Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
The Bark and Ambrosia Beetles of North and Central America (Coleoptera: Scolytidae), a Taxonomic Monograph
By Stephen Wood
Great Basin Naturalist Memoirs, Number 6, Brigham Young University, 1982
Cite: 177684 with citation markup [cite:177684]
Most comprehensive work on bark beetles for North America.

Alternatively, from Biodivers
Alternatively, from Biodiversity Heritage library:

Wood 1982 available in digital form
Can be downloaded in its entirety or viewed online at:

I recommend downloading the dejavu version and free reader. Much smaller file size than the PDF version.