Douglas-fir tussock moth

Douglas-fir tussock moth, Orgyia pseudotsugata Order: LepidopteraFamily: Erebidae Description Young larvae of the Douglas-fir tussock moth are black with long body hairs. Mature larvae are around 3.5 cm (1.4 inch) in length and develop brightly colored tufts of hair....

Ips beetles

Ips beetles, Ips spp. Order: ColeopteraFamily: Curculionidae Description There are 11 species of Ips spp. inhabiting Colorado: Ips hunter, Ips pilifrons, Ips pini, Ips knausi, Ips calligraphus, Ips confusus, Ips latidens, Ips borealis, Ips integer, Ips woodi, and Ips...

Elm leaf beetle

Elm leaf beetle, Xanthogaleruca luteola Order: ColeopteraFamily: Chrysomelidae Description Elm leaf beetle is a pest of elm trees and a household nuisance when adults seek shelter during winter months. Larvae feed on the underside of leaves and are historically common...

Brownheaded ash sawfly

Brownheaded ash sawfly, Tomostethus multicinctus Order: HymenopteraFamily: Tenthredinidae Description Adults of the brownheaded ash sawfly resemble small dark black wasps that do not sting. They have a saw-like ovipositor used to lay eggs in the edge of developing ash...

Spider mites in shade trees

Spider mites in shade trees Order: AcariFamily: Tetranychidae Description Spruce spider mite, Oligonychus ununguis  The spruce spider mite is a native pest of spruce and juniper. Adults are dark green or black and are extremely small at around 0.6 mm in length. When...