Key: Step 309. Chironomini 206 Polypedilum

309a. Anterior transverse band of points on tergite II widening laterally and spreading posteriorly at each side for a short distance (not very obvious in some specimens) (124h.jpg).

Polypedilum convictum

309b. Anterior transverse band of points of tergite II narrowing laterally, not extended posteriorly on each side (124d.jpg).

Polypedilum pe10
Decision path