C. Koford 1957 Saccopteryx bilineata 2 May 1957 Chilibrillo Caves, Panama I captured one in hand net several yards inside entrance to cave. 7 May 1957 Barro Colorado Is., C.Z. About 10 one site and 25 another between butresses of Big Tree near JVT 4. None landed & no pairs seen. One hanging behind old Zetah office recently. 11 June 1957 I saw 9 juveniles gliding, each clinging to an adult, on trunk of the Big Tree on Van Tyne Trail. Evidently restricted breeding season as have watched for young since last summer.