Key: Step 238. Chironomini 135

238a. Comb of segment VIII a row of narrow elongate teeth set on the edge of a semicircular pad on the apico-lateral corner of the segment (108i.jpg; 108k.jpg). (The teeth may be bluntly rounded at the apex, and an occasional tooth may occur further forward between the bases of lateral taeniae 3 and 4.) Note Ci135 (108g.jpg; 108j.jpg)

Step 239. Chironomini 136 Cyphomella

238b. Comb of segment VIII, if present, not as above.

Step 240. Chironomini 137
Decision path