IT). LAUrs. 



18!) 



Chroicoceplialiis personatus, Jlruch, J.f. 0. 185.3, p. 104; id. op. cit. 



1855, p. 289; Licht. Aometicl. Av. p. 1)8 (1854: Peru). 

 Gavia serrana, />/;. liev. Zool. 1855, p. 10. 

 Gavia pursoaata, Bp. C. li. xlii. p. 771 (185G) ; Bias. J.f. O. 18U5, 



p. 372. 

 Lanis glaucotes (ncc Mei/en), Cass. U.S. E.rpl. Exp., Orn. p. 381 



(1858: Chile). 

 Lania personatus, ScJtleg. Mus. P.-Bas, Lari, p. 35 (1863). 

 Laius boDapartii, Scl. >^ Salv. P. Z. i>. 1868, p. 178 (Tambo, Peru). 



AduU male in hreedinrj-plumage. Head and nape black, slightly 

 sooty on the forehead and jet-bhiek at the junction with the white 

 neck and throat ; a small white semicircle behind the eye ; mantle 

 ])ale pearl-grey ; wing-coverts, inner secondaries, and the two upper 

 primaries darker grey ; edge of wing white ; outer quills chiefly 

 black on the upper part, with white shafts; the 1st with a black 

 tip, a large while subterminal mirror, and the black touching the 

 shaft on both webs ; the 2ud with a similar tip and mirror, but the 

 black slightly separated from the shaft on the outer web ; the 3rd 

 with a smaller mirror but more white on the outer web (see cut) ; 



the 4th and 5lli with white along the shaft on both webs ; the Gth, 

 7th, and Sth with a gradual diminution of black, till that colour 

 becomes a mere fringe on a grey ground in the Sth ; the extreme 

 tips of all except the two outermost greyish white in mature birds, 

 but black up to the "Tith or Otli in the mnjority ; tail and under 



