ISSN 1911-2173

Canadian Journal of Arthropod Identification

Dichotomous and matrix-based keys to the Ips bark beetles of the World (Coleoptera: Curculionidae: Scolytinae)

CJAI 38 — June 27, 2019


Hume B. Douglas1, Anthony I. Cognato2, Vasily Grebennikov3, and Karine Savard1

1Agriculture and Agri-Food Canada, Canadian National Collection of Insects, Arachnids and Nematodes, 960 Carling Avenue, Ottawa, Ontario, K1A 0C6, Canada. Email:

2Michigan State University, Department of Entomology, 288 Farm Lane, room 243, East Lansing, MI 48824, USA.

3Canadian Food Inspection Agency, K.W. Neatby Building, 960 Carling Ave., Ottawa, ON, K1A 0C6, Canada.




The 37 species and 8 non-nominotypical subspecies of Ips DeGeer, 1775 bark beetles of the World are included in a first comprehensive key to adults. Males and females of species with diagnostically important dimorphism are treated separately. Diagnostic morphological summaries are presented for all species and subspecies in fact sheets. Fact sheets include over 200 illustrations, with rotatable images of species that are little known or economically significant pests (I. amitinus (Eichhoff, 1872), I. calligraphus (Germar, 1824), I. cembrae (Heer, 1836), I. confusus (LeConte, 1876), I. duplicatus (Sahlberg, 1836), I. grandicollis (Eichhoff, 1868), I. hauseri Reitter, 1894, I. lecontei Swaine, 1924, I. perturbatus (Eichhoff, 1869), I. pini (Say, 1826), I. sexdentatus (Boerner, 1767), I. shangrila Cognato and Sun, 2007, I. stebbingi Strohmeyer, 1908, I. subelongatus (Motschulsky, 1860), I. typographus (Linnaeus, 1758), I. woodi Thatcher, 1965). Links to an online peer-reviewed LUCID key to world Ips species and downloadable LUCID files are provided.

Ips pini (Photo by K. Bolte)