Key: Step 131. Chironomini 28 Demicryptochironomus

131a. Tergites IV and V without antero-median point patches. Pedes spurii B II absent.

Demicryptochironomus schachti

131b. Tergites IV-VI with antero-median point patches. Pedes spurii B II present.

Step 132. Chironomini 29 Demicryptochironomus
Decision path