43G NORTH AMERICAN BIRDS. 



Dr. Xewl)eiTy observed this species quite common in California, but could 

 obtain no specimens; owing to the lieiglit at which they tiew. He saw noth- 

 im: of it in Oregon. 



Two specimens of this species obtained in Mexico by M. d* MUissure are 

 in the collection of Dr. Sclater. 



Mr. Itidgway saw on the Tiuckee Iliver, near Pyramid Dike, in May, 

 18()8, what he supposes to have been thi^species. It was not common, 

 only a few individuals being observed every evening just before dusk, Hying 

 overhead exactly in the manner of Chimney Swallows {C. pelayica), which 

 they also exactly resembled in appearance. They Hew so high that speci- 

 mens could not be obtained. They were entirely silent, and appeared at no 

 other time than in the evening, in these respects differing strikingly from 

 the eastern species. 



