50 XuRMAX A. W(XJD 



The species was not found at any of the localities visited except Cando, 

 Towner Count}-, where a typical one was taken, June 3, 192 1. 



167. Chordciles virginianus henryi Cassin. Western Nighthawk. 



Allkn, 1874, P- 62; everywhere quite common. CouES, 1878, p. 138; the birds 

 of the arid Missouri region are referable to the variety henryi. Hoffman", 1882, p. 

 401; common until the 20th of September. Judd, 1917, p. 20; intermingling and 

 breeding witli znrginianus. 



168. Chordciles virginianus sennetti Coues. Sennett's Nighthawk. 



Bishop, i8<56, pp. 134-135; a series of ten adult male nighthawks [now in tha 

 American Museum] from Towner and Rolette counties, North Dakota, all closely 

 resemble the type specimen, Number 4927 from the George B. Sennett Collection. 

 RiDGWAY. 19x4, p. 569; Fort Union, Pembina, Fort Rice, Towner County, Devils 

 Lake, Indian Reservation, Pierce County, Rolette County and Nelson County, Fort 

 Berthold, North Dakota. 



Specimens taken in Ransom, Ramsey, Bottineau, and Williams counties 

 were referred to this species by the writer, who believes it to be the pre- 

 dominating nighthawk in North Dakota. 



All the nighthawks are very beneficial, living principally on mosquitoes. 



169. Chaeiura pelagica (Linnaeus). Chimney Swift. 



AxLEN, 1875, p. 62; common along the Missouri at Fort Rice, June, 1873. Coues, 

 1878, p. 614; common at Pembina and westward only to the Mouse River. Specimens 

 taken at Pembina, June 2 to 24, and Mouse River, August 27, 1873. Hoffman, 

 1882, p. 401; saw no specimens in September, though nests were found in several 

 places. Judd, 1917, p. 20; a rare straggler, does not occur every year. Freeman. 

 1919, p. 13; common summer resident, Fargo, April 27. 



At Devils Lake this species was first seen on May 20, 192 1, and through- 

 out the summer, as a pair nested in the big chimney of the station. This 

 was the only locality I noted for the species, which is no doubt rare over 

 most of the state. 



170. Archilochus colnhris (Linnseus). Ruby-throated Hummingbird. 



Coues, 1878, p. 614; quite common at Pembina, not seen west of this point. 

 Male taken June 5, 1873. Judd, 1917, p. 20; not uncommon on prairies. Common 

 and breeds in the Turtle Mountains. Freeman, 1919, p. 13 ; common summer resi- 

 dent. 



This species was not rare after May 20, 192 1, and is quite generally 

 distributed over the state. 



171. Tyrannus tyranniis (Linnseus). Kingbird. 



Coues, 1878, p. 608; extremely numerous at Pembina. Specimens taken from 

 June 2 to June 28, 1873. Judd, 1917, p. 20; a very common summer resident. 



The species was common after May 20, 1921, at Devils Lake, and was 

 found in numbers in all parts of the state visited. 



172. Tyrannus verticalis Say. Arkansas Kingbird. 



Coues, 1897, p. 56; Audubon says on June 25, 1843, Harris brought in several 

 Arkansas flvcatchers (kingbird) at Fort Union: p. 86; on July 13 Audubon shot seven 



