R.K. Selander, 1954 Comylorhynchus jocosus Km. 335, 9 mi. WNW Huajicopan de Leon?, Oaxaca, Mex. 5500ft; May 6 About 5:30 P.M. we found a group in a stand of low fan palms & a thorny tree. When I first saw the birds three or 4 were associated in a loose flock - we may have disturbed them. There were numerous nests in the area - we pulled down at least 12 looking for eggs after we found one of the # buds I collected back a cleared patch. Apparently presence of trees of more than 10 feet or so is necessary for the wrens as we did not find them in a stand of similar vegetation where the trees were only a few feet high. After pulling down a nest we noticed one bird return to the tree & perch near spot nest had been. On another occasion a lone bird flew from a nest we pulled down - no eggs. The wrens entered the nest about 1/2 hour before dark but it was cloudy and rained just after the sun went down.