DIAGNOSIS OF THE KAMTSCHATKAN THREE-TOED WOODPECKER 

 (PICOIDES ALBIDIOR). 



BY LEONHARD STEJNEGER. 



Iii my "Synopsis of the Birds reported to inhabit Kaintschatka " 

 (Bulletin U. S. Nat. Mus., No. 29, p. 321), I based the name Picoides 

 albidior on some remarks by Prof. L. Taczanowski (Bull. Soc. Zool. 

 France, 1S82, p. 39G). Through the kindness of my friend, the late 

 ( !ap1 . E. Hunter, of Petropaulski, specimens of the bird in question have 

 come in my possession. A brief formal diagnosis, therefore, may not 

 be out of place. 



Picoides albidior Stejn. 



Diagnosis. — Center of back, whole under side, including flanks and 

 crissum, and under wing coverts, pure white, without black stripes or 

 bars ; outer rectrices white at tip without black cross-bars. 



Dimensions. — Wing, 120 mi " ; tail-feathers, 78 mm ; exposed culmen, 



24:""". 



Habitat. — Kaintschatka. 

 Type.—U. S. Nat. Mus. No. 110,000. 

 Synonymy: 



1858.— Picas tridaetylus Kittlitz, Denkw. Reise, 1, pp. 327, 329 nee (Linn.). — 



GuiLLEMARD, Cruise Marchesa, I, p. 90 (1886). 

 1882. — Picoides crissoleucoa Taczanowski, Bull. Soc. Zool. Frauce, 1882, p. 39G 



(nee Reichenb.). — Dybowski, Bull. Soc, Zool. France, 1883, p. 368. 

 1885. — Picoides albidior Stejneger, Res. Ornith. Expl. Kamtscb., p. 321.— ft?., 



in Guillem, Cruise Marchesa, I, p. 277 (1886).— Id., Mitth. Ornitk Yereiu 



Wien, xi, 1887, p. 132. 

 Proceedings U. S. National Museum, Vol. ~X1. 



