R. K. Selander, 1953 12 Tinajas Altas, 220 ft., 27 mi. S Wellton, Yuma Co., Arizona Feb. 17 Along the highway from Yuma to Wellton there is little vegetation such as would harbor coctus wrens. Most of the land around Wellton is farmed. The rest is barren except for some desert scrub. Apparently the wrens occur in this region in small numbers, however. I was very surprised to find the nest at the gas station near Wellton. It is back along the hills where there is sufficient development of coctus and other vegetation to support wrens in any numbers. Feb. 8. Up at 6:00. Drove south for a few miles into the hills on the Engineer's Road. Found some areas (canyons) showing a cover of a type of cholla which is short with short, fat branches. Cardons also present. No coctus wrens or their nests seen. A few coctus wrens may occur in this region, however. Collected a sage thrasher and a plain opechla. Returned to Wellton at noon. The coctus wren at the gas station was active, during the period since I had first visited the nest some fresh paper had been added to it. Only one bird was seen. This perched on the top of a small windmill and repeatedly gave a soft 'cha-wa (cha-wa-cha-wa), somewhat higher pitched than the notes of loryzili. The 'song' was very soft,