Origin:
Possibly European in origin but found throughout the world.
Biology:
Spider beetles in general are omnivores, and this species is known to feed as a scavenger on many foods such as dried mushrooms, animal feces, feathers, dead insects, dried fruit, grains, etc. It is partial to materials that may be in poor condition, somewhat damp, and moldy, and its presence may indicate an unsanitary condition that should be discovered and removed or cleaned. Damage to books or other non-food items occurs as the larvae bore into them to construct a chamber or cell in which to pupate. They are resistant to cold temperatures, making them more difficult to control by this method.
Identification:
Spider beetles derive this name due to their appearance. They have very round elytra, a round thorax, and long, thin antennae and legs, and in general present the appearance of a small, hump-backed spider. This species is more elongate than some other kinds, with the sides of the abdomen somewhat parallel. It is dark gray in color and has 2 light patches on the anterior wing covers, along with rows of pits on the elytra and a sparse covering of long hairs over the wings and thorax. The adult beetle is very small, only 3-4 mm long.
Characteristicts Important to Control:
Control of dampness and spoilage of food materials is important, as these beetles are drawn to foods in poor condition. Sanitation to eliminate the accumulation of dead insects or animal carcasses, or the feces of birds or rodents, will decrease the occurrence of the beetles in a structure. If found indoors an inspection must be made to locate the source of the infestation, the source disposed of, and vacuuming and use of contact insecticides in that area done to eliminate wandering adult beetles.
