body lice
Lice that live in dirty unwashed longworn clothes or bedding. Often found on neglected homeless, derelicts, gutterpunks, crusties, homebums etc. they suck blood hanging of the cloth and are very itchy. They lay their eggs in the seams. They can spread tyfus. They die with high or low hot or cold temperatures, so can be rid of by hot washing or freezing of the clothes or bedding
Most of those filthy tramps are infested with body lice