Family UROPODIDAE
Uropoda sp.
Natural host.—Blattella humbertiana, Formosa (Takahashi, 1940). Nymphs of the cockroach may be destroyed (Takahashi, 1940). Uropodids frequently attach themselves to insects, especially in nymphal stages but probably are harmless (Baker and Wharton, 1952).
Family DIPLOGYNIIDAE
Undetermined diplogyniid
Natural host.—Panesthia australis, imported into U.S.A. from Australia (Roth and Willis, unpublished data, 1955): Cockroach determined by J. A. G. Rehn. According to Dr. J. H. Camin (personal communication, 1955) this is a new genus and new species in the subfamily Diplogyniinae, and is most closely related to the genus Lobogynioides. Mites of this family live as ectoparasites and commensals on beetles and possibly other insects (Baker and Wharton, 1952).
Family ANOETIDAE
Histiostoma feroniarum (Dufour)
Natural host.—Pycnoscelus surinamensis, Germany (Roeser, 1940): Though not parasitic, the mites at times became so numerous that the insects were hindered in their movement, were unable to feed, and died. The mites were introduced with soil and leaves and had originally been attached to millipedes, waterfleas, and sowbugs.
The deutonymphs, hypopial forms, or travelers are found on insects; the other stages are found in decaying organic matter (Baker and Wharton, 1952).