Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Yapank, Suffolk County, New York, USA
August 2, 2009
If I had to guess, I'd say caddisfly but I would put any money on it.

Images of this individual: tag all
IMG_9538 IMG_9538

how about
a female Leptocerus americanus - the wings seem too pointed for Mystacides.

Leptocerus americanus would explain the apparent pointiness of the wings. However, I usually expect to see that species with grayish brown palps and grayish brown wings with areas of dark and light hairs scattered throughout. Here, the palps and wings appear basically black to me. Have you seen live Leptocerus with wings that dark and plain, Dave?

My explanation of the pointy wings would be that they are not quite face on to the camera. Consider this photo. Granted, the image is of the European species azurea, but it is the clearest example I could find. Although the wings are folded in the typical Mystacides resting fashion, notice how pointed the tips appear when they are angled to the camera.

Floyd - the photo you have linked to is a good example. You can see the typical fold in the Mystacides wing. The ability to fold the wing (or perhaps it is not an ability but rather a result) is because of an unusual apical constriction of the veins on the costal margin. I cannot figure out how to attach a quick photo I took to show the basic structures and how the fold occurs from this costal "notch," along the anastamosis to the arculus. If you have Ross 1944, or Schmid 1980, 1996 you can easily see the "notch" in their Mystacides wing figures and, along with your image, imagine how the fold occurs. The "notch" is very obvious and the costal margin of the specimen in question is very clear and does not have this "notch".

Regarding the dark specimens - I don't see many live L.americanus, not common out here. But I have dark specimens from several localities. The dark grey of the specimen in question does not seem to me to be the same magpie black of Mystacides.

Thanks, Dave
Malcolm Storey's (UK) website has a number of excellent images. Unfortunately, his shots of M. azurea (azureus?) do not include the detailed images of fore (and hind) wings that are included in some of his other specimen selections. However, he does provide such images for M. longicornis. I'll take a look at those to see if they might provide a good example of the costal notch you mention.

EDIT: An image of the M. longicornis forewing showing the "notch" at the arculus that Dave mentioned can be seen here. This European (Palearctic) species is very similar to our M. interjectus.

I took two shots. One was a little under exposed and the other was over exposed. I used the under exposed image, since it was sharper, and made a guess when I corrected for exposure based on experience. I used my nephews camera as mine was put away and have no idea what setting he was using. I may have added to much contrast.

I checked the BOLD web site and found images of Leptocerus americanus here which actually do look similar. Take a look at image #741233 in particular.

Moved from ID Request.

Well now, I guess I should have had more faith in my convictions. I actually shot a couple images of Mystacides sepulchralis earlier that night. This may even be the individual. Is there anything I can do look for to on this photo to make a fairly positive ID?

You could try enlarging the tip of the abdomen. Although all of the green-bodied individuals of this species that I have seen were females, I do have reasonably good images of the terminal parts of either sex for comparison. Otherwise, the overall appearance, palps, antennae, and collection date all fit.

No Good
I looked at the image at full res but it doesn't give any greater detail so I won't bother you with a blow up of what you can already see. I'll leave the image at the family level. That's better than I expected given I wasn't even sure of in what order it belonged.

Thanks for the help!

This unusual photo appears to be of Mystacides sepulchralis. When resting with the wings closed, they fold the tips of their forewings inward like the flaps of a tent.

i would...