A revision of the genus Aleochara of America north of Mexico is presented. Seven subgenera are redefined with 47 currently recognized species, of which nine are described as new (A. arizonica, A. cavernicola, A. curtidens, A. lobata, A. ocularis, A. nidicola, A. rufobmnnea, A. rufonigra, A. unicolor). The species are arranged according to their relationships into species groups within each subgenus. Sixty-one synonymies are newly established (the first specific name is valid): Subg. COPROCHARA, A. bimaculata Gravenhorst = B. deserticola Casey = B. innocua Casey = B. obsolescens Casey = B. recta Casey; A. notula Erichson = A. duplicata Erichson = B. nanella Casey = B. nitidicollis Casey; A. suffusa (Casey) = B. acuminata Casey = A. verna brundini Bernhauer; A. verna Say = A. alticola Sharp. Subg. XENOCHARA, A. lacertina Sharp = B. salicola Casey = B. imbricata Casey = B. idonea Casey = A. densiventris Bernhauer; A. sallaei Sharp = A. torquata Sharp; A. puberula Klug = B. bipartita Casey; A. fumata Gravenhorst = A. languida Sachse = B. defecta Casey = B. affluens Casey; A. castaneipennis Mannerheim = A. glenorana Casey = B. rotundicollis Casey = B. mannerheimi Casey = B. acomana Casey = B. insulana Casey = B. concurrens Casey = B. eludens Casey = A. oregona Hatch; A. quadrata Sharp = B. uvidula Casey = A. sparsicollis Bernhauer. Subg. CALOCHARA, A. rubripennis Casey = A. rubripes Blatchley = A. wallawallae Hatch. Subg. ALEOCHARA, A. centralis Sharp = A. stygialis Sharp; A. gracilicornis Bernhauer = A. kansana Casey = A. pleuralis Casey = A. americana Casey = A. ellipsicollis Casey; A. lustrica Say = A. pauper Sharp = A. serrata Sharp = A. texana Casey = A. fusicornis Casey = A. sternalis Casey = A. algonquina Casey = A. medialis Casey; A. tahoensis Casey = A. postpicta Casey = A. montanica Casey; A. thoracica Casey = A. collusor Casey. Subg. ECHOCHARA, A. lucifuga (Casey) = A. cavicola (Garman). Subg. EMPLENOTA, A. littoralis (Mäklin) = A. maritima (Casey) = P. arenaria Casey = E. quadrifer Casey = E. trilimbata Casey = E. longiceps Casey. Subg. MASEOCHARA, A. valida LeConte = M. ponderosa Casey = M. robusta Sharp = M. ruficauda Casey; A. opacella (Sharp) = M. hogei Sharp = M. decipiens Casey; A. depressa (Sharp) = M. puberula Casey = M. basalis Casey = M. musta Casey.Ninety-three lectotypes and three neotypes are designated (neotypes are designated for: C. caviola Garman, A. lustrica Say, and A. verna Say).Keys to subgenera and species are provided. All species are described, each illustrated with line drawings and scanning electron microscope photomicrographs, and all available bionomic and distributional data are given. Emphasis was put on host records of those Aleochara species which may be used in biological control of some pest species of Diptera. The systematics and phylogeny of the subgenera and zoogeography of species are discussed.A checklist of Nearctic Aleochara and a table listing the known host records for some species is added.

Rove beetle species and their pitfall trap abundance were studied in red spruce (Picea rubens Sarg.; Pinaceae) stands in the Acadia Research Forest, New Brunswick, Canada, in 1999. The study yielded over 5000 specimens representing 134 species in 11 subfamilies of Staphylinidae. Of these, 58 species represent new distribution records for New Brunswick (NPR), including 15 new distribution records for Canada (NCR), 6 new species, and 4 synonyms, as follows: Omaliinae, 3 species; Proteininae, Proteinus pseudothomasi Klimaszewski sp. nov. (NCR, NPR) and P. acadiensis Klimaszewski sp. nov. (NCR, NPR); Tachyporinae, 3 species; Trichophyinae, 1 species; Aleocharinae, 33 species, including Atheta capsularis Klimaszewski sp. nov., A. brunswickensis Klimaszewski sp. nov., A. pseudocrenuliventris Klimaszewski sp. nov., Oxypoda lacustris Casey (NPR) [= O. bradorensis Lohse syn. nov., O. egestosa Casey syn. nov., O. lassula Casey syn. nov., and O. optiva Casey syn. nov.], and Pella gesneri Klimaszewski sp. nov.; Oxytelinae, 3 species; Paederinae, 3 species; and Staphylininae, 10 species. The new species or known species representing new records for Canada are presented here with a short diagnosis, habitus images, and genital illustrations to help with identification. The habitus images and most genital illustrations are presented here for the first time for these species.

