"S. canadensis is a common species in [Maryland], but it is hard to distinguish from S. cristatus based on images. The latter prefers colder climates so probably most if not all the MD records of Symmorphus on BugGuide will refer to canadensis, except for those from the Appalachian ranges. S. cristatus should be more common there" (Matthias Buck/BugGuide, 6/23/2018).
There are 28 records in the project database.
GA | AL | WA | FR | CL | MO | HO | BA | BC | HA | CE | PG | AA | CV | CH | SM | KE | QA | CN | TA | DO | WI | SO | WO |