Sarcophaga (Bulbostyla) semimarginalis Hall

(Figs. 32–39)

Sarcophaga semimarginalis Hall 1931: 283 .

Sarcophaga (Neobellieria) semimarginalis: Pape (1996: 367) .

Type material: holotype ɗ labelled ‘Menard Tex. / 15–24–VII–1929 ’; ‘E. C. Cushing / Collector’; ‘ Type No. / 43867 / U.S. N.M.’; ‘ Sarcophaga / semimarginalis Hall’ (USNM). Paratype ɗ, same data as holotype except 11–21.vii.1930, Parish collector (not examined).

Other material examined: USA: Arizona: Graham Co., Cyclone Hill, 3.3 mi w. on Hwy. 366 from Hwy. 191, ca. 4000', 23.viii.1993 (3ɗ, CNC); Texas: Big Bend N.P., Santa Elena can., 5.v.1959, 2100' (3ɗ, CNC); Jeff Davis Co., Davis Mts St. Pk., 25.viii.1968 (10ɗ, GD); same data except 23.viii.1968 (1ɗ, GD); Bexar Co., 29.ix.1936 (1ɗ, CNC); Presidio Co., 11.vii.1929 (1ɗ, 1Ψ, CNC); MEXICO: Nuevo Leon: Monterrey, 20.x.1953 (1ɗ, FSCA); Mamulique Pass 2km., NE on microwave rd., 17–18.vi.1982, 2000', dry wash (1ɗ, GD).

Description (male): body length 9.0–12.0 mm.

Head: 8–11 pairs of medioclinate frontal setae. Genal setae black, postgena mostly white-haired, black setae restricted to posterior part of postgena.

Thorax: proanepisternum bare.

Wing: dark hairs on lateral margin of alula as long as those on anterior margin of anal lobe. Hairs fringing calypters creamy-white.

Legs: hind tibia with long, wavy posteroventral hairs.

Abdomen: tergite 5 same color as other abdominal tergites or with pale brown or orange-yellow margin on apical half or third, with a marginal row of strong setae, sometimes two middle (dorsal) ones slightly anterior to the others.

Terminalia: cerci and syntergosternite 7+8 same color as epandrium. Surstylus without a small posteroventral projection. Window on sternite 5 almost even with rest of base. Pregonite usually without pointed lateral extension, weak if present.Vesica as in Figs. 32, 34. Juxta with two deep invaginations in posterior view (Fig. 33).

Female: body length 10.0 mm.

Terminalia (Fig. 39): tergite 6 with moderately strong setae on each side evenly spaced and about equal in size. Tergite 7 present. Tergite 8 vestigial. Sternite 6 with 9 moderately strong setae on posterior margin. Sternite 7 desclerotized on middle part, with 7 weak setae on posterior margin.