Further contributions to the staphylinid fauna of New Brunswick, Canada, and the USA, with descriptions of two new Proteinus species (Coleoptera, Staphylinidae) Author Webster, Reginald P. Author Davies, Anthony E. Author Klimaszewski, Jan Author Bourdon, Caroline text ZooKeys 2016 573 31 83 http://dx.doi.org/10.3897/zookeys.573.7830 journal article http://dx.doi.org/10.3897/zookeys.573.7830 1313-2970-573-31 23B3E2C9EA734934A83D4512681E2967 Taxon classification Animalia Coleoptera Staphylinidae Astenus americanus (Casey, 1905) Material examined. New Brunswick, Charlotte Co., 5.2 km NW of Pomeroy Ridge, 45.3087°N , 67.4362°W , 5.VI.2008, R.P. Webster // Red maple swamp, in leaf litter and in near vernal pool (1 ♂, RWC). Northumberland Co., 12 km SSE of Upper Napan [Goodfellow Brook P.N.A.], 46.8943°N , 65.3796°W , 7.VI.2006, R..P. Webster // Eastern white cedar swamp, in moss & leaf litter (1 ♂, RWC). Saint John Co., Chance Harbour off Rt. 790, 45.1355°N , 66.3672°W , 15.V.2006, R.P. Webster // Calcareous fen, in sphagnum & litter in depressions with Carex (1 ♂, RWC). York Co., Charters Settlement, 45.8428°N , 66.7279°W , 15.IV.2005, R.P. Webster // Mixed forest, small sedge marsh in moist grass litter (1 sex undetermined, RWC); same locality and collector but 45.8267°N , 66.7343°W , 16.IV.2005 // Carex marsh, in litter & sphagnum at base of tree (2 sex undetermined, RWC); New Maryland, off Hwy 2, E of Baker Brook, 45.8760°N , 66.6252°W , 6.IV.2005, 26.IV.2005, R.P. Webster // Old-growth cedar swamp, in moss & litter at base of cedar (1 ♂, 1 sex undetermined, RWC); Canterbury, trail to Browns Mtn. Fen, 45.9033°N , 67.6260°W , 2.V.2005, M. Giguere & R. Webster // Mixed forest with cedar, margin of vernal pond in moist leaf litter (1 sex undetermined, RWC); Rt. 645 at Beaver Brook, 45.6840°N , 66.8679°W , 3.V.2008, R.P. Webster // Red maple/alder swamp, and in moist leaves near small vernal pool near small stream (1 ♂, RWC). Distribution in Canada and Alaska. ON, QC, NB ( Bousquet et al. 2013 ). Natural history. Astenus americanus was found in moist leaf litter, sphagnum and leaf litter, and in moist leaves on the margin of a vernal pond in forested wetlands. These included a red maple swamp, eastern white cedar swamps, mixed forests with cedar, a red maple/alder swamp, and a small sedge marsh in a mixed forest. Some individuals were found in a calcareous fen and a Carex marsh. Adults were collected in April, May, and June.