652 BULLETIN 50, UNITED STATES NATIONAL MUSEUM., 



Adult male. — Pileum, hindneck, back, and scapulars deep brownish 

 mouse gray or dark drab-gray, streaked with black and sparsely 

 speckled with white, the white apical specks very minute on pileum, 

 nearly absent from greater part of back, larger on lower back and pos- 

 terior scapulars; rump dark fawn color, the feathers with conspicupus 

 roundish terminal spots of white and with two or more larger transverse- 

 spots of black; upper tail-coverts paler fawn color, broadly barred 

 with black and with a roundish or triangular white terminal spot; 

 middle rectrices grayish brown, rather broadly barred with dusky; 

 other rectrices similar, but dusky bars less distinct, crossed by an 

 interrupted" subterminal band of cinnamon-buff or deep pinkish buff, 

 this immediately preceded by a broader and continuous but rather 

 irregular band of black; outermost rectrix with an additional black, 

 and buff band on inner web, the outer web with four large buff' spots; 

 wings vermiculated with grayish brown and dusky, the smaller cov- 

 erts speckled with black and white; under parts white, the sides and 

 flanks tinged with pale fawn color; throat and chest thickly marked 

 with large spots of dusky, more or less transverse, varjdng from tri- 

 angular to transverse diamond-shaped and subrounded; breast, abdo- 

 men, and anterior portion of sides thickly marked with similar but 

 smaller and more decidedly transverse spots, the flanks with regular 

 transverse bars of dusky brown; under tail-coverts broadly barred 

 with black; axillars and under wing-coverts broadly barred with 

 dusky ; bill horn color, the mandible paler basally ; iris " dark black ; " * 

 legs and feet dusky brown; length (skin), 124; wing, 69.5; tail, 48; 

 exposed culmen, 20; tarsus, 20.5; middle toe, 14.5." 



Adult female. — Similar to the adult male, but under parts more 

 tinged with brownish buff (strongly so on flanks) and the spots and 

 bars more brownish dusky; length (skin), 124.5; wing, 68; tail, 46.5; 

 exposed culmen, 18.5;' tarsus, 20.5; middle toe, 14. "^ 



North-central Guatemala (Toyabaj, department of Quich^). 



This very strongly characterized form (as compared with the differ- 

 ent forms of S. ohsoletus) seems, as nearly as I am able to judge from 

 descriptions, to be intermediate in coloration between S. guttatus of 

 Salvador and 8. fasciatus of Nicaragua. Without specimens for com- 

 parison, however, I can do no more than describe it, and call attention 

 to the need of very careful study of these Central American rock 

 wrens, which at present seem to involve anomalies in geographic 

 range, while our knowledge of their relationship to one another is 

 extremely unsatisfactory. 



Salpinctes maculatus Ridgway, Proc. Biol. Soc. Wash., xvi, Nov. 30, 1903, 169 

 (Toyabaj, department of Quiche, Guatemala; coll. U. S. Nat. Mus. ). 



« Each rectrix has the buH ol opposite webs separated by a blackish shaft-streak. 

 * Heyde and Lux, manuscript. 

 ■^One specimen (the type). 



''One specimen (no. 150905, coll. U. S. Nat. Mus., Toyabaj, Quich6, Guatemala, 

 Mar. 13, 1892; Heyde and Lux). 



