The Biotic Associations of Cockroaches

by Louis M. Roth; Edwin R. Willis

Blattisocius tineivorus (Oudemans)

Synonymy.—Blattisocius triodons Keegan [Baker and Wharton, 1952].

Natural host.—Blattella germanica, U.S.A. (Keegan, 1944): Three mites found on 238 cockroaches examined; others taken in debris from floor of cockroach cage (Keegan, 1944). Members of this family are predaceous (Baker and Wharton, 1952).

Family LAELAPTIDAE

Blattilaelaps nauphoetae Womersley

Natural host.—Nauphoeta cinerea, Australia, Brisbane (Womersley, 1956).

Coleolaelaps (?) sp.

Natural host.—Gromphadorhina portentosa, the hosts were imported into U.S.A. from Madagascar via Europe (Roth and Willis, unpublished data, 1958): The mites (pl. [12], C) were tentatively determined by Dr. E. W. Baker.

Hypoaspis sp.

Natural host.—Panesthia australis, imported into U.S.A. from Australia (Roth and Willis, unpublished data, 1955): Cockroach determined by J. A. G. Rehn. Generic determination of mite made by Dr. R. W. Strandtmann (Camin, personal communication, 1955).