Key: Step 177. Chironomini 74 Chironomus

177a. Smaller: length not exceeding 6mm; abdomen colourless with sooty markings. Thoracic granulation well developed anteriorly and along suture, evanescent elsewhere. Spur of segment VIII with one or two robust teeth. Segment VIII with 4 lateral taeniae. (Pleura IV quite densely spinulate.)

Chironomus longipes

177b. Larger: over 6mm long; golden-brown to dark brown. Thoracic granulation usually extensive. Spur of segment VIII with 1-6 robust teeth. Segment VIII with 5 lateral taeniae.

Step 178. Chironomini 75 Chironomus
Decision path