Materials.
CANADA: PEI: Brackley Beach, National Park, milieu marécageux (=marshy environment), 2-VIII-1979 , R. Sexton (13).
Diagnosis.
This species can be easily distinguished from other northeastern Philonthus by the combination of: pronotum with punctures widely distributed and not in rows; legs and antennae completely dark; head with hind angles indistinct (Fig. 11).
Philonthus vulgatus was previously known from Alaska, Alberta, British Columbia, Idaho, Illinois, Indiana, Iowa, Kansas, Maine, Manitoba, Massachusetts, Michigan, Minnesota, Montana, Nebraska, New Hampshire, New York, North Dakota, Nova Scotia, Ontario, Québec , Saskatchewan, South Dakota, Utah, Washington, and Wisconsin ( Smetana 1995 ). Herein we newly report this species from Prince Edward Island (Map 34). Philonthus vulgatus is a hygrophilous species that has been collected in beaver lodges, at lights, and along water margins in debris or emergent vegetation ( Smetana 1995 ).
