Beckidia Saether

Zorina, Oksana V., 2006, New species and records of Beckidia Saether (Diptera: Chironomidae) from the Russian Far East, Zootaxa 1151, pp. 47-53 : 48

Key to Holarctic males of Beckidia Saether

1. Legs green; superior volsella about 3 times as wide at apex as at base ............................ ......................................................................................... B. zabolotzskyi (Goetghebuer)

­ Legs yellowish brown; superior volsella less than twice as wide at apex as at base .... 2

2. Total length 5 mm; AR 2.71; acrostichals present; dorsolateral part of superior volsella without microtrichia ( Figs. 1–2 ) .............................................. B. biraensis new species

­ Total length 3.2–3.5 mm; AR 1.6–1.8; acrostichals absent; superior volsella covered with microtrichia ........................................................................................................... 3

3. Tergites I–IV (V/VI) with brown, transverse band along distal margin; superior volsella fused with inferior volsella; gonostylus widest at about apical one­third ( Figs. 3–5 ) ........................................................................................... B . connexa new species

­ Abdomen yellowish; superior volsella partially fused with inferior volsella; gonostylus widest medially ( Figs. 6–7 ) ......................................................... B. tethys (Townes)

Figures

FIGURES 1 – 7. Male imagines of Beckidia biraensis new species (1 – 2), Beckidia connexa new species (3 – 5) and Beckidia tethys (Townes) (6 – 7). 1, 3, 6. Hypopygium. 2, 5, 7. Superior and inferior volsella. 4. Anal point. Scale bars: 50 m.