BIRDS OF NORTH AND MIDDLE AMERICA, 



697 



Length (skins), 1(M>-U5(1 1(>); wing, <;()-65 (62); tail, 43.5-47.5 (44.9); 

 exposed i-ulnien, 1M>.5 (<).2); tarsus, 18-19 (18.7); middle toe, 9-11 

 (10.2).« 



Western Alaska (St. Michael, Nushagak, Alloknagik River, Kowak 

 River, etc.); inlgrating in winter to Southeastern Asia, ))ut by what 

 route and to what countries not yet determined.'' 



I'ln/llopniuxle kennicotti Baird, Trans. Chicago Acad. Sci., i, 1869, 31.3, pi. 30, 

 " fig. 2 (St. Michael, Alaska; coll. U. S. Nat. Mus.). 



I'hlljllujjseiif^tes'] boreal (!< kennicotti Stejukgeh, Bull. U. S. Nat. Mus., no. 29, 1«H.5, 

 303, in text. 



[^Phi/llupneuste] borealis (not of Blasius) Coues, Key N. Am. Birds, 1872, 77. 



Phj/llopneuste borealis Coues, Check List, 1873, no. 20. — Baird, Brewer, and 

 RiDGWAY, Hist. N. Am. Birds, i, 1874, 70, pi. 5, fig. 5. 



Pliylloscopus borealis Ridgway, Proc. U. S. Nat. Mus., 1880, 215; Nom. N. Am. 

 Birds, 1881, no. 34.— Seebohm, Cat. Birds Brit. Mus., v, 1881, 40, part (in 

 synonymy). — Coues, Check List, 2d ed., 1882, no. 32. — Nelson, Cruise "Cor- 

 win" in 1881 (1883), 60 (St. Michael, Alaska). 



I'llnjlloscojms'] borealis Coues, Key N. Am. Birds, 2d ed., 1884, 259, part. 



Phyllopseustes borealis Stejneger, Bull. U. S. Nat. Mus., no. 29, 1885, 302, part 

 (Alaskan references, etc.). — American Oknithologists' Union, Check List, 

 1886, no. 747, part— Townsend (C. H.), Auk, iv, 1887, 13 (Kowak R., 

 Alaska). — Grinnell, Pacific Coast Avifauna, i, 1900, 60 (Kowak R. ; habits). — 

 McGregor, Condor, iv, 1902, 144 (Signal Cairn, Norton Sound; habits). 



P[}ii)Uopseusies'] borealis Ridgway, Man. N. Am. Birds, 1887, 567, part. — Coues, 

 Key N. Am. Birds, 5th ed., i, 1903, 261, part. 



(?) Phylloscopnts trocliiins (not Motaeilla trochilus Linnseus?) Pleske, Ornitho- 

 graphia Rossica, ii, pt. 2, 1889, 229 (Bering Sea).<^ 



« Seven specimens, none of them with sex determined. 



Thi'se Alaskan specimens, compared with series of both sexes from eastern Asia, 

 compare in average measurements as follows: 



All the Asiatic males measured are from theCommander Islands and Petropaulovsk, 

 Kamchatka; tlie females are from China, Burma, Siam, Philippines, etc., and jiossi- 

 bly include some specimens belonging to the Alaskan form, taken as migrants. The 

 smallest Asiatic specimens are from Chance Island, Siam (wing 60, tail 43) , and Kow- 

 loon, China (wing 63.5, tail 45). 



''The range of A. b. borealis is as follows: 



Bri't'ding in arctic districts of the Pahearctic Region, from Finmark to Kamchatka 

 (including Commander Islands), an<l in subalpine districts of southeastern Siberia 

 and IMongolia; migrating southward through China (coastwise), Japan, an<l Formosa 

 to the Philij)pines, i\Ialay Archipelago, ^lalacca, Tenasserim. and South Andaman 

 Islands; accidental in Heligoland. 



'"Specimen in the St. Petersburg Academy nuiseum (no. 10861) coUuctetl by AVos- 

 nessensky in Bering Sea August 24, 1843. 



