BIRDS OF NORTH AND MIDDLE AMERICA. 101 



about 6.35 mm. or more in length, the concealed basal portion of the 

 secondaries likewise j'ellow; primary coverts and alula uniform black; 

 tail black, with about the basal half yellow, except middle rectrices, 

 which are blackish throughout, edged with olive-green, as is likewise 

 the blackish portion of the outer rectrices; bill horn color; legs and 

 feet similar, but darker. 



Immature malef^ — Similar to the preceding, but the olive-green of 

 upper parts inuch duller, becoming decidedly gray on hindneck; sides 

 of head and under parts dull gray, with a slight tinge of olive-green on 

 chest and sides; under tail-coverts pale grayish, with scarcelj^ a trace of 

 yellowish tinge; yellow at base of remiges both brighter and more 

 extended. 



Immature (f) male.^ — Similar to the preceding, but back and scapu- 

 lars gray, slightly mixed with olive-green, the interscapulars distinctly 

 but narrowly streaked with dusky; sides of head and under parts, 

 including whole throat and chin, plain light gray, becoming white on 

 abdomen. 



Younger {sex not determined).— SimilsiV, but pileum dull olive, the 

 feathers with dusky centers, producing an indistinctly spotted appear- 

 ance; iianks indistinctly streaked with duskj'. 



Adult mafe.— Length (skins), 114.30-116.8i (115.57); wing, 71.12- 

 72.39 (71.63); tail, 45.72-48.51 (47.60); exposed culmen, 10.41-11.43 

 (10.92); depth of bill at base, 5.84^7.11 (6.35); tarsus, 13.97-14.73 

 (14.22); middle toe, 10.92-12.19 (11.43).' 



Highlands of Guatemala (Quezaltenango, Hacienda Chancol, etc.) 

 and Chiapas (San Cristobal). 



This very distinct species is apparently more nearly related to 

 S. pinus than to S. notatus, the size and proportions being very nearly 

 the same. The fully adult male somewhat resembles in coloration 

 that of S. Hpinescens, of Colombia, but, besides having a much longer 

 wing and tail and differently shaped bill (the last broader basally but 

 more attenuated terminally), has the color of the under parts very 

 different (yellowish olive or gray instead of bright olive-yellow), and 

 the olive-green tips to the wing-coverts and margins to tertials much 

 broader. S. spinescens likewise has no dusky on the chin or throat, 

 and no dusky streaks on the under tail-coverts. 



^Possibly the adult female, since the date is the same as that of the adult male 

 described and the plumage is somewhat worn, thus indicating that it is at least a 

 bird of the second year. (Both specimens from. Quezaltenango, Guatemala, August, 

 1862, in the Salvin-Godman collection. ) 



2 No. 143725, U. S. Nat. Mus. (no. 3375, coll. U. S. Biol. Survey) , Hacienda Chancol, 

 Guatemala, Jan. 9, 1896; Nelson and Goldman. 



' Four specimens. No adult female seen by me. 



