Baestiscidae or Baetidae?

Probably something in Heptageniidae

This is a subimago, as indicated by the fringe of hairs around the rear edge of the forewing (best seen in the third photo). The dark-margined crossveins in the forward half of the forewings are seen in the subimagos of several heptageniid genera, but not in Baetidae, which usually have solid-colored wings or wings with pale crossveins (as in many Callibaetis), or Baetiscidae, which usually have dark patches or bands. Baetids have hindwings that are variously minute, threadlike, or absent. Baetiscids have an enlarged thorax that gives them a unique humpbacked look, large round hindwings, and a wavy trailing edge on the forewings.

… Lloyd Gonzales, 8 September, 2009 - 10:13pm

Leucrocuta hebe?

Lloyd-

I had also concluded Heptageniidae, perhaps Leucrocuta hebe.

… Roger Rohrbeck, 9 September, 2009 - 1:43am

Roger...

The wings do look somewhat similar to Leucrocuta. However, the lack of the typical dorsal markings and the prominence of the lateral angles along the forward part of the abdomen seem problematic. I had also considered less common genera like Macdunnoa, which might be more consistent with the apparent absence of dorsal markings, but I'm afraid I'm stuck at family.

… Lloyd Gonzales, 9 September, 2009 - 8:32am

Moved

Moved from ID Request.

… v belov, 8 September, 2009 - 6:36pm