caught in the same cornfield. It was nearly destroyed by ants. Records taken in the house today 7:22 AM - - - - 66°F. 1:30 P.M. - - - - 80°F, 7:45 - - - - 70°F. January 7, 1927 - a mouse which I assume to be Oryzomys was caught in a small snap trap and which was baited with oatmeal. The trap was set under the edge of a loose bundle of caffecorn fodder which I found in a small corn patch or corn field at an altitude of 1700 feet on the Volcano of San Miguel. The number of the specimen is 12270. There were other small corn patches near and some one hundred feet higher as recorded by my barometer. The corn patches were gassy and weedy, the corn having been picked some time ago. I The custom is to plant caffecorn after the or before the corn is picked. In these fields most of the coffin corn had been cut. There were many seeds on the ground under the dead weeds, some of which I found in the buccal pouches of Oionys which were taken in the same field. Some places I found where corn bushes had been torn into fine pieces and were lying about in bunches near a corn do. Traps set in such places were usually