2G. TACHTTRIORCniS. 1 f;3 



rump, and upper tail-coverts pure white, the uppermost feathers of 

 tlie former slightly tinged with ferruginous ; tail silvery grey, the 

 centre feathers white, crossed with eight or nine slaty bars, tipped 

 with white or ashy white, before which is a broad subterminal band 

 of black ; sides of face and throat deep slaty grey ; rest of under 

 surface white, including the under wing- and tail-coverts, the axil- 

 lanes numerously barred with slaty black, sometimes tinged with 

 rufous, the flanks barred in the same manner, but less distinctly 

 and more narrowly ; upper wing-coverts slaty black, darker than 

 the back, with indications of blackish bars on the greater coverts ; 

 quills black, inclining to ashy grey near the base, with blackish 

 cross bars, inner web whitish ashy at base, the cross bars broader 

 and more distinct. Total length 21 inches, ciilmen 1-5, wing 17, 

 tail 7, tarsus 3-4. 



Female {tjouncj). Total length 22 inches, wing 18-5, tail 5-5, 

 tarsus 3-7. 



Hub. Eastern and Central Brazil, Guiana, and Columbia, ranging 

 into Central America as far as Southern Mexico. 

 a, h. ^ ad. st. South America. 



c. $j_un. St. South America. Zoological Society. 



(1. ? juv. St. South America. Major-Gen. Hardwicke [P.]. 



e. <? JUV. St. Cai-acas. Mr. Dyson [C.]. 



/. 3 ad. sk. Concordia, New Granada. T. K. Salmon, Esq. [CI. 

 <J. ? JUV. sk. Demerara. R. B. Sharpe, Esq. [P.]. 



2, Tachytriorchis abbreviatus. 



Buteo albonotatus, Gray, Cat. Accipitr. 1844, p. 17 (desa: mtlki) : 

 td. Gen. B. i. p. 12 (1849) ; Strickl. Orn. 8ij7i. p. 31 (1855); Scl.iif 

 Salt,. m.s, 1859, p. 217 ; Gray, Hand-l. B. i. p. 8 (1869). 



Buteo abbre\ iatus, Cab. in Schomb. Beis. Guian. iii. p. 739 (1848) • 

 Scl. :^- Salv. Nomencl. Av. JVeotr. p. 118 (1873). ' 



Tachytriorchis albonotatus, Kaim, Contr. Orn. 1850, p. 75; Bv 

 Comj). i. p. 17 (1850). ' ^ ' ^' 



Buteo zonocercus, Scl. P. Z. S. 1858, p. 130 ; id. Tr. Z. S ly vt 263 

 pi. 59 (1858); Scl. 4'- Salt: Ibis, 1859, p. 217; Cones, Br. Phil 

 Acad. 1866, p. 46 ; Leot. Ois. Trinid. p. 9 (1866) ; Blliot, B N 

 Am. u. pi. xxxiii. (1869) ; Gray, Hand-l. B. i. p. 8 (1869) ; Coaper 

 B. Calif, ed. Baird, p. 479 (1870); Coues, Key N. Am. B. p. 217 

 (18/2). 



Buteo cabauisii, S<.'hl. Mm. P.-B. Buteones, p. 11 (1802). 



Astur cabanisii, Gray, Hand-l. B. i. p. 30 (1869). 



Adiat. Entirely black, the nape varied with white bases to the 

 feathers ; lores white ; quills black, secondaries a little browner ; 

 tail black, sHghtly tipped with ashy white, and banded across the 

 middle with ashy grey, white on the inner web, with remains of a 

 second narrower grey band below the broad median one; cere 

 yellow; bill black, whitish at base; feet yellow; iris reddish 

 brown. Total length 22 inches, ciilmeu 1-55, wing 16-25, tail 8-5 

 tarsus 2*9. ' 



Nearly adult (type of B. albonotatus). Black, the lores conspi- 

 cuously white, nearly all the feathers with concealed white spots, a 



n 2 



