Maps 1–4.
Distribution in northeastern North America, sources of data other than DEBU are quoted in parentheses. 1 Omalium repandum Erichson (Blatchley 1910, Campbell and Davies 1991, Lundgren 1998) 2 Porrhodites fenestralis (Zetterstedt) (Campbell 1984) 3 Ischnosoma flavicolle (LeConte) (Campbell 1991) 4 Sepedophilus campbelli Herman (Campbell 1976, Watrous 2008).