Cryptarcha concinna Melsheimer, 1853

Carleton Co.: Jackson Falls, Bell Forest, 46.2199°N, 67.7232°W, 12.IV.2007, R.P. Webster, hardwood forest, in leaf litter at base of tree (1, RWC) ; York Co.: Charters Settlement, 45.8395°N, 66.7391°W, 20.VII.2006, 23.VII.2007, 1.VIII.2007, R.P. Webster, mixed forest, m. v. light, (3, NBM, RWC) .

In Canada this species is recorded from British Columbia east to Québec and Nova Scotia (McNamara 1991; Majka and Cline 2006), and in the United States from Massachusetts south to Florida and west to California and Oregon (Parsons 1943). In Nova Scotia it is found associated with red oak ( Quercus rubra L., Fagaceae) and red maple ( Acer rubrum L., Aceraceae).