Hairy spider beetle Ptinus villiger Adults are 2240 mm

long and reddish brown. Elytra have irregular white patches anteriorly and posteriorly. Full-grown larvae are about3.8 mm long, yellowish white and with a dark-brown head. They are most often found in grain warehouses. Eggs are laid on the outside of flour bags or through the mesh of cloth sacs, and in flour debris; fecundity is about 40 eggs. Larval development is about 90 days, and full-grown larvae usually move away from the food source to pupate. Full-grown larvae burrow into wood close to the food source. Larvae often overwinter as pupae and continue development in the spring. This species is distributed throughout Europe, Asia, and North America.

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