Species - Scolytus unispinosus

Taxonomic Hierarchy for University of Alberta E.H. Strickland Entomological Museum


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Scolytus unispinosus

University of Alberta E.H. Strickland Entomological Museum

Common NameDouglas-fir engraver SeasonalityAdults emerge from late June to August, but some adults have been noted to have emerged in May (possibly due to favourable developmental conditions). IdentificationAdult beetles are 2.6 to 3.5 mm long with black stout bodies (Bright 1976). In both males and females, the abdominal sternite is not concaved, but rather ascends vertically to meet the elytra (which extend over the abdomen) (Bright 1976). A median tubercle may be found on the 2nd sternite and the base of the tubercle is joined with the posterior margin of sternite 2 (Bright 1976, LaBonte et. al. 2003).

Taxonomic Hierarchy for University of Alberta E.H. Strickland Entomological Museum