Pine Sawyer Beetle (Trichocnemis speculates) — This week we received two reports of this large beetle — the largest beetle in Montana. They can be found in forested areas of Douglas Fir and Ponderosa Pine (their principle hosts) throughout the Rocky Mountain region. Females lay eggs in the cracks of suitable logs or stumps. The larvae develop in trees that have recently been felled or killed by fire. They do not attack live trees. The larval stage typically takes 3 to 5 years until pupation and the emergence of the adults that garner so much attention. And at a length of up to 3.5 inches, that attention is certainly well deserved. Interesting fact: The mature larvae of the Pine Sawyer have gnawing jaws that inspired the invention of the chain saw. Photo by Jennifer Boyer on July 8, 2017 in Missoula, MT.