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.) Grallaria guatimalensis princeps (p. 149). 



hh. Paler; underpartsochraceous, 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 lajger (average measm-ements: wing 116.5, tail 48.3, 

 culmen 27.3, tarsus 51.8, middle toe 26.5). (Southwestern Mexico.) 



Grallaria guatimalensis ochraceiventris (p. 151). 



GRALLARIA GUATIMALENSIS GUATIMALENSIS Prevost and Des Murs. 



GUATEMALAN ANTPITTA. 



Adults (sexes alikeV).^' — Pileiim 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; "wdngs 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 wliitish, 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 tlu-oat 

 olive-brown, suffused, more or less strongly, with tawny-oclu-aceous, 

 sometimes mixed somev/hat 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 bro\vnish (in 

 dried skins). 



« ^Tiile 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 casea 

 been correctly determined. 



