Natural hosts.—Diploptera punctata and Nauphoeta cinerea, U.S.A. (Roth and Willis, unpublished data, 1954): Mite genus determined by Dr. E. W. Baker (personal communication, 1954). The mites cluster thickly on intersegmental membranes, particularly around the coxae and neck. Despite a heavy infestation, the colony of Nauphoeta thrived for several years. This mite was found first on N. cinerea and possibly transferred to D. punctata when the latter was brought into the laboratory from Hawaii.
Family IOLINIDAE
Iolina nana Pritchard
Natural hosts.—Blaberus craniifer (originally from a culture at Harvard University) and Diploptera punctata (originally from Hawaii), U.S.A., Pennsylvania (Roth and Willis, unpublished data, 1953; Pritchard, 1956): The mites usually attached near the wing bases of the insects. Morphologically, the species is intermediate between certain predaceous and phytophagous mites (Pritchard, 1956).
Family PTERYGOSOMIDAE
Pimeliaphilus podapolipophagus Trägårdh
Common name.—Cockroach mite.
Natural hosts.—Parcoblatta sp., U.S.A. (Edmunds, 1953a).
Periplaneta americana, U.S.A. (Piquett and Fales, 1952).
Cockroaches. U.S.A. (Baker and Wharton, 1952).