The "other" sulphur

[DO_inthewoods]

Saw these sporadically hatching on Blue Marsh Lake the other evening. Obviously thinking a generic sulphur, but on investigating later there were only two tails.

Our common sulphurs are of the Ephemerella genus and should be 3 tailed. However, would the two tails more likely make this a Epeorus vitreus which I have read can be called an orange sulphur depending on the region.

 

[CLSports]

Cahill maybe?

 

[DO_inthewoods]

Cahill maybe?

Actually a great point! I found this old thread and with the wings being mottled more likely a cahill, possibly a "cream cahill." (stenacron vs maccaffertium)

 

[dc410]

I’d say some variety of Cahill. Sulphur wings are dun colored.