ocellar setae long, subequal in length to dc setae. Outer vertical setae twothirds length of ocellars. Palpus yellow-brown, somewhat elongate, rounded apically; with long, slender, yellow-brown setae. Scape cylindrical, slightly longer than first flagellomere; mostly yellow, often partly brownish. Pedicel mostly yellow, often slightly brown. First flagellomere (Fig. 2) short triangular, a little longer than wide; somewhat rounded apically. Thorax: Mesonotum dark brown, with green/blue reflections; with moderately dense gray to brownish-gray pollen. Pleura blue-green with sparse gray pollen. Metepisternum and metepimeron largely yellow. Proepisternum with 2–3 short, white hairs on upper half, and 2 long white setae on lower half. Thorax with 8–12 slender ac, length about one-third of dc. Postpronotal hairs well developed, relatively long. Legs: Coxa I with moderately dense, yellow anterior hairs. Coxa II with bluegreen color of pleura continued onto extreme base dorsally, and diffusely along ad edge. Tibia II with ad setae at 1/3, 2/3; with pd seta near 1/3. Tibia III with ad seta near 1/3, sometimes also at 2/3; with row of 5–7 short ventral setae; row of short setae dorsally on apical two-thirds. Ratios of tibia:tarsomeres for leg I: 24-17-8-5 - 4-2; for leg II: 30-21-9-6 -3-2; for leg III: 42-9-14-7 -4-2. Wings (Fig. 1): asymmetrical; both broad with apex mucronate; with branches of R2+3 and R4+5 crowded towards anterior edge; with R4+5 ending well before apex; M1 undulating beyond posterior crossvein. Right wing excavate posterior to apex, left larger and wing smoothly convex; crossvein dm-cu occurring more distal in left wing. Costa with short, stiff spines, especially between R2+3 and M1; with cluster of 3–5 minute hairs at apex. Abdomen: dark brown, with extensive yellow on T2, usually T3, and sometimes on T4. T2 with long, slender setae over entire surface (longest laterally). Hypopygium (Figs. 6–7); cerci broad at base, narrowed on apical two-thirds, with 2–3 long yellow setae at apex.

Female: Body length: 3.75–4.5 mm; wing: 3.5–4.25 mm x 1.5–2.0 mm. The following characters should separate females of this species: femur III with preapical anterior seta greater than or equal to width of femur at insertion; wing rather narrow (length distinctly greater than 2 times width); bend in section of M1 beyond crossvein dm–cu occurring at or just basal to termination of CuA1 at wing margin.

Remarks: E. exalloptera is known from two sites in southeastern Arizona: Madera Canyon in the Santa Rita Mountains and Wet Canyon in the Pinaleno Mountains (see Discussion).