Adjective
ectoparasitic (not comparable)
Of or pertaining to ectoparasites.
In Iceland most ectoparasitic insects live in sheltered conditions or actually on mammals; examples include lice, fleas and bedbugs, in whose living conditions freezing is no concern, and most of which were introduced inadvertently by humans. Source: Internet
Powell (2009), p. 199 Parasitism Over 1000 species of beetles are known to be either parasitic, predatory, or commensals in the nests of ants. citation A few species of beetles are actually ectoparasitic on mammals. Source: Internet