Key: Step 161. Chironomini 58 Chironomus

161a. Anterior shagreen band of sternite III continuous or narrowly broken medially. Paratergite I ventrally with shagreen restricted to posterior 3rd or absent.

Chironomus tentans

161b. Anterior shagreen band of sternite III widely broken medially. Paratergite I shagreened for the whole length.

Chironomus pallidivittatus
Decision path