2. VIXAGO. 21 



Viaago australis, Jard. § Selb. (nee Linn.), III. Orn. pi. 81 (bad) 



( 1836-43). 

 Treron australis, part., G. R. Gr. List Spec. B. Brit. Mus. Gallime, 



p. •'!, spec, c (lt>44) ; id. Gen. B. ii. p. 467, n. 8 (part.) (1844); 



Haiti, {nee Linn.) J.f. O. lt-54, p. 504 (Gambia, Cape Coast Castle) ; 



r 1 Layard, B. S. Afr. p. 255 (1867). 

 Treron nudirostris, Rchnb. Sun. Ac. Notrit. Colunibariae, f. 2486 (nee 



ffi 1349-40; (1851); Eartl. Syst. Orn. ll.-Afr. p. 192 (1*57); 



HartL $ M"nt. P. Z. S. 1860, p. 112 (Angola) ; Marti. J. f. O. 



1861, p. 266 (Camnia and Ogowe Kivers) ; 'i Mewjl. J. f. O. 1862, 



p. 294 (N.E. Afr.) ; P Marti. B. Z. S. I86:j, p. 106 (Kazeh, E. Air.) ; 



Sharpe Sf Bouv. Bull. Sue. Zool. France, 1867, p. 52 ^Chinchoxu) ; 



Cab. v. d. Deck. Rets. iii. p. 42 (I860) (Alombas) ; Finsch $ llartl. 



I 'or/. Ost-Afr. p. 537 (part.) (1870) (Alombas) ; Bocaije,J. Sc. Lisb. 



1870, p. 349 ; Mewjl. Orn. N.O.-Afr. i. 2, p. 831 (1871) (Mombas) ; 



G. R. Gr. Sand-list, ii. p. 224, n. 9113 (1870); Meugl. Orn. J.O.- 



Afr. i. 2, p. 82 (1871J, ii. INaclitr. p. 168 (part.) (1875) ; Boeage, J. 



Sc. Lisb. 1876, p. 255; id. J.f. 0. 1876, p. 316; Oust. Xouc. Arch. 



Mas. (2) ii. p. 114 (1879) (Ogowe) ; Marti. Abh. not. Ver. Brem. 



vii. p. 117 (1881) (N.E. Afr.) ; Bbhm, J.f. 0. 1882, p. 199 (Centr. 



Afr.), 1883, p. 199 ; Bbhm if Schal. J.f. 0. 1886, pp. 416, 420, 423 ; 



Matschie, J. f 0. 1887, p. 146 ; Schal. J. f. 0. 1867, p. 228 ; Bchnw. 



J.f. O. 1892, p. 16. 

 Pbalacrotreron calva, Bp. Consp. Av. ii. p. 6 (1854) ; id. Compt. Rend. 



xl. p. 216, n. 4 (1855) ; id. Coup d'oeil Ordre Big. p. 54, n. 4 



( 1855) ; id. Icon. Biff. pi. 3 (head) (1857 ) ; Rchnb. lauben, i. p. 107 



t. 240 6. f. 3370, t. 5542. f. 1347 {ex Jard. fy Selby), ii. p. 181, t. v. 



£ 51 (exBp.) (l8ij2);G.R. Gr.Mand-list.n.y. 224, n. 9111 (1&70); 



Smisa, Mas. Nac. Lisb. Columba?, p. 5 (1S73) (Angola; ; Mein. fy 



Rchmc. Nomencl. Mas. Mein. Orn. p. 280 (1890). 

 Pbalacrotreron nudirostris, Bp. Consp. Av. ii. p. 7 (1854) ; id. Compt. 



Bend, xxxix. p. 873 (1854), xl. p. 216, n. 5 (1855) ; id. Coup 



d'oeil Ordre Biff. pp. 4, 54, n. 5 (1855) ; id. Icon. Biff. pi. 3. f. Ii 



(1S57) ; Cass. Br. Ac. Nat. Sc. Bhilad. 1859, p. 143, n. 1«8; id. 



J. f. O. 1860, p. 196; Rchnb. 'Lauben, i. p. 107, t. 244. f. 2486 



I L862), ii. p. 181, Suppl. t. v. f. 51 (ex Bp.) (1862) ; G. R. Gr. 



Mand-list. ii. p. 2l'4, n. 9113 (1870) ; Soma, Mus. A'ac. Lisb. Co- 



luinbre, p. 5 (1873) (Bissao, Casamance, Angola) ; Oust. Bull. Soc. 



Bhilom. (7) i. p. 106 (1877). 

 Vinago p) tiriopsis, Verr. MS. ?, unde 



Pbalacrotreron pytiriopsis, Bp. Compt. Rend, xxxix. p. 873 (1854). 

 Treron nudifrous, Heugl. MS. in Mus. Stuttg. (Slave Coast) ; Boeage, 



J. Sc. Lisb. ii. p. 144 (1867) ; id. J.f. O. 1876, p. 316. 

 Treron calvus, Rchmc. J.f. O. 1874, p. 388 (Cameroons, Gaboon) ; 



Shell. B. Z. S. lf>88, p. 45 (Tomaja, Equatorial Africa). 

 Treron waketieldi, Shell, (nee Sharpe) B. Z. S. 1885, p. 229 (Kili- 

 manjaro). 

 Treron calva, variete d'Angola, Boeage, J. Sc. Lisb. si. p. 253 (1887). 



Adult male. Forehead naked, in some specimens very extensively, 

 and apparently swollen into a large knob; head, neck, and underpaits 

 olive-green, more or less yellowish ; a broad leaden-grey collar at 

 the base of the hind neck, more or less conspicuous ; rest of the 

 upper parts olive ; leathers of the llanks olive, edged with yellowish 

 white; middle of the abdomen pale yellow; tibial feathers bright 



