From place for, basically happen in the side outside big labium, nympha of Yi Ke drag in, monsveneris, diffuse anus also is common.

从部位来说，主要大阴唇外侧，亦可累及小阴唇、阴阜等，扩散到门也是常见的。

Its chest is wider than the abdomen, and the abdomen gradually narrows from the base to the end.Its nymphae is identical to adult in shape, but smaller in size, and infant nymphae has no scales.

主要出现有淀粉的场所，除种粮食、食物外，常啮食图书、期刊、纸张、档案等。