48 



BULLETIN 



UNITED STATES NATIONAL MtTSEUM. 



very closely resembling the adult male of GJiordeiles virgvnianus 

 henryi; or even to a lighter brown, very much mottled (No. 6819, 

 J. Grinnell, Bluff Lake, San Bernardino Mountains, California, 

 July 22, 1905), like the male of Ohordeiies virginiaavus howelli. 



As in Ohordeiies mrginianus virgimanua, there is little or no geo- 

 graphical variation in this race. Breeding birds from southern Cali- 

 fornia seem to be practically identical in both color and size with 

 those from northern Califorma, Idaho, western Montana, and other 

 parts of the breeding range. Breeding birds from Nevada seem to 

 be all Ohordeiies v. hesperis, and identical with California specimens. 

 One breeding example from the Hood Eiver, Oregon (No. 156571, 

 U.S.N.M., June 21, 1897), looks like Ohordeiies virginianus virgini- 

 anus; but others from North Dalles and Fort Steilacoom, Washing- 

 ton, from Heppner and the John Day Eiver, Oregon, are surely Ohor- 

 deiies V. hesperis; and while all the breeding birds available from 

 Oregon and southern Washington are somewhat intermediate between 

 0. V. virginianus and 0. v. hesperis, they are much nearer the lat- 

 ter. A single specimen from the Milk Eiver, at latitude 49°, Mon- 

 tana (No. 67646, U.S.N.M., July 24, 1874), others from the Sun 

 Eiver and elsewhere in western and central Montana, as well as 

 southern Idaho, are practically indistinguishable from California 

 examples of Ohordeiies virginianus hesperis. One half-grown, bird 

 in Juvenal plumage from the Upper Geyser Basin, Yellowstone Na- 

 tional Park, northwestern Wyoming (No. 62256, U.S.N.M., Aug. 20, 

 1872), is apparently the present form, being much too grayish for 

 Ohordeiies virginianus howelli,^ and too dark for OhordeUes vir- 

 ginianus sermetti. Breeding birds from Trail, southeastern British 

 Columbia, close to the boundary of the State of Washington, verge 

 toward Ohordeiies virginianus virginianus, but are decidedly nearer 

 OhordeUes v. hesperis. A series of breeding specimens from Maple 

 Creek, southwestern Saskatchewan, and two individuals from Indian 

 Head, Saskatchewan, incline somewhat toward Ohordeiies v. sen- 

 netti, but are clearly the present form. Average measurements of 

 breeding specimens from different parts of the range compare as 

 follows : 



Localities. 



Wing. 



Tail. 



Exposed 

 culmen. 



Tarsus. 



Middle 

 toe. 



Five males, from southern California. . . 

 Five males, from Oregon and Montana. 

 One male, from Utah 



Five females, from southern California. 

 Five females, from Oregon and Idaho. . 

 Oi» female, from Utah 



mm. 

 200 

 200 

 195 



194.1 

 195.6 

 187 



mm. 

 113.5 

 112.2 

 107.5 



112.5 

 U1.9 

 108 



mm. 

 7.2 

 6.7 



mm. 

 ' 14.3 



14.4 



15 



14 

 15 

 14.5 



mm. 

 14.7 

 14.8 

 16 



15 



15.6 



16.3 



1 See p. 57. 