Eight additional adventive aleocharine beetles, native to the Palaearctic region, are reported from Canada, five of them for the first time. They belong to three tribes: Crataraea suturalis (Mannerheim) (Nova Scotia, Saskatchewan, British Columbia) and "Meotica pallens (Redtenbacher)" (Ontario, British Columbia) belong to Oxypodini; Atheta (Chaetida) longicornis (Gravenhorst) (Nova Scotia, Quebec), Atheta (Thinobaena) vestita (Gravenhorst) (New Brunswick), Dalotia coriaria (Kraatz) (Alberta), Dinaraea angustula (Gyllenhal) (Nova Scotia, Prince Edward Island, Quebec, Alberta), and Nehemitropia lividipennis (Mannerheim) (New Brunswick, Nova Scotia, Prince Edward Island, Quebec, Ontario) belong to Athetini; and Homalota plana (Gyllenhal) (Nova Scotia, New Brunswick) belongs to Homalotini. These species have likely been introduced into Canada from Europe by various anthropogenic activities, and their bionomics and possible modes of introduction are discussed. For each species, a short diagnosis and habitus and genital images are provided to assist with identification. The habitus and genital images are presented here for the first time for these species in North America. New United States records are not included in the abstract. 79Résumé-Huit espèces additionnelles de coléoptères aleocharines, originaires de la région Paléarctique, sont rapportées pour le Canada, parmi lesquelles cinq sont mentionnées pour la première fois. Elles appartiennent aux trois tribus suivantes : Oxypodini (2 espèces) -Crataraea suturalis (Mannerheim) (Nouvelle-Écosse, Saskatchewan, Colombie-Britannique), « Meotica pallens (Redtenbacher) » (Ontario, Colombie-Britannique); Athetini (5 espèces) -Atheta (Chaetida) longicornis (Gravenhorst) (Nouvelle-Écosse, Québec), Atheta (Thinobaena) vestita (Gravenhorst) (Nouveau-Brunswick), Dalotia coriaria (Kraatz) (Alberta), Dinaraea angustula (Gyllenhal) (Nouvelle-Écosse, Île-du-Prince-Édouard, Québec, Alberta), Nehemitropia lividipennis (Mannerheim) (Nouvelle-Écosse, Île-du-Prince-Édouard, Nouveau-Brunswick, Québec, Ontario); and Homalotini (1 espèce) -Homalota plana (Gyllenhal) (Nouvelle-Écosse, Nouveau-Can. Entomol. 139: 54-79 (2007)

Atheta vancouveri Klimaszewski, 2002, described from Vancouver Island, is a junior synonym of Pseudota nescia Casey, 1910, described from the Queen Charlotte Islands. The combination Atheta (Pseudota) nescia (Casey, 1910) is proposed.

