BIRDS OF NORTH AND MIDDLE AMERICA. 169 
SCLERURUS GUATEMALENSIS (Hartlaub). 
GUATEMALAN SCLERURUS. 
Adults (seaes alike)—Above plain deep vandyke brown, the 
feathers of pileum very indistinctly margined with dusky; tail darker 
brown, passing into blackish brown terminally; chin and throat 
white, the feathers broadly margined with dusky (at least on lower 
throat), producing a squamate effect; rest of under parts bister or 
sepia brown, brighter, more tawny, brown on chest, where the 
feathers are paler centrally and have a narrow shaft-streak of light 
tawny; under wing-coverts pale brownish gray or grayish brown, 
narrowly margined with dusky; bill black or blackish brown, the 
basal portion dull whitish or yellowish Gn dried skins); iris brown; 
legs and feet dusky horn color to brownish black (in dried skins). 
Young.—Essentially like adults but chin and throat darker, 
streaked rather than squamated with dusky and with ground color 
pale brown or brownish gray instead of white, and color of chest 
less tawny (nearly mummy brown). 
Adult male.—Length (skins), 150-181 (164); wing, 85.5-92 (88.7); 
tail, 57-66.5 (60.9); culmen, 21-25 (22.7); tarsus, 20.5-23 (22); 
middle toe, 17-19.5 (18.2).% 
Adult female.—Length (skins), 148-165 (157); wing, 83-91 (86.9); 
tail, 54.5-59.5 (57.6); culmen, 21.5-23.5 (22.4); tarsus, 21-23 (21.9); 
middle toe, 1819.5 (18.3).° 
+ Kighteen specimens. b Ten specimens. 
Locality. Wing. | Tail. se Tarsus. mae 
MALES. 
One adult male from Tabasco, Mexico................--2--+--- 87 57 21.5 22 18.5 
Three adult males from Honduras............-2...2-..0e2200++ 89.7 61.5 23 21.8 18.7 
Two adult males from British Honduras........... nar aNA heres 90.5 61.2 22 21.7 18.2 
One adult male from Nicaragua.......-...-.----.------220- ee 90 61 22 20.5 18 
Ten adult males from Costa Rica........--.2-22-22-2-e2e eee eee 88.5 57.5 23 21.5 18 
One adult male from Panamf............2.22- eee eee eee eee 85 57.5 23 21.5 18 
FEMALES, 
One adult female from Guatemala...............2..02..ee ee eee 86.5 58 22 21 18 
One adult female from Honduras..........---222--+--+eeee eee 89.5 58.5 22.5 21.5 18.5 
One adult female from British Honduras............-.-.-.---- 91 59 23 22.5 19 
Five adult females from Costa Rica.................2..022-002+ 86.9 57.1 22.7 22 18.5 
Two adult females from Panamé.........---.-----22-eeeeeee ee 84 57.5 21,7 22 18.2 
