Quest 1948 Journal 22 April 17 Cerro Prieto 30 ft, 20 mi SSE Mexicali Baja Cal/ and mesquite, and 50 Museum Specials in a similar association; and 10 Schuyler traps higher in rocks. The mosquitoes are very bad at night. April 18 4:00 P.M. Have moved back to the irrigation slutch for the night in order to be cooler under the mesquite and take baths and wash our clothes. We moved from the base of Cerro Prieto about 3:00 P.M. 100 mouse traps (50 live and 50 Museum Specials) set in rocks near sand and mud flat last night caught 1 Perognathus baileyi, 5 Perognathus spinatus, ~~two Peromyscus eremicus, and 5 Perognathus penicillatus. 10 Schuyler traps set higher in rocks caught nothing. Minimum temperature last night was 67°F; Maximum (about 1:00 PM) was 96°F. The day has been sunny and clear, a nice breeze blowing from the north. We are breaking camp and heading back to Mexicali tomorrow morning. April 19 (Written in Mexicali). It was cool last night; minimum temperature being 62°F. Dr. Benson shot a Batocerus last evening, and I shot one female Pipistrellus hesperus and one female Tadarida mexicana. Dr. Benson found