dacelonida:.—bucerotid^e. 
391 
Uralcyon sylvia leucura (Neumann). 
Tanysiptera nigriceps leucura Neumann, Ornitli. Monatsb. 1915, 
p. 180 : Hook Island. 
Distr .—Rook Island. 
Sub-Genus EDQUISTA Math. 
JEdquista Mathews, Birds Austr. vol. vii. p. 198, 1918. Type (by 
original designation) : Tanysiptera carolince Schl. 
Edquista carolinse (Schl.). (17-312.) 
Tanysiptera carolince Schlegel, Ned. Tijdschr. Dierk. vol. iv. p. 13, 
1871: Mafor Island. (Fig. Gould, N. G. iv. pi. 47.) 
Distr .—Island of Mafor, in Geelvink Bay, New Guinea. 
Family BUCEROTIDiE. 
Genus RHYTICEROS Reichenb. 
J RJiyticeros Reichenbach, Av. Syst. Nat. pi. 1., 1852 (1853). Type 
(by monotypy) : Buceros undulatus Shaw. 
Calao Bonaparte, ConBp. Gen. Av. vol. i. p. 90, 1850. Type, Buceros plicatus= 
B. undulatus Shaw. 
Rhyticeros everetti Rothsch. 
Bhytidoceros everetti Rothschild, Journ. f. Ornith. 1897, p. 513: 
Sumba. 
Distr .—Sumba. 
Rhyticeros plicatus (Forster). 
Distr . — Ceram, Waigou, New Britain, New Ireland, New 
Guinea, Moluccas, and Solomon Islands. 
Rhyticeros plicatus plicatus (Forster). (17-386.) 
Buceros plicatus Forster, Indische Zoologie, p. 40, 1781: Ceram. 
( Fig. Ell. Bucerot. pi. 37; and Nov. Zool. xxi. pi. 5.) 
Buceros obscums Gmolin, Syst. Nat. p. 362, 1788 : “ India,” error = Ceram. 
Calao papuensis Rosenberg, Nat. Tijd. Ned. Ind. vol. xxv. p. 229, 1863. 
Distr. —Ceram. 
Rhyticeros plicatus ruficollis (V.). 
Buceros ruficollis Vieillot, Nouv. Diet. d’Hist. Nat. vol. iv. p. 600, 
1816: Waigou Island. (Fig. PI. Col. pi. 557.) 
jjistr . — Northern Moluccas, Western Papuan Islands, New 
Guinea, and Bismarck Archipelago. 
