BIRDS OF NORTH AND MIDDLE AMERICA. 251 



Adult female,— Length (skins), 159-172 (166); wing, 92-98 (95); 

 tail, 49-56 (53.6); exposed culmen, 18.5-20 (19.3); tarsus, 16.5-17.5 

 (17); outer anterior toe, 11.5-12.5 (12).« 



Tres Marias Islands (Maria Madre Island; Cleofa Island), western 

 Mexico. 



Picas lucasianus (not P. lucasanus XantuB) Finsch, Abh. Nat. Ver. Bremen, 



1870, 354, part (Tres Marias). 

 Picas scalaris (not of Wagler) Grayson, Proc. Boat. Sec. N. H., xiv, 1871, 273 



(Tres Marias) . 

 Dendrocopus scalaris Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1895,435, 



part (Tres Marias; crit.). 

 [Picas scalaris] var. graysoni Baird, in Baird, Brewer, and Ridgway's Hist. N. 



Am. Birds, ii, 1874, 501, 517, part (type from Tres Marias Islands, w. Mexico; 



coll. U. S. Nat. Mus.). 

 Picas scalaris var. graysoni Baird, Brewer, and Ridgway, Hist. N. Am. Birds. 



ii, 1874, 515 (in synonymy under P. scalaris). — Lawrence, Mem. Bost. Soc, 



N. H., ii, 1874, 294, part (Tres Marias; habits; crit.). 

 D[ryobates] scalaris graysoni Ridgway, Man. N. Am. Birds, 1887, 285. 

 Dryobates scalaris graysoni Nelson, North Am. Fauna, no. 14, 1899, 43 (Tres Marias; 



habits; crit.).— Bailey (H. H.), Auk, xxiii, 1906, 388 (Cleofa I., Tres 



Marias). — Oberholser, Proc. U. S. Nat. Mus., xli, 1911, 141, 148 (monogr.). 

 [Dendrocopus scalaris.] Subsp. /9. Dendrocopus graysoni Hargitt, Cat. Birds Brit. 



Mus., xviii, 1890, 250. 



DRYOBATES SCALARIS AZELUS Oberholser. 



MICHOAClN WOODPECKER. 



Similar to D. s. parvus, but wing averaging slightly longer, bill and 

 feet smaller (the former more slender) , lateral reetrices with black bars 

 narrower, on outer web confined to terminal portion; similar in col- 

 oration (including pattern of lateral reetrices) to D. s. sinaloensis, but 

 decidedly smaller, and sides of chest, etc., spotted instead of streaked. 



Adult male. — Length (skin), 156.5; wing, 92; tail, 48.5; exposed 

 culmen, 18.5; tarsus, 15.5; outer anterior toe, 11.^ 



States of Michoacan (LaSalada), Oaxaca (Oaxaca City; Tlalcolula; 

 Sola), and Guerrero (Amula), southwestern Mexico. (Probably also 

 eastward to southern Puebla.'^) 



Dryobates scalaris azelus Oberholser, Proc. U. S. Nat. Mus., xli, June 30, 1911, 

 141, 147 (La Salada, Michoacdn, s. w. Mexico; coll. U. S. Nat. Mus.). 



a Four specimens. 



b One specimen (type of the subspecies). 



c A specimen from Chietla, southern Puebla, in the collection of the Comision Geo- 

 grafica Exploradora de Mexico, which I examined in 1886, apparently agrees in size 

 and color characters with the type of this form. (See Proc. U. S. Nat. Mus., iii, 1886, 

 159, where, by a misprint, the length of wing is given as 2.80 instead of 3.80 inche8= 

 96.52 mm. The length of wing, as thus corrected, is considerably greater than in the 

 type of -D. s. azelus, as given above; but at that time the wing was measured by lapng 

 it flat against a measuring stick, by which method the wing of the type of D. s. azelus 

 measures 94 mm.) 



