K. Selander, 1954 C. chiapensis 3 March 20 (=NW) 2.8 mi. along road to Arriaga - Stopped in a dry spot and hunted along a dry ditch. Took a Thryothorus pleurostictus but heard no other wrens. Saw no nests although there was ample acacia near the ditch. Rio Telchapa 4.7 = 4.8 mi. along road to Arriaga, - Hunted about 45 minutes along a river at a spot where a new bridge is in construction. Many birds in the trees and brush along the river but no wrens or nest noted. There is a small amount of water here in the stream so apparently it is never dry. Noted laughing falcon, becard, spotted sandpiper, Caloitta formosa, large kingfisher, yellow-bellied trogon, grackles. Expected to find chiapensis here, a bit drier here than at our camp in Tonala', 5.4 mi. along road to Arriaga - walked about 200 yards west from the road. In low bushes along road I noted one Thryothorus pleurostictus singing from a low branch. Song consists of several sharp notes and a trill. On a small tree just across the dirt road I saw a C. humilis foraging about 10 feet above the ground. Later we collected 4 C. humilis in a dense stand of acacia and vines a short distance from the road. We watched wrens foraging in the yard of a Mexican farm. Three C. chiapensis were working over the roots of upturned trees and on the trunk bases of several