, 
166 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
SCLERURUS CANIGULARIS Ridgway. 
GRAY-THROATED SCLERURUS. 
Adults (sexes alike) —Pileum deep to dark sepia (sometimes lighter 
and browner on forehead), the feathers sometimesindistinctly margined 
with dusky; back, scapulars, and wing-coverts plain deep warm-sepia 
or vandyke brown, passing into chestnut on rump and upper tail- 
coverts, the wing-coverts inclining to chestnut or margined with that 
color; tail dark seal brown basally, passing into brownish black ter- 
minally; remiges dark sepia brown, the primary coverts more dusky; 
chin and throat light mouse gray, deeper on lower throat, paler 
(sometimes inclining to dull white) on chin; chest (broadly) dark 
dull cinnamon-rufous or tawny-chestnut; rest of under parts dark 
grayish brown or brownish slate color, tinged or suffused with tawny- 
chestnut, the under tail-coverts inclining to chestnut, with concealed 
portion dusky; maxilla brownish black, passing into horn color ter- 
minally; mandible dull pale yellowish or whitish (in dried skins), 
dusky along tomia; legs and feet dusky horn color (in dried skins). 
Young.—Similar to adults but general color of upper parts more 
castaneous (less strongly contrasted with chestnut of rump and upper 
tail-coverts) and color of chest duller (between mummy brown and 
vandyke). 
Adult male—Length (skins), 151-168 (158); wing, 86-93 (89.2); 
tail, 58.5-62.5 (60.4); culmen, 21.5-22.5 (22.4); tarsus, 22-22.5 (22.2); 
middle toe, 18-19.5 (18.6).2 
Adult female—Length (skins), 140-166 (155); wing, 85-89 (86.8); 
tail, 57-60.5 (58.6); culmen, 21.5-24 (22.2); tarsus, 21-22.5 (21.8); 
middle toe, 17.5-19 (18.6).¢ 
Costa Rica (Turrialba; Cariblanco de Sarapiqui; Tendério; Buena 
Vista; Cerro Santa Maria) and western Panamé (Boquete). 
Sclerurus canigularis Ripaway, Proc. U. 8. Nat. Mus., xi, sig. 34, Sept. 20, 1889, 
542 (Turrialba, Costa Rica; coll. U. 8. Nat. Mus.); xii, 1890, 24 (monogr.); 
Xvi, 1893, 613 (Buena Vista, Costa Rica; crit.) —ZELepén, Anal. Mus. Nac. 
Costa Rica, i, 1887, 114.—ScrarEer, Ibis, 1889, 354 (crit.)—Sanvin and 
Gopman, Biol. Centr.-Am., Aves, ii, 1891, 166—Banes, Proc. New Engl. 
Zool. Club, iii, 1902, 45 (Boquete, Panamé4, 5,600-5,800 ft.)—CarrikER, 
Ann. Carnegie Mus., vi, 1910, 645 (Costa Rica; crit.). 
[Sclerurus] canigularis SHARPE, Hand-list, iii, 1901, 72. 
Sclerurus albigularis (not S. albogularis Swainson) SctaTer, Cat. Birds Brit. Mus., 
xv, 1890, 114, part (in synonymy). 
SCLERURUS MEXICANUS MEXICANUS Sclater. 
MEXICAN SCLERURUS. 
Adults (sexes alike)—Above plain deep warm-sepia brown (some- 
times approaching prouts or vandyke brown), duller and rather 
@ Six specimens. 
