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Hmm :unsure:

Convention calls for the scientific name to appear in italics, for the genus to start with a capital letter, and for the species to start with a lower-case letter, as in Hexagenia limbata. ;)

I believe this male subimago of family Heptageniidae, and to (probably) be Cinygma dimicki. If I am correct, then its common name would be Western Light Cahill.

Bingo;)

Hi Tom- I submitted your excellent photo to BugGuide, just to verify that the opinions I had expressed earlier were accurate. This was the response.

Yes, they are. Please see the Alderfly page on my website.

Alderfly larva

Bingo

Thanks, Tom. Based on it having emerged from the Touchet River, it is probably more likely to be Ameletus celer than it is to be Ameletus vernalis. Please see: WA Mayfly Distribution - By County. Then, click on the blue hyperlink for Columbia County,

Hi Tom- Rather than being of genus Rhitrogena, I believe this male subimago to be of genus Ameletus, perhaps (but not necessarily) Ameletus vernalis. From which county, and what date did it emerge?

Different states have different taxes, but all of them can all be counted on to tax us. ;)

Hi Steve, The most obvious difference (in their winged lifestages) is the number of tails. A BWO would have only 2 tails, whereas a Trico would have 3 tails.

Hi Steve- The mayfly female subimago pictured above is not generally referred to as a BWO, but rather, as a Trico. I believe it to have the scientific name of Tricorythodes explicatus. Incidentally, that is one fantastic photo.

Hi Gary- Yes, probably Macromia magnifica.

Me too.:)

I suspect that it's a Chironomid pupa.

Ah, well at least I recognized the new looking green pontoon covers. Re: Best pontoon ever! I certainly agree! ;)

Hmm. I suspect it may be a slow leak through the valve. Don't recall whether (or not) the valve is replaceable, but if not, perhaps you could try cleaning with it with sone mild hand soap. Another suggestion would be to attempt contacting BDD from the old forum, as I sold another Xstream...

Hi Bambooflyguy- Wow, this is the first time I've seen a photo of your Xstream since I sold it to your friend. And after all these years it still looks like new; simply amazing! Hope you are enjoying it as much as I did.