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The stomachs of 3 Myotis keenii (Merriam), 16 M. lucifugus (Le Conte), 4 M. sodalis (Miller and Allen), 2 Lasionycteris noctivagans (Le Conte), 23 Pipistrellus subflavus (Cuvier), 184 Eptesicus fuscus (Beauvois), 128 Lasiurus borealis (Müller), 3 L. cinereus (Beauvois), and 2 Nycticeius humeralis Rafinesque were examined. The four most common bats of Indiana used as their most common foods, different major groups of insects, beetles in the case of Eptesicus, moths in Lasiurus borealis and Myotis lucifugus and leaf hoppers in Pipistrellus. Eptesicus fuscus did not appear to feed in winter. Weaning in that species appeared to occur about July 1.
John O. Whitaker (Thu,) studied this question.