Abstract-The fauna of introduced rove beetles (Staphylinidae) in the Maritime Provinces ofCanada is surveyed. Seventy-nine species have now been recorded. Of these, 73 have been found in Nova Scotia, 29 on Prince Edward Island, and 54 in New Brunswick. Twenty-five species are newly recorded in Nova Scotia, 16 on Prince Edward Island, and 10 in New Brunswick, for a total of 51 new provincial records. Of these, 15 species, Tachinus corticinus Gravenhorst, Mycetoporus lepidus (Gravenhorst), Habrocerus capillaricornis (Gravenhorst), Aleochara (Xenochara) lanuginosa Gravenhorst, Gnypeta caerulea (C.R. Sahlberg), Atheta (Microdota) amicula (Stephens), Cordalia obscura (Gravenhorst), Drusilla canaliculata (Fabricius), Deleaster dichrous (Gravenhorst), Coprophilus striatulus (Fabricius), Carpelimus subtilis (Erichson), Leptacinus intermedius Donisthorpe, Tasgius (Rayacheila) melanarius (Heer), Neobisnius villosulus (Stephens), and Philonthus discoideus (Gravenhorst), are newly recorded in the Maritime Provinces. Two of these, Atheta (Microdota) amicula and Carpelimus subtilis, are newly recorded in Canada. Leptacinus intermedius is removed from the faunal list of New Brunswick and Philhygra botanicarum Muona, a Holarctic species previously regarded as introduced in North America, is recorded for the first time in the Maritime Provinces. An examination of when species were first detected in the region reveals that, on average, it was substantially later than comparable dates for other, better known families of Coleoptera -an apparent indication of the comparative lack of attention this family has received. Some introduced species appear to be associated with the dry-ballast mechanism of introduction to the continent, while others are synanthropic and may have been inadvertently introduced in connection with agriculture, horticulture, or other processes associated with human activities. A substantial number are now established and well distributed, seemingly indicative of an early introduction into the region, the ability to successfully colonize a habitat and disperse within it, or a combination of these factors. Other species appear to be local in distribution, perhaps indicative of more recent introductions, more restricted ecological tolerances, a lesser ability to disperse, or a combination of these factors. These recent discoveries are discussed briefly in the context of the importance of taxonomic research and ongoing monitoring in order to detect and identify exotic species and monitor for new introductions and changes in existing native or introduced populations -all important in terms of assessing the risk of introductions to, and their impact on, native faunas and habitats. Majka and Klimaszewski 68Résumé-La faune des staphylins (Staphylinidae) introduits dans les Provinces Maritimes du Canada est étudiée. Soixante-dix-neuf espèces ont maintenant été enregistrées. Parmi celles-ci, 73 ont été trouvées en Nouvelle-Écosse, 29 à l'Île-du-Prince-Édouard, et 54 au Nouveau Brunswick. Vingt-cinq espèces sont de nouvelle...

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The Aleocharinae (Coleoptera: Staphylinidae) of Ontario were reviewed in the context of recently studied material, primarily from insect surveys conducted by the University of Guelph Insect Collection (Ontario, Canada). Aleochara daviesi Klimaszewski & Brunke sp. n., Agaricomorpha websteri Klimaszewski & Brunke sp. n., Atheta (Microdota) alesi Klimaszewski & Brunke sp. n., Dinaraea backusensis Klimaszewski & Brunke sp. n., and Strigota obscurata Klimaszewski & Brunke sp. n. are described as new to science. We also report 47 new Ontario records and 24 new Canadian records. Callicerus rigidicornis (Erichson) and Alevonota gracilenta (Erichson) are newly reported from North America as adventive species. A checklist, with Canadian distributions by province, of the 224 species of Aleocharinae known from Ontario is given. The following species are placed in subjective synonymy with Dexiogyia angustiventris (Casey): (Dexiogyia asperata (Casey) syn. n., Dexiogyia abscissa (Casey) syn. n., Dexiogyia tenuicauda (Casey) syn. n., Dexiogyia intenta (Casey) syn. n., Dexiogyia alticola (Casey) syn. n.). The following species are placed in subjective synonymy with Acrotona subpygmaea (Bernhauer): (Acrotona avia (Casey) syn. n., Acrotona puritana (Casey) syn. n.). Lectotypes are designated for Thiasophila angustiventris Casey, Thiasophila asperata Casey, Ischnoglossa intenta Casey, Oxypoda rubescans Casey, Chilopora americana Casey, Chilopora fuliginosa Casey, Coprothassa smithi Casey, Atheta subpygmaea Bernhauer, Colpodota puritana Casey, Strigota seducens Casey, Trichiusa compacta Casey, Trichiusa hirsuta Casey and Trichiusa robustula Casey.

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