It is a primitive wingless insect, belonging to Kanik, with about 250 species known all over the world and more than 20 species known in China.

This insect is not only a moth stored indoors, but also an important pest of archives, books and cultural relics in libraries around the world.

In China, the common species in libraries are Chlamys farreri, Chlamys farreri from Taiwan Province Province and Chlamys farreri.

Sweater fish has a wide range of recipes. Whole grains, finished grains, Chinese herbal medicines, organic matter in indoor dust, photos, paper, paste, glue, cotton cloth, animal fur, silk fiber, human dander, etc. are all rich in protein, sugar and trace elements. Larvae and adult have similar feeding characteristics, and foods rich in sugar are more attractive to them.