I think either Dasysyrphus venustus or D. laticaudus - it depends whether the yellow maculae on tergites 3-4 reach the edge of the abdomen (D. venustus) or don't (D. laticaudus). I unfortunately can't tell from this image what's happening there.

If they do reach the edge, then we can rule out D. limatus (since the maculae on tergite 2 are large) and D. intrudens species complex (since the maculae are not strongly lunate/arcuate, not constricted in the middle, and not quite swollen at the medial edge), leaving only D. venustus, who has similar maculae to this fly.

If they don't reach the edge, we rule out D. lotus, D. richardi, and D. creper since they don't curve upwards (as in D. creper) and don't meet or nearly meet in the middle, and none of these species occur in MA. We rule out nigricornis based on location. We rule out D. amalopis and D. occidualis since the maculae aren't strongly constricted in the middle. D. pauxillus and D. pacificus are western species with similar markings to this fly. That leaves us with D. laticaudus, which has the very outside edge of the maculae on tergite 2 projected slightly upwards (very slightly).

So... venustus or laticaudus, depending on what happens at the edge of the abdomen.

Eric is right in that he thinks this is not Scaeva. Another feature in the genus Scaeva is the more or less swollen forehead, giving it a bit of a bulging look. However this is sometimes a bit difficult to see with a picture from above like this! This picture shows a female in the genus Dasysyrphus. It has haired eyes, a shiny thorax and an abdomen which is oval and weakly but distinctly marginated with distinctive yellow markings.
Greetings,
Gerard Pennards

Boy, I don't know that is what this is. Please don't ask me why I disagree:-) For one thing, it appears to have 'too many stripes' to be Scaeva pyrastri. The stripes at the base of the abdomen in particular lead me to believe this is something else. Scaeva generally has three pairs of bold, white (never yellow) crescents on a very black abdomen.