Albert Co.: Shepody National Wildlife Area, Mary’s Point Section, 45.7320°N, 64.6765°W, 16.VI.2004, R.P. Webster, on flowers in spruce forest, (8, NBM, RWC); Carleton Co.: Belleville, Meduxnekeeg Valley Nature Preserve, 46.1965°N, 67.6803°W, 31.V.2005, M.-A. Giguére & R.Webster, old field, sweeping (5, NBM, RWC); York Co.: Fredericton, 45.9110°N, 66.6686°W, 4.VI.2004, R.P. Webster, sweeping roadside vegetation near black spruce bog, (7, NBM, RWC).
Heterhelus sericans has been recorded in Canada from British Columbia, Ontario, Québec, Nova Scotia, and Newfoundland ( McNamara 1991; Majka and Cline 2006), and in the United States from Maine south to North Carolina and Tennessee, and west to Kansas and Wisconsin ( Parsons 1943; Chandler 2001; Price and Young 2006). In Nova Scotia specimens were principally collected in deciduous forests associated with blossoms of Sambucus racemosa L. ( Caprifoliaceae), Diervilla lonicera, P. Mill. ( Caprifoliaceae), Prunus virginiana L. ( Rosaceae), Crategus spp ( Rosaceae), and Cornus alterniflora L.f. ( Cornaceae) ( Majka and Cline 2006); also reported from Aristolochia sp. ( Aristolochiaceae) (A. Cline, pers. obs.).