Stictochironomus, Kieffer, 1919

Konar, Sanghamitra, 2021, A new member of the Stictochironomus caffrarius group from West Bengal, India with emendation of generic diagnosis (Diptera, Chironomidae), Zootaxa 5072 (2), pp. 173-181 : 180

Key to the known male adults of Stictochironomus from the Oriental region

1. Wing without any marking............................................................................. 2

- Wing with markings................................................................................... 3

2. Superior volsella rod-like, nearly straight in dorsal view ( Hazra et al. 2016b, figs. 1, 2)................... S. exterflexus

- Superior volsella curved inwardly in dorsal view ( Chaudhuri et al. 1981, figs. 5c, e)....................... S. flagellatus

3. Wing largely dark brown with pale spots; superior volsella with 1 subapical seta (Yamamoto 2020, figs. 123B).................................................................................................. S. multannulatus

- Wing largely pale yellow with dark spots; superior volsella without apical or subapical setae......................... 4

4. Gonostylus at most twice as long as broad ( Ali et al. 1987, figs. 3a, c, d)................................... S.affinis

- Gonostylus at least 2.5 times as long as broad............................................................... 5

5. Superior volsella much broad at base, gradually tapering toward apex (Blattacharyay et al. 1996, figs. 21, 23; Hazra et al. 2016b, figs. 4, 6, 7, as Polypedilum clavipennae )................................................... S. polystictus

- Superior volsella slender, nearly parallel-sided along entire length of projection.................................... 6

6. Anal tergite with median setae; anal point simple ( Guha & Chaudhuri 1983, figs. 1, 2, as Polypedilum ; Chaudhuri & Chattopadhyay 1990, figs. 41, 43)..................................................................... S. obscurus

- Anal tergite without median setae; anal point bifid apically.................................... S. bengalensis n. sp.