Penthetria anthracina (Heer, 1849)

(Figs. 1, 19–20)

Protomyia anthracina Heer, 1849: 236 .

Plecia anthracina (Heer) Loew, 1868: 184 .

Penthetria anthracina (Heer) Handlirsch, 1907: 960 .

Type material: Syntype (female) GBA 2009/016/0176. Probable syntype (female) GBA 2009/016/0207. Other material: 1 female, NHMW . 1 female, NHMW 1937 (no. 23) II.104 (labeled as Bibio fusciformis Heer),

4 females, CNHM (1830, 1841, two without catalogue number). Heer mentioned seven specimens from «k.k. montan. Cabinet» .

Male unknown

Female: Total length 8.4–11.9 mm (N=6).

Head: Length 0.78–1.21 mm (N=5), width 0.84–1.15 mm (N=3). Oval. Complex eye not protruding. Antennal flagellum slender, probably 8- or 9-segmented.

Thorax: Length 2.5–3.4 mm (N=5), width 2.1–2.4 mm (N=3). Halter black.

Wing (Figs. 19–20): Length 8.2–11.5 mm (N=5), width 3.2–4.6 mm (N=5), length/width = 2.5–2.8 (N=4, one wing = 3.1 but probably a bit compressed). Long and narrow, entirely black fumose. The wings extend considerably beyond apex of abdomen. Veins strong, distinctive throughout. Humeral vein not apparent, costal cell rather wide, subcosta fine but distinctive, straight. Costa extends to apex of R 4+5. Pterostigma not apparent. R 2+3 originating just basad to apex of R 1, relatively long and horizontal. Medial veins distinctive, apically straight. CuA 2 very strong and conspicuous, apically straight. CuP straight. Vein measurements: Subcosta 5.3–7.5 mm (N=4), basal R 2.6–3.1 mm (N=5), distal R 1 3.3–4.8 mm (N=5), basal R s 1.4 –2.5 mm (N=5), distal R s 0.6 –1.1 mm (N=5), R 2+3 2.6–3.5 mm (N=5), R 4+5 3.9–4.5 mm (N=5), R–M 0.32–0.44 mm (N=5), basal M 2.7–4.9 mm (N=5), distal M 0.7–1.5 mm (N=5), M 1 3.3–4.2 mm (N=5), M 2 2.7–3.6 mm (N=5), M-Cu 0.30–0.41 mm (N=4), CuA 2.4–3.5 mm (N=5), CuA 1 3.9–4.9 mm (N=5), CuA 2 2.8–3.6 mm (N=5).

Legs: Black, slender. Length of fore femur 1.9–3.2 mm (N=4), fore tibia 2.1–2.9 mm (N=3), hind femur 3.0– 4.1 mm (N=3), hind tibia 2.8–4.1 mm (N=2).

Abdomen: Length 5.6–8.0 mm (N=5), width 1.7–2.7 mm (N=5).