BIRDS OF NORTH AND MIDDLE AMERICA. 



63 



whitish (sometimes intermixed with grayish), the median interscapu- 

 lars extensively wliite basally, forming a conspicuous patch when 

 feathers are parted; rump buffy grayish, the upper tail-coverts 

 darker, indistinctly margined with wliitish; tail black, the rectrices 

 tipped \vith wliite and edged for middle portion with same; wings 

 black, the middle and greater coverts broadly tipped (mostly on 

 outer webs) with wliite, the remiges edged (except on basal portion 

 of distal secondaries and proximal primaries) with wliite ; under parts 

 plain buffy white, deepening into buff on chest and ta%vny-buff on 

 malar region, the sides and flanks tinged with pale buily grayish and, 

 sometimes, very indistinctly streaked mth darker; bill, etc., as in 

 adult male; length (skins), 87-95 (90.5); wing, 48-52 (49.8); tail, 

 25.5-27 (25.7); tarsus, 14-15.5 (14.8); middle toe, 10.« 



Young female. — Similar to the adult female but without any con- 

 cealed white on interscapular region and under parts more deeply 

 colored (buff deepening into tawny on chest and sides of head and 



neck) . 



Panama (Veragua; Panama; Lion Hill; San Pablo), through 

 Colombia (Turbo; Remedios, Antioquia; Bogota), VenezAiela (Mun- 

 duapo; Nicare; La Pricion, Pio Caura; Rio Mato; Suapure), to 

 British Guiana (Demerara; Camacusa; Takutu R.; Carimang R.) 

 and western Ecuador (Esmeraldas; Chimbo; Gualaquiza; Gualea; 

 Foreste del Rio Peripa; San Nicolas; San Javier; Pambilar; Intac),^ 

 Cayenne, and eastern Brazil. 



[Sittd\ surmamensis Gmelin, Syst. Nat., i, pt. i, 1788, 444 (Surinam; based on 

 Surinam Nuthatch Latham, Gen. Hist., iv, 72, pi. 62). 



Myrmoiherula surinamensis Sclater, Proc. Zool. Soc. Lond., 1858, 234, pi. 141, 

 fig. 1 (monogr.) ; Cat. Am. Birds, 1862, 179 (Cayenne ; Esmeraldas, w. Ecuador) ; 

 Cat. Birds Brit. Mus., xv, 1890, 231, part.— Cassin, Proc. Ac. Nat. Sci. Phila., 

 18G0, 190 (Turbo, Colombia).— Lawrence, Ann. Lye. N. Y., vii, 1862, 293 

 (Lion Hill, Panama). — Sclater and Salvin, Proc. Zool. Soc. Lond., 1864, 

 356 (Lion Hill); 1879, 525 (Remedios, Antioquia, Colombia; habits; descr. 

 nest and eggs). — Salvin, Ibis, 1874, 311 (Tiu-bo, Colombia; Panama); 1885, 

 425 (Camacusa, British Guiana). — Berlepsch and Taczanowski, Proc. 

 Zool. Soc. Lond., 1883, 564 (Chimbo, \v. Ecuador; crit.). — Salvin and God- 



b I have seen specimens from Panamd, Colombia, and BritLsh Guiana only. 



