10. RnYTIDOCEEOS. 387 



Buceros ruficollis, Vieill. N. Diet. cTHist. Nat. iv. p. GOO (1816) ; 



Qmy ^' Gaim. Voy. Uran. Zool. p. 678 (1824J ; Temm. PL Col 



ii. p. 68, pi. 557 (1834); Miill. S,- Schl. Ver/i. Ges. Ned. Ind. 



pp. 24, 30 (1839-44); Miill. Verh. Nat. Ges. Land- en Volk. 



pp. 2-2, 109 (1839-44) ; Gray, Gen. B. ii. p. 399 (1847) ; Sclat. J. 



Linn. Soc. ii. p. 156 (1858) ; Gray, P. Z. S. 1858, p. 194; id. Cat. 



B. New Guin. pp. 38, 69 (1859) ; id. P. Z. S. 18G0, p. 350, 1861, 



p. 436; Bernst. J.f. 0. 1861, p. 118; Schl. Mm. Pays-Bas, i. 



Buceros, p. 3 (1862) ; Bennet, P. Z. S. 1862, p. 83 ; Wall. Litell. 



Ohs. iii. p. 314 (1863) ; Parker, P. Z. S. 1863, p. 516 ; Finsch, Neu~ 



Guin. p. 161 (1865) ; 8clat. P. Z. S. 1869, p. 122; Posenb. Reist. 



naar Geelwinhh. pp. 83, 115 (1875) ; Mackay, P. L. 8. N. S. W. 



i. p. 37 (1870) ; D'Alh. Ann. Mus. Civ. Genov. x. p. 9 (1877) ; Scl. 



P. Z. S. 1878, p. 671 ; ImscJi, P. Z. S. 1879, p. 17 ; Layard, Ibis, 



1880, p. 307; Fi?isck, Ibis, 1881, p. 537. 

 Calao (Calao) ruficollis, Bonap. Consji. Gen. Av. i. p. 90 (1850) ; 



Rosenb. Nat. Tijd. Ned. Ind. x.w. p. 229 (1863) ; id. J. f. O. 



1864, p. 117. 

 Rliyt'ceros (Rhyticeros) ruficollis, Bonap. Consp. Vol. Anisod. p. 3 



(1854). 

 Buceros (Rhyticeros) ruficollis. Gray, Hand-l. B. ii. p. 129 (1870). 

 Rhytidoceros ruficollis, Salvad. Ann. Mus. Civ. Genov. vii. p. 763 



(1875), ix. p. 19 (1876), x. p. 124 (1877) ; Sharpe, J. Linn. S. xiii. 



p. 314 (1877), p. 493 (1878), xiv. p. 186 (1879). 

 Calao papuensis, Rosenb, Nat. Tijd. Ned. Ind. p. 229 (1863) ; id, 



J.f. O. 1864, p. 117. 

 Buceros flavicoUis, Ramsay, P. L. S. N. S. W. i. p. 393 (1876). 



Adult male. Head, neck, and upper chest dark chestnut, rather 

 paler on the throat * ; tail pure white, rest of plumage black, the 

 back and wings especially being glossed with dark green : bill yel- 

 lowish white, reddish at the base, and without any transverse ridges 

 (C. M, Woodford). Total length 34 inches, wing 16-7, tail 10, 

 tarsus 2-2. 



Young male. Without casque ; scarcely differs in plumage from the 

 adult. The head and neck appear to be always rufous -buff', and 

 the tail is irregularly spotted with black. The iris is reddish 

 brown. 



Adult female. Tail pure white, rest of plumage black; tho upper 

 parts except the head and neck glossed with dark green : otherwise 

 similar to the male adult. Total length 30 inches, wing 16-2, tail 

 9-3, tarsus 2-2. 



Young female. Resembles the adult. 



Hah. Solomon Islands, New Britain, New Guinea, Waigiou, Mysol, 

 Halmahera, Morty, Batchian, Coram, Amboyna, Salwatti, Ravak, 

 Guebeh, and Batanta. 

 a, S ad., head Morty Island. A. R. Wallace, Esq. 



only. [C.]. 



h-d. (S $ ad. at Gilolo. A. R. Wallace, Esq 



imm. sk. [C.]. 



* The tint of the head and neck is subject to great variation, some speci- 

 mens being dark chestnut, while otliers are rufous-buff. This difference is 

 partly due to age, the younger examples being always pale, but an old example 

 from Gilolo witii 6 plaits to the casque is as pale as the youngest. 



2c2 



