August 1948 Journal April 13 El Mayor, 30 ft, Rio Hardy, Baja California It is now 9:25 P.M. and the mosquitoes and grats have disappeared. Arising from the river bottom are all kinds of noises; one, a loud brggyyy of about 2½ seconds given at one second intervals, and many others. We are leaving for Mexicali tomorrow. Seen on the trip today were several Round-tailed ground squirrels, an Antelope Ground Squirrel, and a White [illegible] Egret. April 15 Cerro De Centinela 300 ft 13 m WSW Mexicali, Baja California 7:30 A.M. Camped in an open wash near an acacia tree 200 yds from the mountains on the north side of the road. The mountains are bare and rocky except for a few small bushes growing on its sides in the water- courses. Minimum temp last night was 78° F. 9:00 P.M. Maximum temperature during the day was 100° F - taken by Maximus- Minimum thermometer in shade under one of the trucks. yesterday evening 50 live traps set in small meandering wash on alluvial slope 300-100 approx. yards from bare mountain slope caught: 4 Perognathus spinatus, 2 Perognathus formosus and 2 Peromyscus crinitus. The specimens