List of 1963 Aimophila mysticalis August 7 9 mi. SE. Jarcer de Matamoros, Puebla, Mexico. #2196 - brood patch - body plumage fresh. 2197 - little back molt. rectrices #1, #6, + #5 (right) 1/2 grown. body plumage fresh. cl. prot. sl. eul. 3198 - brood patch - post-juv. adult - had white med. thr stripes 1201 - brood patch back molt rt #6 + #5 rectrices 1/2 grown. body plumage fresh. #2195 - heavy molt on back + crown. also meeting something coverte. On relatively open thorny tree - covered hillsides. Occur from relatively open to cloud canopy vegetation. There seems to be no real difference in taller vegetation to compare with A. humeralis habitat except there were large cacti growing on the hillsides. The herb layer was relatively sparse (<50%) + much of that present was thorny. Besides being more generally arid, this differnce in herb layer vegetation may account for lack of humeralis or maybe both. the abundance of mysticalis. Saw mysticalis in groups of 2 or 3. From one group of 3 collected an adult & a juvenile just finishing the post-juv. molt. Probably the other group of 3 was also a family group. Groups of 2 were undoubtedly pairs. One such group collected was a & F. Apparently mysticalis has either a long breeding season with pairs out of synchrony or else they are