E.U. Miller 1940 General Account. flat with medium-thick growth of high mesquite and smaller prickly pear cactus. The soil is light grayish brown and of fine texture. After putting up the speci- mens we drove on to Matamoros. This town is fairly large but possesses exceedingly poor roads and two we saw stores or buildings of any consequence, most of the houses, etc., being of the dilapidated Mexican type. From Matamoros we drove 5 for 5.7 mi. and turned off into the brush, which here was mostly large mesquite and other brush, with a small amount of cactus. It was open enough to get through to set traps in most places. A little grass was growing on the gray- brown, fine textured soil. At sundown I set 50 M specials to the N of our camp. After dinner I set 50 live traps for mice, baited with birdseed. During this I shot a Silviloquo and Benson a Parrague. April 7 In traps set last night got nothing in live ones. In others: 1 Perognathus merriami σⁱ; 2 Onychomys leucogaster 1σ, 1φ; 7 Peromyscus leucopus, 4σ, 3φ. During the day Benson shot 2 Green Jays and I a White-eyed Vireo. After lunch we traveled 3 toward San Fernando, turning off the highway to go over to the Laguna Madre. Tonight we camped near an arm of it, by a small pond. I set 50 M. specials on flat ground covered with a loose large growth of tussocks of coarse grass and small weeds. On the pond I shot a φ Shoveller and an 14