524 NOTES ON COSTA RICAN BIRDS CHERRIE. 



more decirtedly brownish ; flanks transversely mottled or indistinctly 

 barred with dusky and jiale brownish ; thighs plain, light brown on 

 lower portion, upper part barred with dusky. Upper mandible black, 

 edged with paler; lower mandible light bluish gray or plumbeous ; iris 

 brown; feet dusky; length (sfein), G.IO; wing, 2.85; tail, 2.65; exposed 

 culmen, 0.70; tarsus, 0.98." 



No. 42808 (U. S. National Museum Collection, San Mateo, Costa 

 Eica, April, 1866, J. Cooper), has the under surface dull rufous-brown 

 shaded with dusky ash centrally and the bands are of a more rufous 

 shade. Also the uj^per surface is somewhat duller rufous, the head 

 difl'ering very little from the back. The lower mandible is plumbeous. 



Oreothlypis gutturalis. 



Young (No. 2116, Collection Museo Nacional de Costa Eica, Yolcan 

 de Poas, July 27, 1888, A. Alfaro) : Evidently a bird not long from the 

 nest. Above a trifle paler gray than in the adult female, but with the 

 black patch on the back just as well marked. Below, the throat and 

 breast are bulfy with a brownish shade (almost the clay-color of Eidg- 

 way's "Nomenclature of colors.") Eest of lower parts ashy grayish, 

 paler, almost whitish, in the center of the belly. 



Dendroica vieilloti. 



A series of four birds from the Pacific side of Costa Eica (Punta 

 Arenas) and eleven from the Atlantic side (Porto Limou) belonging to 

 the D. vieilloti group, compared with examples of true D. vieilloti and 

 specimens (including the types) of D. hryanti and D. hryanti castanei- 

 ceps have convinced me that the two latter are only subspecifically dis- 

 tinct from vieilloti. In both instances the Costa Eican birds seem to 

 furnish the connecting link, although in most characters in both instan- 

 ces they seem to be nearer the northern forms hryanti and casfaneiceps 

 than to true meillotij to which last form they approach closest in the 

 rich yellow edgings to the wings. 



In the type of D. hryanti the lower parts with the exception of chin 

 and throat are bright gamboge-yellow (not so bright as in true vieilloti), 

 with a few narrow mostl}' concealed streaks of chestnut-rufous. In 

 other specimens from the same locality the chestnut streaking is de- 

 cided, but streaks narrow, and not merging into the rufous-chestnut of 

 the throat, which has a sharply defined margin. In Costa Eican examples 

 (from the Atlantic side) the chestnut stripes are much broader (but not 

 so broad as in vieilloti) and the margin of the chestnut throat is not well 

 defined, having a tendency to spread itself into the chestnut streaking 

 of the breast, as in vieilloti. The shade of rufous-chestnut on the head 

 and throat varies the same degree in the different specimens. There 

 are ten adult males (X>. vtei/^o^j hryanti) from the Atlantic side; none 



