Key: Step 505. Tanytarsini 146 Micropsectra

505a. Abdominal segments IV and V each with 4-7 taeniae on each side.

Micropsectra borealis

505b. Abdominal segments IV and V each with 1-3 taeniae on each side.

Step 506. Tanytarsini 147 Micropsectra
Decision path