I followed tunnels in various directions and found Mormoops to be abundant in most all parts. Sometimes I saw a Chilonycteris rubiginosa, Pteronotus, Natalus or a Glossophaga. Mormoops Nos. 12186 to 12191 inclusive and 12197 to 12200 inclusive were taken. Pteronotus Nos. 12192 and 12193 were picked from the sidewalls where I found them in association with Mormoops. Clear day. 7 A.M. 62°F, and 12 N. 85°F. December 19, 1926- During the afternoon we visited the No. 3 mine again. As before along the entrance tunnel where we had to wade in water we found Glossophaga and in some of the first lateral tunnels we I found them also I saw one Carollia. In the first cross tunnel or ore vein there were thousands of Mormoops. We spread our mosquito bed net across one side tunnel and caught 64 Mormoops and one Chilonycteris rubiginosa by making a drive with a light. From the first vein we followed another tunnel