1919- CATALOGUE OF BIRDS OF THE AMERICAS CORY. 499 



of southern California, east to south-central Oregon and eastern slope 

 of the Sierra Nevada Mts. ; south in winter to Lower California. 

 ii : California (Palo Alto 4, Clipper Gap 6, Willow Creek i). 



*Sphyrapicus thyroideus thyroideus (Cassin). WILLIAMSON'S WOOD- 

 PECKER. 



Picus thyroideus CASSIN, Proc. Acad. Nat. Sci. Phila., 1851, p. 349 (California). 



Sphyrapicus thyroideus MALHERBE, Mon. Picidae, I, 1861, p. 162, part (Cali- 

 fornia); III, 1861, p. 37, fig. i; RIDGWAY, Bull. U. S. Nat. Mus., NO.*SO, 

 VI, 1914, p. 286, part (California and southern British Columbia). 



Sphyropicus thyroideus HARGITT, Cat. Bds. Brit. Mus., XVIII, 1890, p. 196, 

 part (California, Oregon). 



Sphyrapicus thryoideus thryoideus SWARTH, Condor., XIX, 1917, p. 64 (Cal- 

 ifornia, Oregon, British Columbia). 



Range: Southern British Columbia, Washington, Oregon and 

 southward to southern California; Mexico in winter? 

 2: "California." 



*Sphyrapicus thyroideus nataliae* (Malherbe). ROCKY MOUNTAIN 

 WOODPECKER. 



Picus natalice MALHERBE, Journ. fur Ornith., 1854, p. 171 (Mexico). 



Sphyropicus thyroideus HARGITT, Cat. Bds. Brit. Mus., XVIII, 1890, p. 196, 

 part (Colorado, New Mexico, Arizona, Mexico). 



Sphyrapicus thyroideus RIDGWAY, Bull. U. S. Nat. Mus., No. 50, VI, 1914, p. 

 286, part (Arizona, New Mexico, Colorado, Wyoming, western Texas, 

 Mexico). 



Sphyrapicus thyroideus nataluR SWARTH, Condor, XIX, 1917, pp. 63, 65 (Col- 

 orado, New Mexico, Arizona, Mexico). 



Range : Rocky Mountain region ; Colorado, Wyoming, New Mexico, 

 Arizona; and in winter to western Texas and southward in Mexico to 

 Durango and Jalisco. 



8: Mexico (Chihuahua 5); Colorado (Evergreen i, "Colorado" i); 

 New Mexico i. 



Genus PICOIDES Lacepede. 



Picoides Lacepede, Tableau Ois., 1779, p. 9 (Type, as fixed by Gray, 1840, 

 Picus tridactylus Linnaeus). 



*Picoides americanus americanus Brehm. THREE-TOED WOODPECKER. 



Picoides americanus BREHM, Handb. Vogel Deutschl., 1831, p. 195 (Amerika); 

 MALHERBE, Mon. Picidae, I, 1861, p. 176; III, 1861, pi. 39, figs. 1-2; BAIRD, 

 BREWER and RIDGWAY, Hist. N. Am. Bds., II, 1874, pi. 50, fig. 2; HARGITT, 

 Cat. Bds. Brit. Mus., XVIII, 1890, p. 279 (New York.etc.). 



Differs chiefly in size of bill, which in this race is smaller and shorter, and 

 while the difference is not very pronounced, it seems to be constant. 



