Subject: An Elegant looking fly
Location: Andover, NJ
June 1, 2015 4:50 pm
I spotted this insect which I believe is some sort of fly on my storm door over the weekend. It is near what appears to be an exuvia, perhaps its own? The insect was between 1/2 and 3/4 inch in length with very striking wing patterns. Not a great shot, but hopefully shows enough detail for an ID.
Your help is always most appreciated!
Signature: Deborah E. Bifulco
Flies do not emerge from exuvia, a term that usually applies to the shed skin of a nymph. The only insects that have wings on the exuvia are Mayflies, which have an initial molt into a winged subadult, quickly followed by a second molt. Flies emerge from puparia. We believe what you have mistaken for an exuvia is a dead insect, but we are unsure which insect. We quickly identified your Common Snipe Fly as Rhagio mystaceus, which as luck would have it, was one of the first images we found on BugGuide when attempting the identification. There is no real information on BugGuide, and the information on iNaturalist is limited to the physical description.
Thank you very much for the ID, as well as the great info re the exuvia. It makes more sense that it is a dead insect, especially with the wings. I should have known that!