22 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



(b) With pure yellow shafts, etc., of auratus combmed with red 

 malar stripe of cafer. 



(c) Similar to C. cafer coUaris, but having either the red nuchal 

 mark or vinaceous throat, or both, of C. auratus. 



(d) Similar to C. cafer collaris, but having black feathers in the 

 red malar stripe. 



(e) Similar to C. auratus luteus or C. a. horealis, but having more 

 or less red in the black malar stripe. 



(/) Similar to C. auratus luteus or C. a. horealis, but with red or 

 orange colored feathers mixed with the yellow ones in wing and tail. 



(g) Similar to C. cafer collaris, but with yellow feathers mixed 

 with the red ones in wing and tail. 



Besides the above styles, every possible combination or mixture 

 of the color characters of the two species is represented in other 

 individuals. 



As a rule, these hybrid specimens have a paler coloration than 

 those of either of the parent forms." 



Western portion of the Great Plains, from southwestern Saskatch- 

 ewan to western Texas, or the area of overlapping of the respective 

 ranges of C. auratus horealis or C. a. luteus and C cafer collaris; 

 casual, or of irregular occurrence, in British Columbia, Oregon 

 (Camp Harney), California * (San Francisco; Stockton; Cosumnes 

 River; Calaveras County; Marysville; etc.), Nevada (Washoe Valley; 

 West Humboldt Mountains), Arizona (Fort Whipple), eastern 

 Kansas (Topeka; Lawrence), Illinois (Warsaw; Mount Carmel); 

 New York (Orange County; Fort Hamilton), Louisiana (Plaquemine 

 Parish), etc. 



Picus ayresii Audubon, Birds Am., oct. ed., vii, 1844, 348, pi. 494 (near Ft. 

 Union, upper Missouri R.; type now in coll. U. S. Nat. Mus.). 



Colaptes ayresi Bonaparte, Consp. Av., i, 1850, 113. — Hargitt, Cat. Birds Brit. 

 Mus., xviii, 1890, 22 (Brit. Columbia; Stockton and San Francisco, California; 

 Pueblo, Colorado). 



[Colaptes] ayresi Bonaparte, Ateneo Italian©, ii, 1854, 126. — Sharpe, Hand- 

 list, ii, 1900, 201. 



Picus ayresi De Kay, Nat. Hist. N. Y., ii, 1844, 194. 



C[olaptes] ayresii Reichenbach, Handb. Scans. -Picinae, 1854, 413, pi. 666, 

 fig. 4421. 



Colaptes ayresii Baird, Rep. Stansbury's Surv. Gt. Salt Lake, 1852, 333 (Ft. 

 Union).— Heermann, Joum. Ac. Nat. Sci. Phila., ii, 1852, 270 (mts. near 

 Cosumnes R., California, 2 specs.). — Gray, List Birds Brit. Mus., Capit. 

 and Picid., 1868, 120. 



o For special discussion of this hybrid series see the following: Baird, Rep. Pacific 

 R. R. Surv., ix, 1858, 122-124.— Coues, Birds of the North-West, 1874, 293, 294.— 

 Ridgway and Belding, Proc. U. S. Nat. Mus., i, 1879, 430-432.— Allen, Bull. Am. 

 Mus. N. H., i, 1892, 21-44.— Rhoads, Science, xx, 1892, 325-327. 



& Some California specimens are doubtless hybrids of C. auratus horealis and C. 

 cafer saturatior, whose respective ranges adjoin in northern British Columbia and 

 eouthem Alaska. 



