About the only information I could find on this little Syrphid fly was that it is a beneficial insect. It's larvae are aphid predators. Females lay their eggs in aphid colonies. A BugGuide image shows a female ovipositing on an aphid.
BugGuide: Species Ocyptamus fuscipennis
BugGuide: Genus Ocyptamus
This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License.
.
