Taxon classification Animalia Coleoptera Staphylinidae

Stenus (Stenus) difficilis Casey, 1884

Material examined.

New Brunswick, Saint John Co., Dipper Harbour, 45.1169°N, 66.3771°W, 7.VII.2006, R.P. Webster // Margin of salt marsh, in seepage area, treading (2 ♂, 1 ♀, RWC); same locality and collector but 45.1182°N, 66.3790°W, 28.V.2010 // Upper margin of salt marsh, in grass litter (sifted) in seepage area with Carex & Spartina patens (1 ♂, 2 ♀, RWC).

Distribution in Canada and Alaska.

AB, SK, ON, QC, NB (Bousquet et al. 2013).

Natural history.

In NB, Stenus difficilis was found along the margins of salt marshes. Specimens were collected in grass litter in seepage areas with Carex and Spartina patens (Ait.) Muhl. (salt-meadow grass) by treading or sifting vegetation. Adults were collected in May and July.