NO. 1847. THE LADDER-BACKED WOODPECKERS— 0BERH0L8ER. 149 



black bars on outer long tail-feathers wider; black bars on upper 

 parts broader. 



Measurements. — Male:^ Wing, 95-99 (average, 97.7) mm.; tail, 

 51-57 (54.5); exposed culmen, 20.5-23 (22.1); tarsus, 16.5-18 

 (17.4); middle toe, 12.5-13.5 (12.9). 



Female:- Wing, 92-98 (95); tail, 49-56 (53.6); exposed culmen, 

 18.5-20 (19.3); tarsus, 16.5-17.5 (17); middle toe, 11.5-12.5 (12). 



Type-locality. — Tres Marias Islands, Tepic, Mexico. 



Geographical distribution. — Tres Marias' Islands, Tepic, Mexico. 



The present race differs from Dryohates scalaris lucasanus in smaller 

 size; in having the outer webs of primary coverts usually without 

 white spots, never with large ones; postocidar stripe rather broader; 

 malar stripe obsolete, or nearly so, at base of bill ; and sides of breast 

 less hea\aly spotted. 



The original citation of this subspecies is sometimes given as 

 "Lawrence, Mem. Bost. Soc. Nat. Hist., vol. 2, 1874, p. 294;" but 

 here only a nomeri nudum is found. 



Of tliis race we have handled altogether 14 specimens, all from the 

 Tres Marias Islands, Tepic, Mexico, and most of them from Maria 

 Madre Island. 



DRYOBATES SCALARIS SINALOENSIS Ridgway. 

 Dryohates scalaris sinaloensis Ridgway, Man. North Amer. Birds, 1887, p. 285. 



Chars, subsp. — Similar to Dryohates scalaris graysoni, but smaller; 

 lower surface much darker, the sides of the breast always streaked, 

 instead of spotted, and more conspicuously thus marked, with black; 

 black bars on upper parts and on tail narrower; postocular stripe 

 rather narrower; outer webs of primary coverts with somewhat 

 more white. 



Measurements. — Male:^ Wing, 94-95 (average, 94.5) mm.; tail, 

 43.5-53 (48.4); exposed culmen, 19-21.5 (20.3); tarsus, 16.5-17 

 (16.8); middle toe, 12-13 (12.6). 



Female:^ Wmg, 93-96 (94.6); tail, 53.5-55.5 (54.5); exposed cul- 

 men, 17.5-19 (18.2); tarsus, 16-17 (16.3): middle toe, 11-12.5(11.8). 



Type-locality. — Near Mazatlan, Sinaloa, Mexico. 



Geographical distribution. — Southern and central Sinaloa, Mexico: 

 north to Culiacan, central Sinaloa; west to Mazatlan; south to 

 Plomosas; east to Juan Lisiarraga Mountain, southeastern Sinaloa. 



Specimens exammed, 11, from the subjoined localities in western 

 Mexico : 



Sinaloa. — Mazatlan; near Mazatlan; Culiacan; Plomosas; Juan 

 Lisiarraga Mountain. 



1 Nine specimens, from the Tres Marias Islands, Tepic, Mexico. 



2 Four specimens, from the same islands. 



' Four specimens, from the State of Sinaloa, Mexico. 

 * Five specimens, from the same State. 



