Contributions to the faunistics and bionomics of Staphylinidae (Coleoptera) in northeastern North America: discoveries made through study of the University of Guelph Insect Collection, Ontario, Canada Author Brunke, Adam J. Author Marshall, Stephen A. text ZooKeys 2011 75 29 68 http://dx.doi.org/10.3897/zookeys.75.767 journal article http://dx.doi.org/10.3897/zookeys.75.767 1313-2970-75-29 Tachinus corticinus (Gravenhorst, 1802) Materials. UNITED STATES: MA: Middlesex Co., Groton, 22-IV-2010, T. Murray (1). Diagnosis. Tachinus corticinus is easily distinguished from congeners in northeastern North America by the combination of: pronotum and elytra lacking microsculpture; pronotum with at least borders paler than head; female tergite eight with all lobes of similar size; male sternite seven without apical lobes; small size (3.00-3.75 mm from clypeus to apex of elytra). This exotic species was first collected in North America in St. Cyrville, Quebec in 1967 and was first recognized in North America by Campbell (1975) . Since then it has been detected in Vermont, Pennsylvania ( Byers et al. 2000 ), Nova Scotia ( Schuelke 2006 ), New Brunswick, Prince Edward Island ( Majka and Klimaszewski 2008a ) and Ontario ( Brunke et al. 2009 ). Herein we record it as new for Massachusetts (Map 9). Tachinus corticinus is widespread in the Palaearctic region ( Smetana in Loebl and Smetana 2004 ) and has been collected in a variety of open and forested habitats. Although most individuals captured in Hannover, Germany were brachypterous ( Assing 1992 ), Levesque and Levesque (1995) found that nearly all individuals captured in Quebec raspberry fields were fully winged. All specimens deposited in DEBU were found to be brachypterous but fully winged individuals do exist in Ontario as Tachinus corticinus was captured in small numbers in raised pan traps (A. Brunke unpublished data). Maps 9-12. Distribution in northeastern North America, sources of data other than DEBU are quoted in parentheses. 9 Tachinus corticinus (Gravenhorst) ( Campbell 1975 , Levesque and Levesque 1995 , Byers et al. 2000 Majka and Klimaszewski 2008a , Brunke et al. 2009 ) 10 Tachyporus browni Campbell ( Campbell 1979 , Klimaszewski et al. 2005 ) 11 Tachyporus ornatus Campbell ( Campbell 1979 ) 12 Bledius neglectus Casey ( Herman 1976 , Majka et al. 2008 ).