30 KEVIEW OF THE GENUS SCLERURUS — RIDGWAY. 



and upper tail-coverts; tail brownish black, browner at base; sides of 

 head and neck light cinnamon-brown, iudistiuctly clouded or broken by 

 dark, duller brown; chin and throat white, the feathers indistinctly 

 margined with dull brown; chest dull tawny-brown (much like color of 

 malar region and sides of neck), gradually changing into light bistre, 

 tiuged with raw-umber on other under parts. Bill dusky, with lower 

 mandible chiefly pale brownish ; legs and feet dusky brown. Length 

 (skin), 7.30; wing, 3.95; tail, 3.10 ; exposed culmen, .80; tarsus, .93; 

 middle toe, .78. 



This species, of which I have seen only the specimen described 

 above, differs from 8. umbretta in the brown instead of bright-chestnut 

 color of the rump and upper tail-coverts, absence of reddish-brown on 

 chest, and more distinctly white throat. It is also larger, though some 

 specimens referred to 8. umbretta approach it very closely in size. 



Sclerurus guatemalensis (Hartl.) 



Tinactor guatemalensis Hartl., Rev. Zool,, 1844, 370. 



Sclerurus guatemalensis Scl. & Salv., P. Z. S., 1864, 354 (Panama) ; Nona. Neotr., 



1873, 62 (Guatemala). 

 Scleurus [sic~\ caudacutus (Vieill.) Lawr., Ann. Lye. N. Y., vn, 1861, 320 (Panama; 



nee Thamnophiliis caudacutus Vieill.). 



Sp. Char. — Similar to 8. umbretta (Light.), but darker, with rump 

 and upper tail-coverts deep Vandyke or bistre brown instead of bright 

 chestnut, feathers of throat much more distinctly margined with dusky, 

 and chest much less russet, as well as (usually) streaked or flecked with 

 light tawny. 



Hab. — Guatemala to Isthmus of Panama. 



Adult male (No. 116589, Jimenez, Costa Rica, April, 1886; Anastasio 

 Alfaro). — Above uniform very deep vaudyke-brown, somewhat brighter 

 on wings and upper tail-coverts; tail brownish black. Chin and throat 

 white, the feathers broadly margined with dusky ; rest of under parts 

 bistre or sepia, brighter on chest, where feathers have a central space 

 (including shaft-streak) of light tawny. Bill blackish, basal half of 

 lower mandible whitish; feet blackish brown. Length (skin), 6.60; wing, 

 3.50; tail, 2.60; exposed culmen, .85; tarsus, .90; middle toe, .75. 



Adult female (No. 61822, Sibuhue, Talamauca, Costa Rica, May, 1873; 

 J. C. Zeledon). — Similar in plumage to the male, as described above. 

 Length (skin), 6.20; wing, 3.50; tail, 2.60; exposed culmen (bill broken); 

 tarsus, .87 ; middle toe, .75. 



Young female (Coll. Am. Mus. Nat. Hist., Panama, 1862; J. McLean- 

 nan).* — Similar to the adult, but under parts much more uniform, the 

 white of throat duller and with much less distinct squamations, the 

 chest uniform mummy-brown, with only a few flue shaft-streaks of paler. 



In additiou to- the three specimens described above, there are now be- 

 fore me a young female in transition plumage from Panama (No. 53806, 

 McLeannan) and an adult male and two young birds (one a male) from 



Lawrence collection. 



