Species Details

Scolytus tsugae

University of Alberta E.H. Strickland Entomological Museum Read more about this collection »

Common NameHemlock engraver. SeasonalityAdult S. tsugae may usually present from May to early September, with peak activity late June and July (McMullen & Atkins 1959, Bright 1976). IdentificationThe adults of these beetles may be 2.8 to 3.5 m long, with a black body (Bright 1976). In males, the frons is generally flat or slightly convex with course articulation. Females, on the other hand, have frons that is convex with finer articulation (Bright 1976).

Scientific Name Scolytus tsugae Common Name Hemlock engraver. Habitat Adults may be found most commonly around and on host trees while larvae are always found in tree trunks in galleries (Bright 1976). Seasonality Adult S. tsugae may usually present from May to early September, with peak activity late June and July (McMullen & Atkins 1959, Bright 1976). Identification
The adults of these beetles may be 2.8 to 3.5 m long, with a black body (Bright 1976). In males, the frons is generally flat or slightly convex with course articulation. Females, on the other hand, have frons that is…
The adults of these beetles may be 2.8 to 3.5 m long, with a black body (Bright 1976). In males, the frons is generally flat or slightly convex with course articulation. Females, on the other hand, have frons that is convex with finer articulation (Bright 1976).
Life History
This species of bark beetles overwinter as larvae (specifically as forth instars) (Bright 1976, McMullen & Atkins 1959). Pupation occurs in the spring in the bark of host trees and adults usually emerge in June and…
This species of bark beetles overwinter as larvae (specifically as forth instars) (Bright 1976, McMullen & Atkins 1959). Pupation occurs in the spring in the bark of host trees and adults usually emerge in June and July (Bright 1976, McMullen & Atkins 1959). Egg galleries and oviposition occurs in June and eggs will hatch within 9 to 12 days (McMullen & Atkins 1959). There is only one generation per year (Bright 1976).
Conservation N. A. Diet Info
These beetles tend to infect mostly hemlocks (Tsuga spp.). They may also target firs (Abies spp.) and Douglas-fir (Pseudotsuga menziusii). They feed mostly on dying branches and twigs on the ground around host trees.…
These beetles tend to infect mostly hemlocks (Tsuga spp.). They may also target firs (Abies spp.) and Douglas-fir (Pseudotsuga menziusii). They feed mostly on dying branches and twigs on the ground around host trees. Larvae feed on the wood of trees (Bright 1976).
Range These beetles may be found along the western coast of Canada and Rocky Mountain region in Canada (McMullen & Atkins 1959). They may also be found in western U.S.A. (Bright 1976). Notes
Beetles of this taxon were originally described as two distinct species by Swaine (in 1917), as S. tsugae and S. monticolae. However, due to the presence of several intermediate morphological forms of these two…
Beetles of this taxon were originally described as two distinct species by Swaine (in 1917), as S. tsugae and S. monticolae. However, due to the presence of several intermediate morphological forms of these two species, both taxons were synonymized as S. tsugae (McMullen & Atkins 1959).
Scolytus tsugae
Scolytus tsugae

Citation

Page Citation for Scolytus tsugae

Page Citation

"Scolytus tsugae, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-33860. Accessed 20 Sep. 2021.

Taxonomic Hierarchy

Kingdom Animalia Phylum Arthropoda Class Hexapoda Subclass Insecta Order Coleoptera Suborder Polyphaga Family Scolytidae Genus Scolytus Species Scolytus tsugae
This hierarchy is created from our museum records, it may not always accurately reflect modern taxonomies.

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