obsoletus and dacne and parvulus

1] Yellow or gray stripe laterally on thorax above wing base..... obsoletus

no such stripe......................................................... 2

2] Hind legs dark; rarely any abdominal pattern; apical spot not

extending beyond 2nd submarginal cell..................... parvulus

Hing legs predominantly yellow or brownish; abdomen with trace

of pale median line, occasional traces of lateral lines;

apical spot usually extends into 1st posterior cell....... dacne

[BG changed my format of the above making it less readable]

Group includes obsoletus, dacne, and parvulus. These are dark flies. The first basal cell (br) is dark, the second (bm) clear. The apical spot is large, covering half of cell r4. The hyaline triangle reaches approximately to R2+3, if only as a thin wedge. The face lacks a yellow pollinose stripe. The frontal callus is dark. The side of the thorax has a yellow stripe, and there may be another above the wing base. The abdomen may have one or three dull, yellow stripes.