body louse

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A parasitic louse (Pediculus humanus subsp. humanus) that infests the clothes and body of humans and can transmit diseases such as typhus.

from The Century Dictionary.

• noun A kind of louse, the Pediculus corporis or P. vestimenti, which is parasitic on man.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A parasitic insect, Pediculus humanus corporis, that infests the body and clothes of humans and feeds on blood.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a parasitic louse that infests the body of human beings