Maps 21-24 from: Brunke A, Marshall S (2011) 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. ZooKeys 75: 29-68. https://doi.org/10.3897/zookeys.75.767

Maps 21-24 - Distribution in northeastern North America, sources of data other than DEBU are quoted in parentheses. 21 Erichsonius brachycephalus Frank (Frank 1975, 1981a, Chandler 2001) 22 Erichsonius nanus (Horn) (Frank 1975, 1981a, Sikes 2003, Klimaszewski et al. 2005) 23 Erichsonius parcus (Horn) (Frank 1975, Chandler 2001) 24 Gabrius amulius Smetana (Smetana 1995).