Key: Step 279. Chironomini 176 Stictochironomus

279a. Sternite I with a posterior transverse rugosely tuberculate band, medially broken, with a dark mark at each end (117k.jpg).

Stictochironomus pe2

279b. Sternite I with the central area armed with spinulate points (117f.jpg).

Step 280. Chironomini 177 Stictochironomus
Decision path