COUES ON BIRDS OF DAKOTA AND MONTANA. 575 



VIREO PHILABELPHICUS, Cass. 



Brotherly-love Vireo. 



This appears to be a species which, like the Mourning Warbler and 

 some others, is more abundant in the interior, and especially in the 

 Mississippi Valley, than in the Atlantic States. It was originally 

 described, a few years since, from the vicinity of Philadelphia, as indi- 

 cated by its name, and has been justly esteemed as rather a rare bird 

 in the Eastern and Middle States, though its great similarity to V. gil- 

 vus may be a cause of its being partially overlooked. In New England, 

 it has been found on two or three occasions, and Dr. Brewer informed 

 me of its abundance in Wisconsin during the latter part of May. Mr. 

 T. M. Trippe in querying F. gilvus as found by him in Minnesota, prob- 

 ably had the ])resent species in view. It undoubtedly breeds about 

 Pembina, in the heavy timber of the river-bottom, but I was not so 

 fortunate as to discover its nest, a circumstance the more to be re- 

 gretted since neither the nest or eggs have as yet come to light. 



List of specimms. 



VIREO GILVUS, {Vieill.) Bp 



Warbling Vireo. 



Observed in abundance at Pembina, and again fouud at the opposite 

 extremity of the Line, the specimen captured in the Rocky Mountains, 

 however, bwug probably of the slight variety swainsoni. At Pembina, 

 the Warbling Vireo was in full song and breeding in June. A nest 

 found on the 11th of that month was still empty; but in this latitude 

 few of the small insectivorous birds appear to lay before the third 

 week in June. 



List of specimens. 



