524 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



and feet brown; length (skins), 109.22-118.11 (118.28); wing, 63.50- 

 66.04 (64.52); tail. 42.16-46.28 (44.45); exposed oulmen, 8.89-10.16 

 (9.40); depth of bill at base, 7.11-8.64 (7.87): tarsus, 15.21-16.26 

 (16.00); middle toe, 12.19-13.72 (12.9.5). ' 



Ada! t fondle. — ^Similar to the adult male, but duller in coloration; 

 brown above, with pileum more broadly streaked with dusky on a 

 ground color of olive instead of yellowish, dusky streaks on back 

 broader, and yellow of under parts much less bright; length (skins), 

 110.49-111.25 (110.74); wing, 59.69-64.26 (61.72); tail, 40.64-43.18 

 (41.66); exposed culmen. 9.14-9.65 (9.40); depth of bill at base (one 

 specimen), 7.87; tarsus, 15.75-16.00 (15.87); middle toe, 12.70-13.21 

 (12.95).'^ 



Yo}in(/ in t ra)is!th)n j)li(yna(/e. — Pileum dull lirown. broadlv streaked 

 with blackish; back and scapulars similar, but more fulvous and more 

 broadly streaked; rump yellowish olive-green; upper tail-coverts 

 brownish gray, darker centrally, and with still darker shaft-streaks: 

 lesser wing-coverts fulvous-olive; middle and greater coverts dusk}' 

 centrally, the former tipped with fulvous-olive, the latter tipped and 

 broadly edged with fulvous-buff or dull ochraceous; remiges dusky, 

 the tertials broadh* margined with light brown, the secondaries and 

 primaries narrowly edged with a much paler tint; tail .duskv with 

 light grayish brown edgings; an indistinct superciliary stripe of dull 

 yellow, becoming brighter yellow over lores; cheeks and. auriculars 

 plain olive-brownish; under parts oil yellow tinged with brownish 

 across chest and along sides, and fading to primrose yellow on abdo- 

 men and under tail-coverts; flanks narrowlj- and indistinctly streaked 

 with dusky; wing, 63.50; tail, 43.18; exposed culmen, 9.14; tarsus, 

 15.24; middle toe, 13.46.'^ (Across the chest are many dull whitish 

 feathers marked with a mesial streak of dusky brown; but these 

 feathers are remains of the streaked nestling plumage.) 



Southeastern Mexico, m States of Vera Cruz (Orizaba) and Chiapas 

 (Palenque), to Guatemala (Dueiias). 



This species is exceedingly similar to S. arvensis minor (Cabanis), of 

 Guiana, but is rather paler in coloration, an adult male of S. a. minoi\ 

 from Annai, British Guiana,* having the blackish streaks on the back 

 darker, the olive-green of the rump darker, and the vellow of the under 

 parts deeper (lemon yellow on breast and abdomen), the chest, sides, 

 and Hanks strongly shaded with olive-greenish, and the Hanks indis- 

 tinctly streaked with dusky. The measurements are practicallv iden- 

 tical. In the coloration of the under parts the adult male of ^S". chrymps. 

 agrees closely with an adult male of !S. arvensis luteirentris (Meyen) 



' Seven specimens. 



^ Three specimens. 



^ Specimen in Salvin-Godman collection, from Dueiias, Guatemala, September, 1862. 



*No. 146049, U. S. Nat. Mus.; A. Boucard. 



