Fur mites of the genus Schizocarpus Trouessart, 1896 (Acari, Chirodiscidae) parasitic on the American beaver Castor canadensis in Indiana, U.S.A. Bulletin & Annales de la Societe Royale Belge d'Entomologie, 120(7-8) 1984: 211-239. 235 [Zoological Record Volume 121]