298 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Picoides americanus, var. dorsalis Allen, Bull. Mus. Comp. Zool., iii, 1872, 163 

 (Mt. Lincoln, Colorado), 180 (mts. of Colorado above 8,000 ft.). — Henshaw, 

 Zool. Exp. W. 100th Merid., 1875, 391 (mts. near Ft. Garland, South Park, 

 Pagosa, and Rio Grande, Colorado; White Mts., Arizona, Oct.). — Scott, 

 Bull. Nutt. Orn. Club, iv, 1879, 95 (Twin Lakes, Colorado). 



Picoides americanus . . . var. dorsalis Coues, Check List, 1873, no. 301a. 



[Picoides americanuB.] b. dorsalis Coues, Birds Northwest, 1874, 285. 



Picoides tridaetylus, var. dorsalis Ridgway, Bull. Essex Inst., v, Nov., 1873, 185 

 (Colorado), 194 (Colorado; crit.). 



Picoides tridaetylus dorsalis Ridgwat, Proc. U. S. Nat. Mus., iii, March 27, 1880, 

 7, 189; Norn. N. Am. Birds, 1881, no. 368o.— Deew, Auk, ii, 1885, 17 (Colo- 

 rado, breeding at 8,000-12,000 ft.).— Henshaw, Auk, iii, 1886, 78 (upper 

 Pecos R., New Mexico, resident). 



Picoides americanus, ^. dorsalis Ridgwat, Field and Forest, i, June, 1877, 209 

 (Colorado). 



Picoides americanus dorsalis Deew, Bull. Nutt. Orn. Club, vi, 1881, 141 (San 

 Juan Co., Colorado). — (?)Williams, Bull. Nutt. Orn. Club, vii, 1882, 62 

 (Belt Mts., Montana). — Coues, Check List, 2d ed., 1882, no. 445. — Ameeican 

 Oenithologists' Union, Check List, 1886 (and 2d ed., 1895), no. 4015; 3d 

 ed., 1910, 190. — Mbaens, Auk, vii, 1890, 252 (San Francisco Mt., Arizona, 

 breeding in pine and spruce belts; habits, etc.). — ^Meeeiam, North Am. 

 Fauna, no. 3, 1890, 92 (San Francisco Mt., in spruce and balsam belt). — 

 Richmond and Knowlton, Auk, xi, 1894, 303 (Gallatin R., s.-centr. Mon- 

 tana, 7,200 ft., Aug.).— Bendiee, Life Hist. N. Am. Birds, ii, 1895, 80.— 

 Cooke, Bull. Col. Agric. Coll., no. 37, 1897, 83 (Colorado, resident, 8,000- 

 12,000 ft.).— Bangs, Auk, xvii, 1900, 135 (crit.).— Hendbeson, Univ. Colo. 

 Studies Zool., vi, 1909, 231 (mts. of Colorado, resident). — Saundees, Auk, 

 xxviii, 1911, 37 (Gallatin Co., Montana); Condor, xiv, 1912, 26 (Silver Bow 

 and Jefferson counties, Montana). — Jewett, Condor, xiv, 1912, 192 (Saw- 

 tooth Mts., Idaho, 7,500 ft., Nov.). 



P[icoides] a[mericanvs] dorsalis Coues, Key N. Am. Birds, 2d ed., 1884, 485. 



P[icoides] americanus dorsalis Ridgway, Man. N. Am. Birds, 1887, 287. 



Picoides arcticus . . . var. dorsalis Henshaw, Rep. Orn. Spec. Wheeler's Surv., 

 1874, 89 (mts. near Ft. Garland, 10,000 ft., and South Park, Colorado, June). 



Picoides arcticus dorsalis Bailey (Florence M.), Auk, xxi, 1904, 353 (upper Pecos 

 R., New Mexico, 11,600 ft., breeding.) 



Picoides tridaetylus, var. americanus (not Picoides americanus Brehm) Baied, 

 Beewbe, and Ridgwat, Hist. N. Am. Birds, ii, 1874, 532, part. 



PICOIDES ARCTICUS (Swainson). 



BLACE-BACEED THSEE-TOED WOOBPECEEB. 



Adult male. — Crown bright yellow (canary yellow or naples yellow 

 to orange) ; rest of pileum, except (usually) extreme anterior portion 

 of forehead, together with orbital, superciliary, and auricular regions, 

 hindneck, and sides of neck, uniform glossy blue-black; rest of upper 

 parts black, or sooty black, the scapulars and interscapulars broadly 

 margined with glossy blue-black, the lesser wing-coverts narrowly 

 margined with the same, the middle wing-coverts and upper tail- 

 coverts margined with deeper black than central portion; outer webs 

 of remiges, except inner or proximal secondaries ("tertials") spotted 

 with white; four middle rectrices black, the next pair mostly black, 



