Stictochironomus flagellatus (Chaudhuri, Guha and Dasgupta, 1981) Comb. n.

Polypedilum (P.) flagellatum Chaudhuri, Guha and Dasgupta, 1981: 122; Hazra, Niitsuma and Chaudhuri, 2016: 89.

Material examined. 3 males labelled ‘ Polypedilum flagellatum Chaudhuri, Guha and Dasgupta, 1981, India, West Bengal, Duars, Birparah (26.70, 89.13), Coll. T. Dutta, 21.vi.1984 ’.

Description. Wing. R 2+3 separated from R 1; R 4+5 and M bare; squamal setae 10–14.

Hypopygium. Apical setae of inferior volsella 10–14; median setae of T IX 1–13.

Remarks. After careful examination of the specimens we found that T VIII is not basally constricted; anterior and posterior tibial combs of fore and hind legs are not separate and inferior volsella is bent laterad. Based upon the mentioned characters we have come to the conclusion that the species belongs to the genus Stictochironomus . The superior volsella of the species is unique among the species of the genus.