272 CHECK-LIST OF NORTH AMERICAN BIRDS. 



Range. — Breeds in the Hudsonian Zone from northwestern Alaska and 

 Mackenzie south to extreme northern British Cokimbia, Alberta, and Sas- 

 katchewan. Winters irregularly south to northern California, Arizona 

 (casually). New Mexico, and Texas; east to Minnesota. 



Lanius ludovicianus ludovicianus Linnaeus. Loggerhead Shrike. [622.] 



Lanius ludovicianus Linnaeus, Syst. Nat., ed. 12, I, 1766, 134. Based on 

 Lanius Ludovicianus, La Pie-griesche de la Louisiane Brisson, Orn., II, 

 162. (in Ludovicia = Louisiana.) 



Range. — Lower Austral Zone of the Atlantic and Gulf States from southern 

 North Carolina to southern Florida and west through southern Georgia and 

 Alabama to central Louisiana. 



Lanius ludovicianus migrans Palmer. Migrant Shrike, [622e.] 



Lanius ludovicianus migrans W. Palmer, Auk, XV, No. 3, July, 1898, 248. 

 (Kingston, Ontario [Canada].) 



Range. — Breeds chiefly in the Transition and Upper Austral zones from 

 southeastern Manitoba, southern Ontario, southern Quebec, Maine, and New 

 Brunswick south to northeastern Texas, eastern Oklahoma, Arkansas, Mis- 

 souri, southern Illinois, northwestern Pennsylvania, Kentucky, western North 

 Carolina, Mississippi, Louisiana and the interior of Virginia (but only locally 

 in the eastern states). Winters chiefly in the Mississippi Valley and Texas, 

 irregularly north to southern New England. 



Lanius ludovicianus excubitorides Swainson. White-rumped Shrike. 



[622a.] 



Lanius excubitorides Swainson, in Swainson and Richardson, Fauna 

 Bor.-Amer., II, 1831 (1832), 115 (pi. 34). (Carlton House, Saskatche- 

 wan Plains.) 



Range. — Breeds in Austral zones (locally Transition) from central Alberta, 

 central Saskatchewan, and southwestern Manitoba south to southeastern 

 California, extreme northeastern Lower California, Arizona, Texas, and north- 

 ern Mexico (to Nayarit and Durango), and from the western border of the 

 Great Basin east to long. 98°. Winters in the southwestern United States and 

 south to the Isthmus of Tehuantepec.^ 



Lanius ludovicianus gambeli Ridgway. California Shrike. [622&.] 



Lanius ludovicianus gambeli Ridgwat, Manual N. Amer. Birds, 1887, 467. 

 (Cahfornia, especially coast district = Calaveras County.) 



1 Includes L. I. sonoriensis and L. I. nevadensis A. H. Millfr (Condor, XXXII, 

 1930, 155). 



