PeterO on Apr 25, 2007April 25th, 2007, 4:34 am EDT
This is actually a specimen of the family Taeniopterygidae, probably Taenionema atlanticum. Notice the large sternal plate at the apex of the abdomen. This plate is used in drumming behavior. Adult Taeniopterygids mimic the sounds of male Ruffed Grouse in an attempt to draw in female grouse to parasitize. They attach themselves at the base of the beak and feed until gorged. They then mate, smoke a cigarette, lay some eggs, and die. On a serious note, all Taeniopterygids except species of Taeniopteryx, have the drumming plate. Nemourids are lacking this feature. There is a difference in the second tarsal segment as well. Happy Bugging!
Troutnut on Apr 25, 2007April 25th, 2007, 7:55 am EDT
Well, I didn't buy the whole grouse story. I assume the part about the stonefly drumming in some way is true, though, since plenty of other insects do that. What does it really sound like, or is it not audible to people?
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
PeterO on Apr 25, 2007April 25th, 2007, 8:30 am EDT
it's not audible to the human ear. I have heard some recordings of drumming though. Taeniopterygids are known for it, but I also think some Perlodids and Chloroperlids might as well. Podmosta is a western Nemourid. Prostoia is very common in Tompkins county, especially in smaller, cooler creeks like Sixmile. You can also find Soyedina in the area. It's larger, and has a squarish pronotum with a lateral notch. I've collected it in Salmon Creek at Ludlowville. Those are really the only two Nemourids you're going to encounter with any regularity.