C. Koford 8 Journal February 26, 1951 Barro Colorado I/sland, C.Z. north of lake. Hiked up Dorset trail looking for bats. Flushed 2 or 3 from tree - these flew rapidly away. Walked along Thomas Barbour trail and shot a pewee (?). Then along Van Tyne trail and took detour to Big Tree. The tree was biggest I have seen on Barro Colorado. A peccary grunted and ran from base of tree as I approached. Found about 40 Sarcopteryx lilivata on trunk of the big tree from 5 to 20 feet above ground and between the high buttresses in a light area. Shot about 6 of these (107, 59 g). Shot an ant worn near this tree. Returned to laboratory area. Made a box for shipping specimens. Put up 3 birds. Prepared to depart. about 4:15 p.m. we left in launch for Pigalle and took the 5 p.m. train for Panama City from there. Returned to the Tivoli Hotel. Completed putting up the Sarcopteryx. February 27, 1951 To Chilibrillo Caves, Canal Zone Visited Vargas Memorial Lab and talked with Drs. Clark, Fairchild, & Hertig. Clark planning trip to Mexico soon in order to study yellow (?) fever in monkeys there. Fairchild interested in horse flies. Hertig in Phlebotomus (250 ?), the sand fly which is vector of "veruga" in Peru. Hertig gave me some information on Peru. Trajesdo took me back to Hotel after visit to Ancón Commissary. About 1:30 p.m. Trajesdo picked up the entire family for a trip to Chilibrillo Cave. These are limestone caves about 100 yds. from the Trans-Isthmian highway. A hole has been made in the top of one chamber and an elevator carries out the mired bat guano. A house near covers advertising "Abono de