R. K. Selander, 1953 Baja California, Mexico Feb. 2 Crossed the Colorado by ferry just west of San Luis. No cactus to speak of. Land almost entirely in farms. Cactus wrens must be sparingly distributed in this area if they occur at all now. Apparently the cactus wrens do not require cactus. Pairs may be distributed here and there in canyons in the mountains or in patches of the original vegetation. In any event it is difficult to account for all the records of these birds in this northwestern part of Baja California in view of the vegetational picture today. It would seem to me that the Sierra Juarez would act as a near-perfect barrier separating luryanti and covesi. I suspect that the record 20 miles east of Tijuana represents a northern intrusion of covesi rather than indicating an westward extension of the range to that point. Continued on to Yuma, Arizona, passing through the border at San Luis without any trouble. Custom officer on American side merely looked in back of truck. At Yuma I was directed to a Mr. George Robinson who lives on third street at the T-O Garage. He is an old time desert rat who told me about large forests of cholla cactus in the hills south of Wellton.