Chironomidae Exuviae
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Chironomidae Exuviae
Key: Step 321. Chironomini 218 Polypedilum

321a. Fringe of the anal lobes continued around the apex of the lobe and forward internally (122f.jpg). 128 hooks in the hook row of segment II. (Thoracic horn about 16-branched.)

Polypedilum pe3

321b. Fringe of anal lobes extending only to the tip of the lobe externally. Fewer than 80 hooks in the hook row of segment II.

Step 322. Chironomini 219 Polypedilum
Decision path