BIOLOGICAL STUDIES OF HEMICOELUS-GIBBICOLLIS (LECONTE) (COLEOPTERA, ANOBIIDAE), A SERIOUS STRUCTURAL PEST ALONG THE PACIFIC COAST - ADULT AND EGG STAGES

The anobiid beetle, Hemicoelus gibbicollis (LeConte), is among the mos t serious structure-infesting insect pests along coastal areas of west ern North America. Adult beetles are difficult to find due to their sm all size, cryptic coloration, and sedentary behavior. They readily ovi posit in crevices of building timbers that eventually may be damaged s ufficiently to require replacement. Females can lay in excess of 100 e ggs and egg hatch ranges between 85 and 89%. Pheromones play a key rol e in mate location. These beetles are primarily found in damp crawl sp aces and unheated outbuildings.