R.K.Selander, 1952 Rio Metzitlan, 4000 ft., 20 mi. N Atotonilco, Hidalgo, Mexico. July 25 in this region. On approaching the arroyo in which we are camped, you drive through several miles of this vegetation. The arroyo is the same one in which the town of Metzitlan is located. At about 7:00 I drove up from the river bed to the cordón forest and hunted for almost an hour. Took 1 Benick Wren. No cactus wrens observed. Want to bed at 9:30. July 26 - Up at 6:30 - hunted along the river until 1:30; Collected 7 Campylorhynchus [illegible]xgularis (OK.) along the river in willows and black walnut. Birds abundant along the river. The following species were also noted; turkey vulture (flying over cactus slopes); blue mockingbird (common in dense willows); Basileuterus rufifrons (1 collected by Lamb); Inca dove (common around farms); chat (1 collected in dense riparian bushes); Catharus (about 6 seen, 1 collected); Vermillion flycatcher (several seen in black walnut trees around willows, 1 or collected); Centurus aurifrons (1 collected; 1 collected by Lamb); Gray thrush (several seen - seemed very disturbed by my presence - apparently nesting); Brown towhee (1 juvenile taken in willows); blue grosbeak (black walnut: 1 collected and given to Lamb); hooded oriole (apparently rather numerous in walnut trees); house finch (flocks in black walnut). Began skinnig at 2:00; skinned 13 birds.