-V^ W so UTII A MERICAN BIRDS- OBERHOLSER. 6 1 



The type of SiipKiIJaxis spixi came from Brazil, and it is on the 

 strength of comparison with birds from that country that the present 

 separation is made. A specimen from Paraguay' seems to be some- 

 what intermediate, though agreeing substantially with Brazilian birds. 



XENICOPSIS PERCNOPTERUS, new species. 



Chiirs. xp. — Allied to Xenlcopsis oleaginevH^ but more rufescent 

 throughout: upper surface somewhat darker, superciliary more deeply 

 ochraceous: breast moi'e strongly tinged with ochraceous; iinino- of 

 wing darkei-. 



Description. --\^\\)<^, adult male. No. 177706, U.S.N.M. ; Alto da 

 Serra, Brazil, August 8, 181M>; J. Lima. Upper parts uniform i-eddish 

 olive brown, a little paler on the rump and upper tail-coyerts, the 

 feathers with slightly darker margins, producing- an obsolete squamate 

 effect: wings like the back but more rufescent; tail plain chestnut; 

 superciliary stripe deep ochraceous; lores ochraceous, mi.xed with 

 oliv(> brown; cheeks, sides of head and neck oliye brown, inclining to 

 blackish, with ])road shaft streaks of buffy and white; <'hin and upper 

 throat pale buff', the feathers all t'pped with oliye; remainder of lower 

 surface oliye brown, rather lighter than that of the upper parts, 

 sti-eaked broadly and sharply with ])uffy white and ochraceous. these 

 markings narrow on flanks, sides, and crissum; lining of wing deep 

 fulvou.-; inner margins of remiges dull ochraceous. Length of wing, 

 7U nun.; tail. 73 nun.;' exposed culmen, 18 mm.; tarsus, 22 mm.; 

 middle toe, 18.5 mm. 



In the charactiM- of the sti-eaking below this new species agrees with 

 both XruH-i^pxlx ()],'ii(jli,rnx and Xenlcopi^ls acrltn.s^'' differing further 

 from the latter in its decidedly more rufescent color both aboye and 

 below, and in the strongly buffy instead of yellowish shade of the 

 light areas on the breast and lower throat. There is no difficulty in 

 distinguishing the present species from XenlcopHla Tafosuperclllatus^ 

 since the much more distinctly streaked, less rufescent lower surface, 

 the paler superciliary stripe, with the much darker, more oliye upper 

 p irts, serye to separate it almost at a glance. There seems to be little 

 if any difference in size between any of the ffye closely allied species, 

 A'lilropsls r)if<mip><'rclJlatn><, X. oleagliicHs. X. cabaiilsl, X. acrltus, 

 :ui(l A". pt^i'cnopto'Xis. 



Family TVRANNID.K. 



OCHTHOECA RUFIMARGINATA ACROPHILA, new subspecies. 



diars. ,s-^/%>.— Similar to Ochfhoeni rKjiiixdylnata I'ariiiKiiylnata, 

 luit entire upper surface rufescent instead of sooty brow^i. 



f >i'-scrlptlon.— Tyi)Q^ adult male. No. 32915, U.S.N.M.; Rio NajK), 



'Tail not fully grown. 



'^ Oberhulscr, Pm,'. P>i,,|. Soc Wasliington, XIV, 1901, j., 1S7. 



