USDA Forest Service:
1912. Cones infested by cone moth (Laspeyresia torteuta). Bray, California.
USDA Forest Service:
1913. Insects and forest fires. A breeding place for various forest insects. Near Ashland, Oregon.
USDA Forest Service:
1914. Fire-scorched pines infested with Dendroctonus sp. Colestin, Oregon.
USDA Forest Service:
1914. Work of pitch moth larvae in twig of Pinus attenuata. Ashland, Oregon.
USDA Forest Service:
1916. "Ghost Forest" - lodgepole pine killed by mountain pine beetle following the 1890s lodgepole needleminer outbreak near Tenaya Lake, Yosemite National Park, California.
USDA Forest Service:
c.1916. Large sugar pine tree (Pinus lambertiana) attacked and killed by mountain pine beetle (Dendroctonus monticolae). "370 years old. Killed by Beetles in one year." Treated by Park Ranger Adair. Yosemite National Park, California.
USDA Forest Service:
1916. Hymenopterous gall maker in twig of black oak. Ashland, Oregon.
USDA Forest Service:
1916. Ptinidae larvae. Pinus jeffreyi cone.
USDA Forest Service:
1916. Larvae in galls formed on foliage of Libocedrus. Ashland, Oregon.
USDA Forest Service:
1916. Curculionidae. Balaninus sp. Larvae in Quercus californica acorns.
USDA Forest Service:
1916. Thysanocnemis larva in Fraxinus sp. seed pods.
USDA Forest Service:
1916. Lepidoptera. Tischeriidae. Arbutus madrona leaf miner.
USDA Forest Service:
1916. Monochamus maculosus wood borer larvae in galleries in pine wood.
USDA Forest Service:
1916. Larval work of small Tineid moth in pollen bodies of ponderosa pine. Ashland, Oregon.
USDA Forest Service:
1920. Scouting and mapping areas of beetle kill from a high point. Jenny Creek, Oregon.
USDA Forest Service:
1920. Western pine beetle (Dendroctonus brevicomis) galleries in Pinus ponderosa. Sierra National Forest, California.
USDA Forest Service:
1921. Investigating pandora moth (Coloradia pandora) defoliation of a yellow pine stand north of Kirk, Oregon. Klamath Indian Reservation.
USDA Forest Service:
1921. Entomologists looking for pandora moth (Coloradia pandora) pupae in the soil. Wocus Bay. Klamath Indian Reservation. Oregon.
USDA Forest Service:
1923. Tree peeled to show galleries of western pine beetle. Photo also shows the method of tagging and numbering trees for control work. Southern Oregon Northern California (SONC) beetle control project.
USDA Forest Service:
1923. Tree infested with Dendroctonus brevicomis almost stripped of bark by woodpeckers in their hunt for larvae. Southern Oregon Northern California (SONC) western pine beetle control project.
USDA Forest Service:
1923. Group of yellow pine killed by western pine beetle. Southern Oregon Northern California cooperative western pine beetle control project. Klamath Indian Reservation.
USDA Forest Service:
1923. Group of beetle-killed trees waiting for treating crew. Note cards in envelopes tacked to trees by spotters; these are brought in by the spotters as a record of their work. SONC western pine beetle control project.
USDA Forest Service:
1924. Dead forest above Tenaya Lake; trees killed by Dendroctonus monticolae. Yosemite National Park, California.
USDA Forest Service:
1924. These lodgepole pine trees, first weakened by a needle miner, were later killed by mountain pine beetle. Tenaya Basin, Yosemite National Park.
USDA Forest Service:
1924. Lodgepole pine killed by mountain pine beetle in Tenaya Basin, Yosemite National Park, California.
USDA Forest Service:
1924. Lodgepole pine killed by mountain pine beetle in Tenaya Basin, Yosemite National Park, California.
USDA Forest Service:
1924. Ponderosa pine defoliated by pandora moth. Calimus Butte area, Oregon.
USDA Forest Service:
1924. Ponderosa pine defoliated by pandora moth. Klamath Indian Reservation. Oregon.
USDA Forest Service:
1924. Ponderosa pine defoliated by pandora moth. Klamath Indian Reservation. Oregon.
USDA Forest Service:
c.1924. Ponderosa pine timber killed by old epidemic of mountain pine beetle (Dendroctonus ponderosae). Kaibab National Forest, Arizona.
