148 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
cc, Slightly darker, with black squamations of upper parts heavier; averaging 
slightly smaller, except bill and middle toe (wing averaging 111.7, tail 41, 
culmen 27.2, tarsus 48.2, middle toe 25.3). (Costa Rica and western 
Panama.) 2 oeses aeitsvee dann Grallaria guatimalensis princeps (p. 149). 
‘6b. Paler; under parts ochraceous, deepening into brownish tawny on chest; smaller, 
except tail and bill (averaging: wing 109.5, tarsus 40.4, middle toe 20.8). 
(Southeastern Mexico.)..........- Grallaria guatimalensis mexicana (p. 150). 
aa. Coloration paler, the general color of under parts dull buff to clay color; black 
squamations of upper parts much narrower; gray of hindneck, etc., much duller, 
much more restricted, the whole forehead (sometimes crown also) light olive- 
brownish; size averaging larger (average measurements: wing 116.5, tail 48.3, 
culmen 27.3, tarsus 51.8, middle toe 26.5). (Southwestern Mexico.) 
Grallaria guatimalensis ochraceiventiis (p. 151). 
GRALLARIA GUATIMALENSIS GUATIMALENSIS Prévost and Des Murs. 
GUATEMALAN ANTPITTA. 
Adults (sexes alike ?).*—Pileum and hindneck slate color or slate- 
gray, the feathers margined with black, producing a squamate effect; 
back, scapulars, and rump olive, the feathers rather broadly mar- 
gined with black; upper tail-coverts and tail russet-brown to chest- 
nut; wings olive or olive-brown, the remiges more russet brown, 
lighter on primaries, the outer of which have their outer webs much 
paler (nearly wood brown) terminally; greater coverts edged with 
russet, sometimes (also occasionally the middle coverts) with more 
or less distinct terminal spots of tawny; lores dull whitish, some- 
times slightly intermixed with dusky or grayish; a narrow line of 
white on posterior half (more or less) of upper eyelid; the posterior 
portion of lower eyelid also whitish; suborbital and auricular regions 
dark olive with narrow but distinct shaft-streaks of whitish or pale 
tawny; malar region whitish, buffy or tawny; chin and upper throat 
olive-brown, suffused, more or less strongly, with tawny-ochraceous, 
sometimes mixed somewhat with dusky, the feathers with pale 
ochraceous or buffy shaft-streaks; lower throat tawny or tawny- 
ochraceous to ochraceous-white, usually immaculate but sometimes 
more or less broken by dusky spots or bars, usually bounded poste- 
riorly by a more or less distinct narrow semicircular line of dusky 
or sooty blackish spots; rest of under parts plain bright tawny or 
tawny-ochraceous, slightly paler on abdomen, deeper on sides and 
flanks; under wing-coverts immaculate tawny-ochraceous, the inner 
webs of remiges broadly edged with a paler tint of same or ochraceous- 
buff; maxilla dusky horn color, paler toward culmen; mandible 
pale brownish (in dried skins); legs and feet horn brownish (in 
dried skins). 
@ While considerable variations in color-pattern are observable among specimens 
of all the forms of this species, in none of them do I find any differences that can 
be corellated with difference of sex—provided, of course, the latter has in all cases 
been correctly determined. 
