PASSEEES— TYEANNIDAE— CONTOPUS PERTINAX. 



351 



the actions of several pairs, I felt sure that certain thick, tall fir trees had 

 been selected as the sites of their nests, but these I was not able to detect, 

 and I do not think that the nest is finished and the eggs deposited much, if 

 any, before the latter part of June. 



We found it almost as numerous in Eastern Arizona, quite far to the 

 south, as in Colorado ; but I had supposed that it was only thus present 

 during the migi-ations. The past season, however, specimens were taken 

 near Camp Apache in July, which doubtless were breeding, and later, about 

 the middle of August, young and old were secured near Camp Bowie, within 

 one hundred miles of Mexico. Its replacement, therefore, in this region 

 by Contopus pertinax would appear to be only pai-tial, and the two breed in 

 the same districts. 



CONTOPDS PEETINAX, Cab. 



Coues' Flycatcher; Mexican OliTc-sided Flycatcher. 



Gontopus pertinax, CAB. ct Hein., Mus. Hein., ii, 72— Coxies, Proc. Acad. Nat. Sci. 

 Pbila., 18GG, GO (Fort Whipple, Ariz.).— CooPER, Birds Cal., 1S70, 324.— 

 CouES, Key N. A. Birds, 1872, 173.— Bd., Brew., & Eidg., N. A. Birds, ii, 

 1874, 35G, pi. 44, f. 2.— CouES, Birds Northwest, 1874, 259. 



This has generally been regarded as a Mexican species ; its only claim 



/-y 



