436" NORTH AMERICAN BIRDS. 



Dr. Xewberry observed this species quite commou in California, but could 

 obtain no specimens, owing to the height at which they flew. He saw noth- 

 ing of it in Oregon. 



Two specimens of this species obtained in Mexico by M. de Saussure are 

 in the collection of Dr. Sclater. 



Mr. llidgway saw on the Truckee Eiver, near ryramid Lake, in May, 

 1S(J8, wliat lie supj^ses to have been this species. It was not commou, 

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

 overliead exactly in the manner of Chimney Swallows (C pelayica), which 

 they also exactly resembled in appearance. They flew 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 diflering strikingly from 

 the eastern species. 



