K. Selander, 1952 July 26 Rio Nixtlalan, 4000 ft., 20 mi. N Atotonilco, Hidalgo, Mexico. His of juveniles were in pale blue or gray-blue; that of adults is a red-brown. These worms are apparently intermediate between guloris and joricos; several of the juveniles having slight spotting on the breast. The adults are rather extensively spotted below, perhaps more than in typical guloris. These worms are fairly common in this area; they are encountered in willows near the stream; in black locust trees 50-100 yds. back from the river; in small trees in corn fields and in murguete which is found in the drier spots of the arroyo. They do not occur in the thick riparian vegetation closely bordering the river, being rather in the [illegible] vegetation a short distance back from the river. I hunted for about two hours in thick, dense riparian willows and grasses without finding the worms. I am also satisfied that these worms do not occur in the cordon-murguete association on the slopes. They seem to be rather evenly distributed throughout the arroyo, although I note a tendency for them to occur about the forms, especially in the young black walnut trees. On several occasions I watched single birds or small groups (usually 3-4 birds, rarely more) foraging in small willow trees not far from the river. I noted nests which resembled that of C. brunneisupplies about 15 feet above the ground in