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Species Details
Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum Read more about this collection »
SeasonalityThis species has been collected in July and August.
IdentificationMember of the chalybeus group, with large head and short elytra, each eltron with at least 4 complete, punctate striae, elytra more or less iridescent. Piceous, outer margin of elytyra and oftern entire prothorax, brown, appendages paler but antenae more or less infuscated as a rule. Microsculpture on disc of prothorax open, forming evident meshes, slightly iridescent. Hind angles of prothorax more or less denticulate. Outer elytral striae obliterating, 5th more or less interrupted. Length 3.7-4.8 mm.
Scientific Name
Trechus chalybeus
Habitat
Often among dead leaves under Salix and Alnus; open grassland; near snow patches.
Seasonality
This species has been collected in July and August.
Identification
Member of the chalybeus group, with large head and short elytra, each eltron with at least 4 complete, punctate striae, elytra more or less iridescent. Piceous, outer margin of elytyra and oftern entire prothorax,…
Member of the chalybeus group, with large head and short elytra, each eltron with at least 4 complete, punctate striae, elytra more or less iridescent. Piceous, outer margin of elytyra and oftern entire prothorax, brown, appendages paler but antenae more or less infuscated as a rule. Microsculpture on disc of prothorax open, forming evident meshes, slightly iridescent. Hind angles of prothorax more or less denticulate. Outer elytral striae obliterating, 5th more or less interrupted. Length 3.7-4.8 mm.
Life History
May overwinter in both larval and adult stages.
Conservation
Common.
Diet Info
Both larvae and adults are predatory.
Range
This species is found in western United States and Canada. In Alberta this species is found from central Alberta south in the western regions.
Citation
Page Citation for Trechus chalybeus
Page Citation
"Species Details - Trechus chalybeus, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-2978/9-265869. Accessed 26 Apr. 2025.
References
Author
Bousquet, Yves and Andre Larochelle
Title
Catalogue of the Geadephaga (Coleoptera: Trachypachidae, Rhysodidae, Carabidae Including Cicindelini) of America North of Mexico
Publication Date
1993
Series Title
Memoirs of the Entomological Society of Canada
Pages
1-397
Author
Lindroth, Carl H.
Title
The Ground-beetles of Canada and Alaska. Part 3.
Publication Date
1963
Series Title
Opuscula Entomologica
Volume
24
Pages
201-408
Specimen Information
There are 454 specimens of this Species.
UASM35531 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35532 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35533 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35534 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35535 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35536 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35537 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35538 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35539 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35540 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35541 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35542 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35543 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35544 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35545 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35546 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35547 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35548 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35549 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35550 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02
UASM35551 - Trechus chalybeus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Jasper National Park, Meadow Creek
Collected ByBall, G. E.
Date Collected1956-08-02