NO. 1847. THE LADDER-BACKED WOODPECKERS— OBERROLSER. 157 

 DRYOBATES SCALARIS CENTROPHILUS, new subspecies. 



Chars, suhsp. — Similar to Dryobates scalaris symplectus, but bill 

 shorter; lower surface darker, laterally always streaked with black; 

 also sides of head and neck more deeply smoky; upper parts much 

 darker, the wliite bars decidedly narrower, the black ones broader; 

 wliite bars on wing-quills much narrower, the white spots much 

 smaller, and with less white on pileum ; outer webs of primary coverts 

 with much smaller spots of wliite. 



Description.— Ty^e, adult male. No. 155991, U.S.N.M., Biological 

 Survey collection; Ameca, JaUsco, Mexico, March 3, 1897; E. W. 

 Nelson and E. A. Goldman. Crown and nape black, the feathers of 

 the former subterminally white, terminally scarlet vermilion, this 

 producing a mottled effect on the top of the head, but merging into 

 a solid band of red on, the occiput and anterior hind neck; rest of 

 upper body surface black, all, except the superior tail-coverts, barred 

 with white — these white bars decidedly narrower than the black 

 interspaces; tail black, the three exterior pairs of feathers, including 

 the dwarfed outermost one, barred throughout with white except on 

 basal portion of inner web of third pair; the fourth pair barred on 

 most of outer vane and on terminal portion of inner vane with white; 

 wings black, much spotted with wliite, this forming, on tertials and 

 longer wing-coverts, fairly well-defined bars; sides of head and neck 

 pale browTiish, with a postocular and a malar stripe of black, which 

 meet on the side of the neck; nasal tufts and entire under parts rather 

 light smoky brown, the lower abdomen and crissum whitish; the sides 

 of breast and body with streaks of black; the flanks and crissum with 

 bars of the same; lining of wing white, with spots of black. 



Measurements. — Male:^ Wing, 100-105 (average, 102.4) mm.; 

 tail, 56-63.5 (57.7); exposed culmen, 19.5-23 (20.9); tarsus, 16.5-17.5 

 (17.1); middle toe, 11.5-13 (12.3). 



Female :2 Wing, 97-103.5 (99.6); tail, 54-62.5 (56.9); exposed 

 culmen, 16.5-18 (17.5); tarsus, 16-17 (16.4); middle toe. 10.5-12 

 (11.4). 



Type-locality. — Ameca, Jalisco, Mexico. 



Geographical distribution. — Central western Mexico: north to Du- 

 rango, southern Durango; east to San Juan Capistrano, central west- 

 ern Zacatecas; Bolanos, northern Jalisco; Ocotlan, central eastern 

 Jalisco; and Patamban, northwestern Michoacan; south to Uruapam, 

 northwestern Michoacan; and Sierra Nevada de Colima, southern 

 Jalisco; west to near Mascota, western Jalisco; and Arroyo de Javilan, 

 southern Tepic. 



' Six specimens, from the Mexican States of Jalisco, Zacatecas, and southern Durango. 

 2 Seven specimens, from the Mexican States of Jalisco and Michoacan. 



