22 REVIEW OF THE GENUS SCLERURUS — RIDGWAY. 



brownish, the rump and upper tail-coverts usually more rusty, some- 

 times bright chestnut ; under parts paler than upper, the throat some- 

 times whitish ; no superciliary stripe, and inner webs of primaries uni- 

 colored. 

 "^ancie. — Southern Mexico to Argentine Republic. 



KEY TO THE SPECIES. 



«\ Lower rump and upper tail-coverts chestnut, distinctly different from color of 

 back. 

 b 1 . Chin and throat whitish or grayish, distinctly different from color of chest. 

 c 1 . Chin and throat uniform dull white or grayish white, the feathers margined 

 or tipped with dark grayish or dusky. Hub., Brazil, south of the 



Amazon Valley S. umbretta (Licht.) (p. 22). 



c 2 . Chin and upper throat white, lower throat gray, the feathers without dis- 

 tinct (if auy) darker tips or margins. 

 d l . Chest olive-tawny or raw-umber, the belly, etc., grayish olive ; upper parts 

 olive, the lower rump and upper tail-coverts bright chestnut. Hab., 



Venezuela and Tobago S. albogularis (Swains.) (p.24). 



d-. Chest chestnut-brown or burnt-umber, the belly, etc., dull slate-color tinged 

 with dark rusty ; upper parts dark umber-brown, the lower rump and 

 upper tail-coverts dark chestnut. Hab., Costa Rica. 



S. canigularis Ridgw. (p. 24). 

 fc 2 . Chin and throat bright russet or rufous-tawny, like color of chest. Hab., South- 

 ern Mexico to Peru and Lower Amazons S. mexicanus Scl. (p. 25). 



a 2 . Lower rump and upper tail-coverts similar in color to back, or only slightly more 

 rufescent. 

 b\ Chin and throat tawny or russet, like chest. Hab., Guiana. 



S. caudaculus (Vieill.) (p. 27). 

 b". Chin and upper throat with basal portion of feathers whitish or very pale 

 browuish, their tips or terminal margins dark brown or dusky. 

 c 1 . General color umber or sepia brown. 



d l . Throat brown, with basal portion of feathers dull brownish-white or pale 



brownish. Hab., Upper Amazons S. fuscus (Max.) (p. 28). 



d 2 . Chin and upper throat white, the feathers tipped or margined with brown 

 or dusky. 

 e 1 . Chest without spots or distinct streaks of tawny, and general coloration 

 lighter brown. 

 /'. Geueral color deep chocolate-brown ; smaller (wing, 3.30-3.40 ; tail, 2.10- 



2.30). Hab., Colombia S. brunneus Scl. (p. 29). 



r 2 . General color vandyke-brown, more olivaceous on under parts, the 

 sides of head and neck and upper chest brownish-tawny : larger 

 (wing, 3.95; tail, 3.10). Hab., Eastern Brazil (Bahia). 



S. lawrencei Ridgw. (p. 29). 

 e". Chest with distinct spots or streaks of tawny, and general color much 

 darker brown. Hab., Southern Mexico to Panama. 



S. guatemalensis Hartl. (p. 30.) 

 c 2 . General color olivaceous. Hab., Western Peru S. olivascens Cab. (p. 31). 



Sclerurus umbretta (Licht.). 



Myiothera umbretta Licht., Verz. Doubl., 1823, 43, No. 471 (Bahia). 



Myioturdus umbretta Menetk., Mem. do l'Acad. St. Pelersb.,vi ser., Sci. Nat., I, 



1835, 468 (Bahia). 

 FormicarUis umbrettiis Gray, Gen. B., i, 1840, 211. 

 ScleruriiH umbretta Scl. & Salt., Norn. Neotr., 1873, 62.— Scl. & HuDS.,Arg. 



Orn., I, 1888, 174 (Misiones, Arg. Rep.). 



