A first comprehensive synopsis of all aleocharine rove beetle species (Coleoptera
Staphylinidae) recorded from eastern Canada from Ontario to the Maritime Provinces inclusively
is presented. Four hundred and seven species in 96 genera and 16 tribes are presented and
discussed.Tribes and subtribes are arranged in presumably phylogenetic order as it is currently
recognized. Genera and subgenera are listed alphabetically. Species are listed alphabetically
or in species groups to better reflect their relationships. Species distribution is listed by
abbreviated provinces and territories in Canada and abbreviated states in the United States.
Geographic status is given to every species as Native Holarctic or adventive with some species
listed with undetermined status - adventive or Holarctic. Every treated species is presented
with a diagnosis including short description of body and description of the median lobe of
aedeagus spermatheca and tergite and sternite VIII of both sexes. For each species a plate
with colour habitus image and black and white images of genital structures is provided to aid
with positive identification. Collection and habitat data (often new) are presented for each
species including data on macrohabitat microhabitat collecting period and collecting
methods.
