COUES ON BIRDS OF DAKOTA AND MONTANA. 



567 



DENDRCECA MACULOSA, {Gm.) Bd. 



Black- AND- YELLOW Warbler. 



Specimen from Woody Mountaiu, seen in Mr. Dawson's collection. 



SIURUS NJ5VIUS, {Bodd.) Coues. 



Water Turush. 



During the progress of the jSTorthwest Boundary Survey, with which 

 the work of the present Commission connected, the Water Thrush was 

 observed in Washington Territory ; and since that time its very geuei'al 

 range throughout ISTorth America has been demonstrated, though the 

 bird was long supposed to be, like iS. motacilla^ a species of the East- 

 ern Province. A specimen was secured in August west of the Sweet- 

 grass Hills, on the headwaters of Milk Eiver. This was the only indi- 

 vidual procured during the expedition, and seemed to be somewhat out 

 of place, since the species frequents, for the most part, moister and 

 better-wooded regions. It was again observed, however, in the under- 

 growth surrounding some reedy pools near Chief Mountain. 



List of specimens. 



GEOTHLYPIS TRICHAS, {Linn.) Cah. 



Maryland Yellow-throat. 



Observed, at Pembina, on Turtle Mountain, and in the Rocky Mount- 

 ains, but not in the open country between these points. The species is 

 one of general distribution in the United States in all suitable localities, 

 and appears to breed indifferently in any latitude within these limits. 

 The Northern Boundary may be not far from the line of its dispersion in 

 this direction. 



List of specimens. 



