JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. American Society of Mammalogists is collaborating with JSTOR to digitize, preserve and extend access to Journal of Mammalogy.ABSTRACT: Observations were made on the diet of five insectivorous bats (Lasiurus borealis, Euderma maculata, Eumops perotis, Tadarida brasiliensis and Antrozous pallidus). Reported are percentages of insect remains for each species, obtained from guano, stomach contents or fragments found under the night roost. Discussed are methods used in obtaining insect samples and limits on the level of taxonomic determinations, caused primarily by thorough chewing by the bats. Foods of A. pallidus from four localities in southern Arizona included representatives of 6 orders, 43 genera and 22 identifiable species of insects, several of them flightless forms. 70Vol. 42, No.

Due to the increasing number of studies of bats in the southwestern United States and the public health problems which these animals present, a compilation of the ectoparasites of the bats that occur in Arizona is deemed appropriate at this time. Bats in their seasonal activities cover large areas, even migrating between the United States, Canada, and Mexico, and there is a considerable opportunity for dissemination of their ectoparasites. Notable among these parasites is the tick, Dermacentor andersoni, a known vector of Rocky Mountain Spotted Fever. We have undertaken a survey of the literature and the collecting of bats in Arizona. In the course of this work over 20,000 bats of various species were checked for parasites by the authors. The bats inspected in this survey were obtained in various ways: by visual inspection of caves, mines and houses for bats; by mist-netting over waterholes and streams, and caves and mines, by shooting isolated bats over waterholes and in caves and mines. The ectoparasites were otbained by the use of K. A. A .D. which was dropped over the more active ectoparasites. This caused their immediate death and greatly facilitated the collecting. All of the specimens were preserved in K. A. A. D. which is a mixture of one part kerosene, two parts glacial acetic acid, ten parts 95% ethyl alcohol and one part dioxane. New state records, host records and several new species were obtained, but no special attempt is made to refer to them in this paper. First reports for the United States are noted for Paratrichobius longkrus, Trichobius mixtus and T ecomatlana sandovali. All of these ectoparasites were taken from bats collected in Arizona.

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