COUES ON BIRDS OF DAKOTA AND MONTANA. 655 



GRACULUS DILOPHUS, Sic. 

 Double-crested Corbiorant. 

 Once observed on the Red River, near Pembina, late in May. 



LARUS ARGENTATUS SMITHSONIANUS, Coues. 



American HERRma Gull. 



A specimen was shot by Mr. J. H. Batty near Fort Benton, Mont. 

 Some of the large Gulls observed in September during our boat voyage 

 down the Missouri may have been of this species, but all that were fully 

 identified were L. delawarensis. 



List of specimens. 



LARUS DELAWARENSIS, Orel 



Ring-billed Gull. 



A considerable flock of this species was seen hovering over Riviere de 



Lac about the middle of September, and two specimens were secured. It 



was not again identified to my satisfaction until the following season, 



when it was seen in considerable numbers on a large pool close by Chief 



Mountain. 



List of spedmens. 



LARUS FRANKLINI, Rich. 



Franklin's Rosy Gull. 



The egg of this species has been described by Prof. Alfred Newton, 

 from a specimen taken in the adjoining British Province of Manitoba, 

 and a specimen was shot on Turtle Mountain July 30, fully fledged, yet 

 80 young that I judged it had been hatched not far from the spot. No 

 breeding colonies, however, of this or indeed any other Gull were 

 observed by me in any portion of the region surveyed. 



