"^^iSin"''] PROClilEDINGS OF TlIK NATIONAL MUSEUM. 521 



No. 'Jl!> (October 20, 1883, 9 ), I take to be a binl of the year. The 

 cbestmit above is softer than in other exanii>les; the winj^-coverts, 

 greater, iiiicblh^ and lesser series all bein^ blackish, e(lfi:e(l (or better, 

 perha^Ks, mottled), especially on the onter web, with pale or rnfous chest- 

 iHit, paJer than the back; i)riinary coverts ed^ed with the same color; 

 primaries and secondaries blackish brown, secondaries the darker; first 

 two primaries edg^ed (not notched) with whitish, third ed^ed and 

 sli<;htly notched, the remaining? l)rimaries and the secondaries barre<l 

 with rufous-chestnut, the bars extending across the inner secondaries. 

 The throat is ashy white, scarcely immaculate. No. 9liL ( S January, 

 1887) has some of the middle and lesser coverts barred with white; also 

 the i)rimary coverts notched and edged with fulvous-whitish ; greater 

 coverts like in the preceding example. Primaries and secondaries 

 barred, commencing with whitish on the outer primaries and growing 

 darker until on the inner secondaries it is rufous-chestnut. In this spec- 

 imen the scai)ulars are barred with black, the bars, however, almost 

 entirely concealed. The bars are well defined, much better so than the 

 bars on the ujtper tail-coverts. These bars are to be seen more or less 

 clearly defined on all of the s])ecimens before me. Ko. 922 ( 9 Janu- 

 ary, 1887), has all the wing-coverts barred with whitish; the ])rimary 

 coverts are brownish dusky, faintly edged and notched on outer webs 

 with rufous and whitish, the white predominating. In all the speci- 

 mens before me I would call the under surface of the quills dusky edged 

 on inner webs with bufify ash, not, as Mr. Sharpe says, '< (Quills dusky 

 brown below, asli brown along the edge of the inner web." 



Thryothorus liyperythrus. 



In a single specimen in the author's collection from the Pacific side 

 of Costa Rica, the orange-rufous of the under parts is slightly paler 

 than in an example from Santa Fe, Veragua, and slightly darker than 

 one from Colovevora, Veragua. In each of these examples there is just 

 a i)erceptible lightening in color in the center of the belly. Arranging 

 the three specimens spoken of above with three others, one from Pan- 

 ama and two from Tobago,* there is an unbroken series, the center of 

 tiie belly growing li.^htur until the last, Xos. 74892 and 82728, U. IS. 

 National Museum, where the center of the belly is white. In this ex- 

 ample neither is the light rufous-brown of the head so light, nor docs 

 it extend so far back as in northern specimens. 



Thryothorus melanogaster 



Male (No. 90S, Museo Xacional de Costa Kica, Pozo Azul, Pirris, 

 Decembers, 1885; Jose C. Zeledon): 



According to Mr. Siiarpe T. /(laciativentris does not occur in Costa 

 Kica, its place there being taken by T. inclano(/astcr{Ciit. of Birds, Brit. 

 Mus., Vol. VI, pp. 230, 231), an opinion in which I now fully concur. 



■•These Tobago specimens are not T. hyperythrus, hut T. rutiliis Vioill — R. R. 



