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).
Citation
Page Citation for Scolytus tsugae
Page Citation
"Species Details - 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 16 Apr. 2024.
References
Author
McMullen, L. H. and Atkins, M. D.
Title
Life-history and habits of Scolytus tsugae (Swaine) (Coleoptera: Scolytidae) in the Interior of British Columbia.
Publication Date
1959
Series Title
The Canadian Entomologist
Volume
91
Pages
416-426
Author
Bright, D. E.
Title
The bark beetles of Canada and Alaska. Coleoptera: Scolytidae.
Publication Date
1976
Specimen Information
There is 1 specimen of this Species.
UASM202027 - Scolytus tsugae
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Waterton Lakes National Park, Waterton
Collected ByCarr, F. S.
Date Collected1931-07-20