Abstract
Mites, ticks, lice, fleas and cutaneous maggots were encountered. Cotton rats were generally more heavily infested than rice rats. Mites occurred with greater frequency in moist habitats, while ticks and fleas abounded in drier situations. Annual cycles of abundance are reported for the mite, Liponyssus bacoti, and the flea, Polygenis gwyni. There appeared to be no ecologic associations among ectoparasites as indicated by records of host-infestation. Host reactions to parasitization were negligible in most instances.
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