Bibio enterodelus Unger, 1841

(Figs. 9–10, 28–30)

Bibio enterodelus Unger, 1841: 428 .

Bibio lividus Heer, 1849: 223 . Syn.n.

Type material: Holotype Bibio enterodelus (female) (SLJG 77425). Heer mentioned just a single specimen of Bibio enterodelus . Holotype Bibio lividus (female) (GBA 2009/016/0691). Heer (1849: 224) mentioned one specimen from “Cabinet zu Wien” which is currently in GBA.

Additional material: One female (CNHM 1838).

Description

Male unknown.

Female: Total length 15.0– 15.2 mm (N=2).

Head (Fig. 29): Length 1.7 mm (N=2). Brown. Antenna rather slender. Ocellar tubercle prominent.

Thorax: Length 5.1 mm (N=1). Brown, probably faded colour. Halter light brown.

Wing (Fig. 28): Length 12.3–12.7 mm (N=3), width 4.0– 4.4 mm (N=3). Light brownish, veins apparently concolourous with membrane. Relatively slender. Veins rather strong and prominent. Basal R s 1.6 –2.0* as long as R-M. Fork of M relatively short, M-veins apically straight. Crossvein Bm-Cu meets M 2 slightly beyond fork of M. CuA 2 apically strongly curved. Vein measurements (N=3): Subcosta 6.3–6.6 mm, basal R 3.8–4.9 mm, distal R 1 2.4–2.6 mm, basal R s 1.1 –1.5 mm, distal R s (=R 2–5) 5.4–6.0 mm, R-M 0.4–0.8 mm, basal M 3.7–4.6 mm, distal M 0.8–1.0 mm, M 1 4.5–4.9 mm, M 2 3.6–3.8 mm, M-Cu 0.6–1.2 mm, CuA 2.4–2.8 mm, CuA 1 4.5–5.7 mm, CuA 2 3.3–4.5 mm.

Legs: Fore femur (Fig. 29) length 3.1 mm, width 0.8 mm (N=1). Hind femur (Fig. 30) length 4.0– 4.7 mm, width 0.8–0.9 mm (N=2), hind tibia length 4.5 mm, width 0.5 mm (N=1).

Abdomen: Length 9.7–12.0 mm (N=2), width 3.6 mm (N=1). Pale brown, cylindrical.

Discussion: The holotype specimen of Bibio lividus is rather uniformly brown except that the tibiae are darker, not coloured like the recent species Bibio hortulanus as claimed by Heer (1849: 223). The colour is unlikely to be original.