Niger PluB 1972 Journal 63 23Oct NW Villa Hayes Rd, Dept Pte Hayes, Paraguay 23Oct released. 7:45 angle first bat from roof & from then until 8:30 I was busy. Caught 36, including 2 small molossid which I released unmarked & 1 which I kept. I kept 10 Nyctis & Molossus tattooed 23. Unfortunately those that I kept turned out to be not so distinct sp. So I can't be certain that all the banded individuals are the same. The two sp. of Nyctis & the large molossid apparently use the same roost, or at least adjacent part of the roof. Must get incredibly hot! That one of the released molossid was a preg. ♀, the other a scrotal ♂. Quit at 10 after not catching anything for ½ hour, & not wanting to recapture the marked bats as they returned. 10PM temp 88°F. Night clear windy. Lots w. little or no fat. after skinning the bats, I found most of them the ♀'s to be lactating. I suspect that had I handled the tattooed ones roughly (i.e., squeezed the nipples w. forceps) more would have yielded milk. Most had enlarged nipples but (still?) largely covered with hair. Just starting to lactate? Verruinary tissue quite swollen. 24Oct hot, clear, strong wind from N. walked to Guireba cas wich Nortilis roost. Thermometer, 6" up hole in tree registered 31°C, which