LLWOLF 1963 Aimophila humeralis August 7 1 mi. SE. Azucar de Matamoros, Puebla, Mexico Only 2 pair found in this thorn forest locality. Pair I saw was at crest of hill in closed canopy vegetation. Herb layer + small shrubs were probably as dense as they were anywhere on the hills. Also found 2 spaced pair of A. mystacalis in same area. 1 M. S. OF PIAXTLA, PUEBLA, MEXICO J.P. Housard A pair and one juvenile observed foraging in rank herbaceous growth bordering a field in a stream bottom. My attention was attracted to the group by the chipping of the adults. The presumed ♂ gave a Passerina-like single chip (ie, loud & metallic) and the presumed ♀ softer, lower-pitched doubled or trebled chips. The juvenile was not observed to call. Numerous dead limbs protruding above vegetation (which was about 1 foot high) afforded places for perching and for entering and leaving the herbaceous layer. Progress over the limbs was made by agile hops and once the ♀, while perching on a dead twig, leaned reached upward and removed an object from the underside of a