Arge pectoralis group - adult #2 - Atomacera decepta
New Hope/Bowman's Hill Wildflower Preserve, Bucks County, Pennsylvania, USA June 26, 2017 Size: ~6 mm
Many adults and larvae of these small sawflies were found on a well-skeletonized plant adjacent to a pond. Photos of several adult specimens and one larva are linked. A photo of the unidentified host plant is included with the larva.