Materials.
CANADA: ON: Essex Co., Windsor, ~1.5km S Ojibway Prairie, forest-prairie edge, malaise trap, 15-V to 1-VI-2001 , S. Paiero (1); Windsor, ~1.5 km S Ojibway Prairie, private prairie, malaise, 5 to 12-VI-2001 , S. Paiero (3); Windsor, ~1.5km S Ojibway Prairie, private prairie, malaise, 19 to 30-VI-2001 , P. Pratt (2); Hald. -Norfolk Reg., Charlotte 2 Rd., ~480m E of Charlotteville, West Quarterline Rd., 'C.C.S.N. -5', purple prism trap, 13 to 19-VI-2009 , S.M. Paiero (1); HaltonReg ., Milton, Derry Rd. and 4th Line, under composter, 16-X-2008 , S. M. Paiero (1); Oxford Co., Woodstock, trails nr. river, 14-VI-2008 , S.A. Marshall (1). Simcoe Co., Midhurst, forest nr. Neretva St., 28-IX-2008 , A. Brunke and K. Brunke (1); Wellington Co., Guelph, University Campus, dairy bush, dry Polyporus squamosus , 22-IX-2008 , A. Brunke (1).
Diagnosis.
Quedius cruentus may be distinguished from other northeastern Quedius by the combination of: elytra evenly punctate; labrum distinctly bilobed; eyes distinctly shorter than temples; antennomeres one to three distinctly paler than others; distal antennomeres strongly transverse; pronotum with sublateral row of punctures longer than dorsal row.
This Palaearctic species was first detected by Gusarov (2001) based on a specimen collected in New York. Hoebeke (2008) newly reported Quedius cruentus from Maine, Massachusetts, New Jersey, Ohio, Pennsylvania, and Québec , and established its presence in North America as early as 1983 in New York. Herein we newly report this species from Ontario (Map 36). In its native range, Quedius cruentus is widely distributed in the Palaearctic region ( Smetana in Löbl and Smetana 2004 ). Quedius cruentus has been found in a variety of habitats in Ontario including forests, prairies, urban greenspace under loose bark, under objects and in decayed fungi.
