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Species Details
Dyschirius quadrimaculatus
University of Alberta E.H. Strickland Entomological Museum Read more about this collection »
SeasonalityThis species has been collected in May, June and August.
IdentificationMember of the quadrimaculatus group, clypeus with two blunt median teeth. Pale yellowish brown, more or less piceous ventrally, elytra about middle with a transverse dark cloud (slightly metallic) which usually extends along the suture from base to apex; shoulder region and apex always pale; prothorax often with a similar cloud on dis; antennae entirely yellow. Elytron with 3 dorsal punctures adjacent to 3rd stria, anterior puncture large; 1 subhumeral fovea; and 2 preapical punctures. Length 3.3-4.0 mm.
Scientific Name
Dyschirius quadrimaculatus
Habitat
On steep river banks of sand-mixed clay lacking vegetation.
Seasonality
This species has been collected in May, June and August.
Identification
Member of the quadrimaculatus group, clypeus with two blunt median teeth. Pale yellowish brown, more or less piceous ventrally, elytra about middle with a transverse dark cloud (slightly metallic) which usually…
Member of the quadrimaculatus group, clypeus with two blunt median teeth. Pale yellowish brown, more or less piceous ventrally, elytra about middle with a transverse dark cloud (slightly metallic) which usually extends along the suture from base to apex; shoulder region and apex always pale; prothorax often with a similar cloud on dis; antennae entirely yellow. Elytron with 3 dorsal punctures adjacent to 3rd stria, anterior puncture large; 1 subhumeral fovea; and 2 preapical punctures. Length 3.3-4.0 mm.
Life History
No information available.
Conservation
Moderately rare.
Diet Info
Both larvae and adults are predatory.
Range
This species is found on the northern central plains of United States, and on the prairie region of Canada. In Alberta this species is known from the southern third, and one locality near Flatbush, north of Edmonton.
Citation
Page Citation for Dyschirius quadrimaculatus
Page Citation
"Species Details - Dyschirius quadrimaculatus, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-2523/9-28701. Accessed 19 Mar. 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 2.
Publication Date
1961
Series Title
Opuscula Entomologica
Volume
20
Pages
1-200
Specimen Information
There are 23 specimens of this Species.
UASM353753 - Dyschirius quadrimaculatus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Medicine Hat
Collected ByCarr, F. S.
Date Collected1926-06-27
UASM353754 - Dyschirius quadrimaculatus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Medicine Hat
Collected ByCarr, F. S.
Date Collected1920-06-14