R.K.Selander, 1952 Comphya hynechus jocosus gularis Rio Mitzitlan, 4000 ft., 20 mi. N Atotonilco, Hidalgo, Mexico. July 27 - Similar experience with these wrens as yesterday. Like C. brunneaepollens, they do not flip the tail up over the back. Sit rather erect. Observed a number of small groups in small walnut trees (about 20 feet in height) planted in corn fields: Wrens may have been feeding about the corn stalks. The blue mockingbird is common in this region and I often quite closely associated with wrens; often give a call which sounds very much like that of the wren and may be an imitation of it. July 28 Brood patches present on adult females examined but somewhat less rusty than those of incubating passerines which I have examined. Signs of molt in some birds. Some juveniles bore tail feathers emshethed at the base. Gonads of adult males as large as 4-5 mm.; this indicates that the nuptial season has been only recently completed.