Z. CHAUNA. 



lagn. An. i. p. 499 (part.) (1817) ; Steph. Gen. Zool. xii. 1, p. 272 

 (part.) (1824) ; Cha: Regn. An. 2nd ed. i. p. 536 (part.) (1829) ; 

 Sclat. P. Z. S. ]863, p. 377 (New Grenada) ; Ernst, Rev. Cient. 

 Univ. Centr. Venez. i. p. 43 (1887) (Venezuela). 



Opistholophus chavaria, Vieill. Analyse, p. 60 (1816). 



Opistholophu.s fidelis, part., Vieill. N. D. vi. p. 206 (1816). 



Chauna fidelis, part., licmz. Elem. di Zool. iii. 8, p. 33 (1825). 



Chauna derbiana, G. E. Gr. Gen. B. iii. p. 591, n. 2, pi. 160 (1846) ; 

 Salv. ^- Sclat. Ibis, 1800, p. 402 (Peten !) ; Sclat. P. Z. S. 1863, 

 p. 377, 1864, p. 75, 1865, p. 676 ; Moore, P. Z. S. 1866, pp. 368, 

 369; Sclat. ibid. pp. 369, 370, p. 417 (Trinidad); id. P. Z. S. 

 1871, p. 102 (Santa Martha) ; Sunder. Meth. not. Av. disp. Tent. 

 p. 133 (1872) ; Sclat. 8f Salv. Nomencl. Av. Neofrop. p. 128 (1873) 

 (Colombia); Bodinus, J. f. 0. 1874, p. 94 (Zool. Gart.) ; Pckmv. 

 Orn. Centralbl. 1882, p. 39 ; id. Voi/. Zool. Gdrt. p. 7l (1882); 

 Sclat. List Vert. An. 8th ed. p. 414 (1883) ; Ed. Ibis, 1888, p. 270 

 (Venezuela) ; A. Keict. Diet, of B. pt. iii. p. 820 (1894). 



Ischyrornis derbvana, Rchnb. Av. Syst. Nat. p. xxi (1852) ; G. R. 

 Gr. Hand-list, iii. p. 71, n. 10543 (1871). 



Ischyomi.s derbyana, Bp. Compt. Reiid. xliii. p. 698, n. 286 (1856). 



Palamedea derbyana, Schleg. Be Dierent. p. 266 (1864) ; id. Mtis. 

 P.-B., Ralli, p. 72 (1805) (Bogota) ; Gieb. Thes. Oni. iii. p. 12 

 (1877). • ^ 



Chauna nigricollis, Sclat. P. Z. S. 1864, p. 75, pi. xi. (New fh-anada), 

 1865, p. 676, 1866, p. 369 ( ^derbyana). 



? Palamedea cornuta, Leot. Ois. de I'isle de Trinid. p 488 (1866) 

 (=C. derbyana, cf. P. Z. S. 1866, p. 417). 



Anatomy: .»'e Parker, P. Z. S. 186;3, pp. 511,518; id. Ann. & Mag. 

 N. II. (3) xiv. pp. 144-150 (1^64); Garrod, P. Z. S. 1875, p. 348, 

 1876, pp. L-9-200 {cut of the skull, p. 198), pis. xii., xiii., xiv., xv. ; 

 Forbes, P. Z. S. 1877, pp. 307, 309, f. 1 (cloaca); id. Ibis, 1881, 

 pp. 11, 22; Beddard, P. Z. S. 1886, pp. 178, 181; Sclater, Ibis, 

 1886, p. 150, f. 2 (nianus). 



Adult. General colour slate-black, upper parts glossy, underparts 

 paler ; upper ])art of the head dark grey ; occipital crest blackish 

 grey ; cheeks, sides of the head, and throat white, sharply defined 

 from the black, which forms a broad collar round the median part 

 of tho neck ; feathers of the lower jiart of the neck, of the under- 

 pays, and also the smaller wing-covorts, more or less with paler 

 edgings ; coverts of the car[)al edge broadly edged with white ; 

 primary-coverts slightly edged with white on the inner web; under 

 wing-coverts white ; primaries and tail-feathers slaty black : bill 

 and feet red (?). Total length about 28 inches, wing about 19, tail 9, 

 culmen lo, tarsus 4*4. 



Hab. Venezuela and Colombia. 



a- Ad. St. [Jamaica.] Zool. Soc. 



b. Ad. St. Cartagena. Venezuela. Zool. Soc. 



c. cJ ftd. sk. Cartagena (Zool. Soc). Salvin-Godman Coll. 



d. (^ ad. skeleton. Cnrtag.na. Salvin-Godman Coll. 



e. Bonee of the trunk. Zool. Soc. 



