K. Selander, 1952 Camphylorhynchus humilis August 24 Pie de la Cuesta, 20ft., Guerrero, Mexico. - Both nest looked old. Constructed of coarse grass and small twigs. Not occupied at present (i.e. no eggs, no young). Wrens very common about the place where I found the nests. Nests located between two dense stands of mangroves. Trees in which nests were placed had short, numerous spines. Wrens are particularly common along fences where there is usually a stand of trees and thorny undergrowth of scrub. Hill rises rather sharply just north of the laguna - foothills covered with a very heavy scrub-thorny. Will have to investigate this upland vegetation to determine whether wrens occur there also. No definite signs of molt in adult specimens which I examined today. One adult had a decidedly light brownish eye - no indication of red. C. humilis certainly like C. rufinucha in behavior - calls perhaps louder. Have same foraging habits - not very gild - rather delicate. Skin is loose like rufinucha. Aug. 25 "Montosa" Island, 20ft., Laguna Coyuca, Guerrero, Mex. As common on island as on mainland. Singing. Aug. 26 Pie de la Cuesta, 20ft., Guerrero, Mexico. - These birds often fly into tops of palms, especially when frightened. They also occur in areas without palms, so they apparently are not a essential