Key: Step 128. Chironomini 25

128a. Tergite II posteriorly with a transverse band of points medially broken by a narrow point-free space; from the posterior band points may spread forwards either as diverging marmorate patches or as narrowly separated longitudinal bands joined anteriorly (097g.jpg; 097i.jpg). Tergites III-V with the longitudinal patches more extensive, but always separate posteriorly. (Note Ci025)

Step 129. Chironomini 26 Demicryptochironomus

128b. If the tergite armament is paired posteriorly, then the tergites also have conspicuously strong points anteriorly.

Step 133. Chironomini 30
Decision path