C Koford 2 Artibeus lituratus palmarum jamaicensis & A. jamaicensis November 10-11, 1956. Barro Colorado Is., Canal Zone Taken 8 p.m., 11 p.m., 2 a.m., & day 6 a.m. They climb low to repeatedly when held by mesh for extraction. Probably smaller bats usually escape net. Kept these until afternoon of Nov. 11, then measured forearm, marked, released. Marks as follows: A.I.P. LR 11+11 //1// forearm 7 3/4 or testes protruding ///+1 6 8 1/2 ♀ nip. 1/2 mm. long. Lmm. ////+ 6 4 ♀ Lmm. LR-top 1+1// ///+1 6 9 ♀ Lmm. all flew to woods, among trees, & apparently landed in trees among branches. About 4 parasites found on wing membranes each (scand). Last eve November 12, 1956. Took two in nets near Chapman House; marked, & released. dorsal-ant. LR4 RR5 ♀ forearm 68. /XIII/ //X/ ♂♀ " 74 LR4 RR3 /XIII/ ///// Wing open. Nyctali, block typed, 4 wide x 3 1/2 long. A costi balled & ate at least one in mist net. November 22, 1956 Took one in mist net nr. New Lab LR4 RR2 about 10 p.m. Marked /XIII/ /XII/. Forearm 62. Prob. min. Released. November 28, 1956. Took ♀ ad., forearm 72, in mist net nr. Chapman House 7p.m. Tooz clipped ///+/// About 8 p.m., ♀, 71mm. forearm, toe mark ///x////. Perhaps killed before hung near net. Also in net a Chiroderma (57.863). November 29, 1956. One in net nr. Chapman House in a.m. ♀, forearm 73, many small spots. clinging to wing membranes; wt. 62 . Marked /XIII/ /// December 5, 1956. Setled one of ad. nr. Chapman House 7:50 p.m. Clip- ped toes ///// ///". Test about 5 mmms. Forearm 72. Between 9& 10 p.m.