13 mi. N.of El Mayor, Lower Calif. Mexico. April 29. in the more open part of the Jan. Phamogepla niths, A. flaviceps, Seterus bullocki, C. a. septentrionalis, P. plumbea and M. c. emerascens were the commonest birds. Saw a few Calypte costae, Vermi- vora celata lutescens and one flock of Fengella passerma arizonae. In the afternoon worked the country from the camp down towards the river. Saw a Dendroica auduboni a. several Znaidura macrorham; three Melmorpes uropygiales, three Dryobates muttallii 30-40 A. p. sonomensis, 3-4 Blue Grosbeaks, several J. verticalis, one V. c. lutescens and once A. flaviceps. The D. muttallii and M. uropygiales were very shy and it was only by a piece of luck that I got one. In the evening while we were out on the trap line where we had a regular bat shoot. The bats were flying straight from the hills to the river and we took eight before the scanty supply of ammunition ran out. The open country is full of flies and mosquitoes, making a camp here very uncomfortable.