Key: Step 237. Chironomini 134 Nilodorum

237a. Anterior transverse band of strong points present on tergite II only (108l.jpg). Anal lobes with the taeniate fringe continued around the inner margin as bristle-like setae.

Nilodorum brevibucca

237b. If tergite II has an anterior transverse band of strong points, so have tergites III-VI. If the fringe of the anal lobes is continued around the inner margin, it remains taeniate.

Step 238. Chironomini 135
Decision path