This hind wingless little mayfly was formerly known as Pseudocloeon futile and can hatch in excellent numbers in certain western locales. Where & When
» Species futilis (Tiny Blue-Winged Olive)
Region:Caucci and Nastasi report in Hatches II that large Rocky Mountain spring creeks have excellent hatches of this species.
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Recent Discussions of Apobaetis futilis
Possible ID 2 Replies »
In searching for nymphs in my small stream in northern Maryland, 500 yards from the PA line, I came across a 2 tailed mayfly that was not a of the Epeorus genus. Reply
It was in a fast riffle section along with Epeorus nymphs. This was about 3/8” in overall length including tails. Darker straw coloration with dark brownish black wing cases that were pronounced in color and shape. Biggest factor was the tails. Median caudal filament was truncated, very small compared to the outer pair. Not even sure if tail/ caudal filament should be used to describe. In my books the closest thing is the Pseudocloeon futile. Which is an old taxonomic name I’m finding out.
This find seems rare in my area and experience. Hopefully I can get a photo...
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