K. Selander, 1952 6 Comphylorhynchus m. megalopterus August 13 15 mi. N Cuernavaca, 8900 ft., Morelos, Mexico.-long momentarily upside down beneath a branch. Move rapidly, hopping from branch to branch in the manner of jays. Not seen to frequent places below 10 feet in elevation, preferring the median and higher portions of the oak trees. Much more often seen in oak than in pine. I spent about 2 hours following a band of these wrens from tree to tree. They did not move very great distances-seemed to prefer certain location. May have been two separate groups. About 10 birds present. While feeding they occasionally give a soft, low "chup" much like the note of a robin. Generally the birds were silent during the time I had them under observation. Occasionally, they became excited at which times they all commenced a loud chatter, "che-cha-cha" being an often heard call. "Che-de-dit" given over and over very rapidly. The periods of excitement determine were very short. Could not source of stimulation for these periods, although my presence may have alarmed the birds. The band of wrens remained together well, with little tendency for the birds to become separated from one another. Usually several birds feeding in the same tree. My squeaking and imitation of their notes proved of little value in bringing them close or in exciting them to calling with the exception of my first