This fellow is the Pediculus Corporis!
"Si Klegg, Book 1 (of 6) His Transformation From A Raw Recruit To A Veteran" by John McElroy
The pediculus and culex marinus the sea lowse and flie are also no strangeres.
"The Works of Sir Thomas Browne" by Thomas Browne
And now, bidding the "pediculus corporis" adieu with a great deal of pleasure, I ask the reader's attention to another theme.
"Under the Stars and Bars" by Walter A. Clark