J.R. Alcorn August 1939, Tadarida mexicana [4] Fallon, 4000 ft, Churchill Co, Nevada. It was the Sagebrush Cafet bar which is a two story structure. I watched the bats for 10 or 15 minutes and captured one with the aid of a stick. All the bats I looked at had their mouths open and were panting indicating the heat was warmer than to be comfortable for them. I observed these bats on several occasions in Aug. & on most all occasions they were panting with mouths open as though they were suffering from the heat yet they did not move to another location at least during my observation of them which lasted over a 27 day period.