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Species Page - Quedius laevigatus
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scientific name    Quedius laevigatus    

Species lives under bark of dead trees with an apparent preference for coniferous trees (Smetana, 1971).

Adult specimens in the Strickland Museum collected from early July to late August.

Species is between 5.5 and 9.0 mm and is black in coloration with the elytra, palpi, base of antennae, and apex of abdomen usually brownish red in color (Smetana, 1971). The pronotum and abdomen are nearly iridescent with the sides of the pronotum parallel and the sides of the elytra being longer than the midline of the pronotum (Smetana, 1971). The eyes are separated by more than twice their length (Hatch, 1957), are prominent and convex, and the temples are at most the length of the eyes (Smetana, 1971). The abdominal tergites are comparatively densely punctuated, however the first distinctly visible tergite is almost impunctate at the midline (Smetana, 1971).

life history
Species coloration and size characteristics are extremely variable. North American specimens commonly exhibit an entirely black morph with some regions containing only the black morph of the species (Smetana, 1971). Larvae are a parasitic host of Exallonyx obsoletus (Hymenoptera: Serphidae) (Hoebeke and Kovarik, 1988).


diet info
The adult is a predator of a variety of bark beetle larvae (Smetana, 1971).

A holarctic species with wide distributions in both the nearctic and palearctic regions. Within Alberta the specimen has been collected as far north as Edmonton, and in the montane regions of the province.

Quedius plagiatus Mannerheim is considered a synonym of Quedius laevigatus (Smetana, 1971)

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Comments (1)Add New Comment

Adam Brunke (2010-02-19)
Quedius plagiatus is the correct name for this species as laevigatus was found later to be occupied.

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References (3)
Specimen Info
There are 13 specimens of this species in the online database
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Adult Seasonal Distributioncreate a collection histogram with specimens
Specimen List (13)


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