49 5 mi. N Tehuacan, 1676 m. May 26 also in the rows of yucca and , importantly, in the tall trees in the flat land, including those surrounding the marshy area. They seem more common in the latter habitat type than on the slope. Nests are placed in all types of vegetation - mesquite, yucca, "olive- like" tree, "orange-leafed" trees, with seemingly no species preference. They were one in small groups. At one nest placed 30 feet up in a "orange-leafed" tree along an irrigation ditch I collected 3 birds (see catalog) as they came individually to the nest. I collected another in a mesquite tree a short distance away and later heard another call in some general area - so 5 birds probably centered about this nest. As I watched, two birds of this group were together on a tuna - they gave a cha-cha-cha - repeated swiftly, and with posturing of similar type given by bunmles. Later one of these birds flew and in a short tonic a third bird flew up on the tuna where the same performance was repeated. About 70 yds away, 30 feet up in a thick-leafed tree there was another nest and about this centered another group of 4-5 weas, several of which I collected at different times during the day. In the same general area I came upon a group of 4 (probably more) in a row of tall trees along a path. Examined one empty nest placed in a small tree about 9 feet up but found no eggs.