62 Nelson, Nerv Birds from Mexico and Guatemala. I -.^^ 



Distribution. — Highlands of central Chiapas, Mexico. 



Description 0/ type. — Top and sides of head and neck dull ashy gray ; 

 back dull rufous with exposed borders of secondaries and tertials a 

 brighter shade of same ; rump and upper tail-coverts olive brown ; chin, 

 throat, middle of breast and abdomen dull white; sides of breast, flanks 

 and under tail-coverts dull, olive-shaded buffy ; over two-thirds of outer 

 web and about one-half of inner web of outer tail-feather white ; about 

 one-third of inner web of second tail-feather white; general color of 

 undescribed parts of wings and tail light clove brown ; lores blackish. 

 Measurements: Wing 77, tail 67, culmen 15, tarsus 23. 



The females are smaller and rather duller colored. In \vinter 

 dress the rufous of the back becomes dark, dull chestnut. In the 

 large size of the beak as well as in other proportions these birds 

 are similar to altirola., but the specimens before me show no 

 intergradation in coloration between the two birds. 



An examination of a large series of Mexican and Guatemalan 

 Juncos, including specimens of phcBonotus and alticola from the 

 vicinity of the type localities, reveals the interesting fact that a 

 hitherto undescribed species inhabits the highlands of central 

 Chiapas. Sixteen specimens of this bird are now before me. 

 Its range lies adjacent to that of alticola but is wholly cut off 

 from that of phcBonotus by the low country at the Isthmus of 

 Tehuantepec. Nearly all of the adult specimens of fiilvescens at 

 hand are in worn summer plumage or just entering the fall molt. 

 The type, however, is in fairly well preserved summer plumage. 



Peucaea ruficeps fusca, new subspecies, Brown Sparrow. 



Type, No. 135909, U. S. Nat. Museum, Dept. Agric. coll., 5» from 

 Etzatlan, Jalisco, Mexico, June 18, 1892. Collected by E. W. Nelson 

 (Orig. No. 185). 



Distribution. — The southwestern part of the Mexican table-land region, 

 and bordering mountains, in the States of Michoacan and Jalisco. Its 

 range to the north merges into that of scotti, and to the east and south- 

 east into that of boucardi. 



Description. — In the present race the most obvious character lies in 

 the intensity of the browns on the entire dorsal surface and the scantiness 

 of ashy borders to the feathers, thus giving a deep, warm brown color to 

 this area. The dark rufous of the pileum shades gradually into the van- 

 dvke brown of the back.. The ashy borders of the dorsal feathers, so far 



