This is an ID partially based on gestalt resulting from seeing lots of specimens. The shorter/broader proportions for B. champlaini separate it from B. rubrica - as does size, which isn't really discernible in this image. Then, the coloration separates it from B. vagans. While vagans and champlaini are both variable in color, the elytral color of vagans is never fully orange, as in this specimen.… Robert Androw (Collection Manager at the Carnegie Museum of Natural History in Pittsburgh, PA)
Restricted Access: Camp Edwards, Sandwich, MA
https://bugguide.net/node/view/2139341
https://www.inaturalist.org/observations/247414391