708 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Adult maZ^'.— Length (skins), 139-168 (155); wing, 157.5-175 

 (165.8); tail, 53-66 (61); exposed culmen, 6-7.5 (6.8); tarsus, 12-13.5 

 (12.9); middle toe, 10-10.5 (10.2).« 



Adult female. —Length (skins), 137-160 (147); wing, 156-164 (160); 

 tail, 47-58.5 (52.5); exposed culmen, 6.5-7 (6.9) ; tarsus, 12-13 (12.5); 

 middle toe, 9-10.5 (9.6).'' 



Western North America and southward to southern Mexico (to 

 Guatemala?) ; north to British Columbia (Victoria; New Westminster; 

 Ashcroft; Sumas; Kamloops; Vernon; Lake La Hache; Comox; 

 Okanogan; Clinton; Caribou District; Chilliwack; Lula Island) and 

 southern Alaska (Revillagigedo Island; Boca de Quadra), eastward 

 to Colorado and New Mexico, southward to Lower California (San 

 Quintin; San Carlos Landing; San Telmo; San Pedro Martir Moun- 

 tains), and southern Mexico, in States of Vera Cruz (Orizaba; Jalapa; 

 Jico), Tlaxcala (Laguna del Rosario), Mexico (Rio Seco near Cor- 

 dova), Puebla (San Miguel Molino), Durango (Huasamota), and 

 Oaxaca (Guichicovi) and Territory of Tepic (Sierra Madre; Santa 

 Teresa) to highlands of Guatemala (Raxche; Coban; Duehas; Alo- 

 tenango) and Honduras.^ 



Cypselus borealis Kennerly, Proc. Ac. Nat. Sci. Phila., ix, 1857, 202 (vSimiahmoo 



Bay, Washington; coll. U. S. Nat. Mus.). 

 Nephoecetes borealis Sclater, Proc. Zool. Soc. Lend., 1859, 236 (Vancouver Island). 

 Cypseloides borealis Sclater, Proc. Zool. Soc. Lond., 1865, 615 (Puget Sound; 



monogr.); Journ. fiir Orn., 1867, 138. 

 [Chxtura] borealis Gray, Hand-list, i, 1869, 68, no. 785. 

 Nephacetes niger borealis Ridgway, Bull. Essex Inst., vii, Jan., 1875, 17, 38 



(Pyramid Lake Reservation, Nevada). — Coues, Check-list, 2d ed., 1882, no. 



404. 

 N[eph(je.cetes] niger borealis Coues, Key N. Am. Birds, 2d ed., 1884, 457. 

 [Nephcecetes] niger var. borealis Coues, Key N. Am.' Birds, 1872, 183. 



o- Ten specimens. 



b Nine specimens. 



c I have not seen specimens from Guatemala or Honduras, and therefore can not 

 be sure that they are referable to this northern form. 



