24 Nelson — North American Mainland Myiarchus. 



I m I II ji — qwiNwifciww*! 



a 





^ 'W l I I I ' I wM ^i— <— i3*w 



<z 



Fig. 1. Outer tail feathers of American Mainland Myiarchus. 



a. Myiarchus cinerascens. c. Myiarchus n. inquietus. 



b. Myiarchus nuttingi. d. Myiarchus mexicanus. 



