Erebomyia akidoptera Hurley & Runyon

Hurley, Richard L. & Runyon, Justin B., 2009, A review of Erebomyia (Diptera: Dolichopodidae), with descriptions of three new species, Zootaxa 2054, pp. 38-48 : 42-44

Erebomyia akidoptera Hurley & Runyon , n. sp.

( Fig. 3 )

Description. Male: Body length: 3.2 mm; wing: 3.0 mm x 1.25 mm. Head: Face dense gray pollinose; narrowed to diameter of about 4 ommatidia at 1/2, becoming slightly broader below. Vertex blue-green, with moderately dense, rusty-gray pollen which is most dense medially. Ocellar setae long, subequal in size to dc setae. Outer vertical setae three-quarters length of ocellars. Palpus yellow-brown, triangular; with rather long, yellow-brown hairs. Scape cylindrical, shorter than first flagellomere. First flagellomere elongate triangular, twice as long as wide. Thorax: Mesonotum greenish-brown with moderately dense rusty-gray pollen. Pleura blue-green, with moderately dense gray pollen. Metepisternum mostly blue-green; ventral half of metepimeron yellow, dorsal half blue-green. Proepisternum with 2–3 short, white hairs on dorsal half and 2 longer, white setae on ventral half. Thorax with about 11 slender ac, about one-half length of dc. Postpronotals very short. Legs: Coxa I with short, sparse anterior hairs. Coxa II narrowly and diffusely darkened dorsally at base, with long, yellow-brown seta at 1/2; with yellow hairs anteromedially. Tibia II with ad setae near 1/4, 5/ 8; pd seta near 1/3. Tibia III with ad setae near 1/3, 1/2; with row of 5–7 short ventral setae; row of short setae dorsally on apical two-thirds. Ratios of tibia:tarsomeres for leg I: 13-10-6-4 -3-2; for leg II: 18-13-6-4 -3-2; for leg III: 26-6-9-4-2 -1. Wing ( Fig. 3 ): rather narrow with apex broadly acuminate; costa with tuft of 5–7 very short, slightly hooked hairs at apex. M1 undulating beyond posterior crossvein. Abdomen: dark brown, with most of T2 and part of T3 diffusely yellow. T2 laterally with long, slender yellow to brown hairs. Hypopygium (not dissected); cerci relatively short, nearly parallel sided, rounded with 2–3 long yellow setae at apex. Large, hooked left hypandrial arm visible in both unprepared male specimens.

Female: Body length: 3.5 mm; wing: 3.5 mm x 1.75 mm. This is the only species in which the bend in section of M1 beyond crossvein dm-cu occurs distinctly distal to termination of CuA1 at wing margin.

Etymology: Specific name derives from the Greek ɑκιδος (akidos) = point and πτέρον (ptera) = wing, and refers to the pointed apex of the wing in males.

Holotype: 3, CALIFORNIA, labeled: “ U.S. Hwy 101 and Ash Cr., So. Mendocino Co Cal., VI-29-1951, W.C. Bentinck Collector”. Deposited: EMEC.

Paratypes: Ƥ, same data as holotype; 3, CALIFORNIA: Sequoia National Park, VIII-6-1940, D.E. Hardy. Deposited: FSCA (3), EMEC (Ƥ).

Remarks: E. akidoptera appears to be rather widely distributed in California; it is known from the Coast Range north of San Francisco and Sequoia National Park in the southern Sierra Nevada. The type locality is not Mendocino County as on the label, but actually in northern Sonoma County.

Figures

FIGURES 3 – 5. Erebomyia, male wings. 3. E. akidoptera; 4. E. aetheoptera; 5. E. ramseyensis. Note: in wing of E. aetheoptera, the anterodistal and posterobasal margins are slightly bent forward (toward reader).