m. Koford 1951 Saccopteryx bilineata Feb. 23 Laboratory Buildings, Barro Colorado Island. When we arrived at about 9:00 a.m. at the cabins just below the lab. there were 6 or 8 of these bats hanging on the outside (going up) of the cabin to the left of the trail. They were mostly on the window screens and were very alert, flying when approached from either the outside or inside. They were too far from the ground to reach with a net. When I tried to hit them with rocks they moved to other screens on the same house. Finally some flew to the outside of the other (our cabin) house across the trail and when pursued here they disappeared among the trees. Eventually I chased them all away without catching one. Feb. 24 Carl saw one today on the outside of our cabin. None on the other house. Feb. 25 Carl located one in the afternoon on the outside of the house where we found them the first day. We chased it from one window screen to another until finally he got close enough to hit the screen from the inside and knocked the bat to the ground, stunned momentarily, where we caught it. It was still alive and very active the next morning when I killed it. Dead by night (kept in sack) a ? with tattered abdomen?