The Collaborative International Dictionary of English v.0.48:
Sarcoptid \Sar*cop"tid\, n. (Zool.) Any species of the genus Sarcoptes and related genera of mites, comprising the itch mites and mange mites. -- a. Of or pertaining to the itch mites. [1913 Webster]WordNet (r) 3.0 (2006):
sarcoptid n 1: whitish mites that attack the skin of humans and other animals; "itch mites cause scabies" [syn: itch mite, sarcoptid]