BIRDS — CAPRIMULGIDAE — CHORDEILES HENETI. 



153 



As a summary of the whole subject, I am inclined to think that all the varieties described 



belong to one species, varying somewhat with the locality, those from the Atlantic and, perhaps. 



Pacific regions being darkest, without much mottling ; those from the interior province, or from 



the Missouri to the Eocky Mountains, being much more varied, with a tendency to pale grayish 



tints in northern localities, and reddish in more southern, the latter of smaller size. In this 



generalization I would scarcely except the C. henryi. The C. texensis is, however, quite 



different. 



List of specimens. 



Catal. 

 No. 



4292 

 1522 

 1605 

 6964 

 55^2 

 7529 

 6006 

 6007 

 6008 



6555 

 5595 

 5593 

 5201 

 5202 

 5203 

 5594 



8877 



8878 



?6013 



Sex. 



Locality. 



Dark variety. 



Calcasieu, La 



Carlisle, Pa 



do 



St. Louis 



Kansas 



Independence, Mo 



Fort Steilacoom, W. T.. . 



Cosumnes river, Cal 



Tulare valley, Cal 



Pale variety. 



PortKiley 



70 miles west of Ft. Riley. 

 85 miles west of Ft. Riley. 

 40 miles above Ft. Pierre.. 



do do 



do do 



Bridger's Pass 



Fort Laramie 



.do.. 



Black HUls? (Camp 4).... 



Loup Fork 



LosNogales, Sonora 



When collected 



May 16, 1846 

 June 10,1844 

 May 13, 1857 



-, 1857 



June 30,1856 

 June 30,1866 

 June 30,1856 

 May 30,1856 



do 



August 13, 1856 

 Sept. 16, 1857 

 , do 



Sopt. 7,1857 

 July 24, 1857 

 June — , 1855 



.Whence obtained. 



G. Wurdeman 



S. F. Baird 



do 



Lt. Bryan, U.S.A.. 



do 



W. M. Magraw 



Dr. Suckloy,U.S.A.. 



Lt. Williamson 



do 



Dr. W.A.Hammond 



Lt. F. T. Bryan 



, do 



Lt. Warren, U.S.A. 



, do 



do 



Lt. F. T. Bryan., 

 W. M. Magraw. . 

 , do 



Lt. Warren... 



do 



Major Emory . 



Orig'l 

 No. 



260 



Collected by — 



W. S. Wood . 



Dr. J. G. Cooper.. 



Dr. Heermann, 

 do 



W. a. Wood 



do 



Dr. F. v. Hayden. 



W.S.Wood. 

 Dr. Cooper . . 

 , do 



Dr. Hayden... 

 Dr. Kennerly. . 



Length 



9.50 

 9.50 



10.00 



9. 



9.25 



9.25 



9.25 



9.50 



8. '40 



8.50 



9.25 



9.25 



Extent. 



25.67 

 24.50 



24.25 



22. 



22.25 



23.25 



23. 



21. 



21.50 



20.75 



23.00 



22.25 



8.17 

 8.33 



8.00 

 8.25 

 8.20 

 7.50 

 7.70 



7.70 



8. 



7.25 



8.25 



8.25 



8.25 



7.00 



7.25 



7.50 



Young 



EyeB black. 

 Iris brown. 



Not full grown. 

 do 



CHOKDEILES HENRYI, Cass in. 



Western Night-Hawk. 



Chordeiles henryi, Cassin, Illustrations, I, Jan. 1855, 233. 



Sp. Ch. — Female similar to C. virginianus, but the upper parts much more mottled and more rufous. 

 Hab. — Rocky Mountains of New Mexico. 



The specimens hitherto collected of this species are not sufficiently perfect to admit of a 

 satisfactory description. The characteristics can only be given by comparison with C. virginianus, 

 as already described. 



The skin upon which this species was based by Mr. Cassin is a female in very poor condition 

 (6690,) and much stretched, which may account for its having been described as larger than 

 C. virginianus. This is scarcely the case, as shown by the comparative measurements of the 

 two. There is no undoubted specimen of the male bird in the collection before me from Texas, 

 the only large one, with a decidedly white patch on the throat, lacking the white marks on the 

 end of the tail. 



This species is conspicuously different from Pennsylvania specimens of O. virginianus in the 



very great amount of mottling on the upper parts, which exhibit nothing of the dark tones 



prevailing in the last mentioned skins. The predominent tint of the mottling is a yellowish 



rusty, brightest, and the blotches largest, on the scapulars. The under parts are yellowish 



20 b 



