14 PICARIA 
Rhytidoceros plicatus Tweeddale, The Ibis, p. 294 (1877): Elliot, Monogr. Bucerot. pl. 37 
(1882); Dubois, Syn. Avium, Vol. 1, p. ror (1899). 
Rhytidoceros plicatus var. ruficollis, Salvadori, Ann. Mus. Stor. Nat. Genova, Vol. 10, 
p- 299 (1877): 
4. Rhytidoceros narcondami Hume. Narcondam Island (Bay 
Rhyticeros narcondami Hume, Str. Feath. Vol. 1, p. 411 (1873). of Bengal). 
Rhytidoceros navcondami \:\\iot, Monogr. Bucerot. pl. 38 (1882). 
Buceros plicatus (part | Dubois, Bull. Mus. Hist. Nat. Belg. Vol. 3, p. 205 (1884). 
5. Rhytidoceros everetti Hartert. Sumba Island. 
Rhytidoceros everett? Hartert, Ornith. Monatsb. Vol. 5, p. 117(1897) ; Dubois, Syn. Avium, 
Vol. 1, p. 102 (1899). 
10. GENUS ACEROS HopGson 
Aceros Hodgson in Gray, Zool. Misc. p. 85 (1841) (type : Buceros nepalensis). 
Characters. Bill large, curved and compressed; base of the upper mandible only is 
covered by a large transversally grooved plate ; casque rudimentary. Tail wedge-shaped, basal 
half black, rest white. Feathers of the crest and neck very long and hairy. 
Geographical Distribution. South-eastern Himalayas, and the hilly districts from 
Assam to Tenasserim. 
1. Aceros nepalensis Hodgson. (Plate 2, Fig. 6.) Nepal, Sikkim, Boutan, 
Buceros nepalensis Hodgson, Asiat. Res. Vol. 18, Pt. 1, p. 178, 2 pls. (1829); Gray, Gen. Assam to Tenasserim. © 
of Birds, Vol. 2, pl. a9 (1847). 
Aceros nepalensts Hodgson, Icon. ined. in Brit. Mus. Pass. pl. 314 (1842); Elliot, Monogr. 
Bucerot, pl. 45 (1882). 
Calao (Aceros) nepalensts Bonaparte, Consp. Gen. Avium, Vol. 1, p. 90 (1850). 
Rhyticeros (Aceros) nepalensis Bonaparte, Consp. Volucr. Anisod. p. 3 (1854). 
Aceros leucostigma Salvadori, Ann. Mus. Stor. Nat. Genova (2), Vol. 5, p. 515 (1887). 
ll. GENUS ANORRHINUS REICHENBACH 
Anorrhinus Reichenbach, Syst. Avium, pl. 49 (1849) (type : Bucevos galeritus). 
Synonyms: Berenicornis Bonaparte, Consp. Gen. Avium, Vol. 1, p. 91 (1850) (type : Buceros comatus) ; 
Ptilolaemus Ogilvie-Grant, Cat. Birds Brit. Mus. Vol. 17, p. 392 (1892) (type : Buceros tickellz). 
Characters, Bill more or less large, somewhat curved and compressed; casque 
extending about over half the culmen, highest at its anterior end, whence it inclines gradually 
backward to the base of bill. Skin around eyes, cheeks and throat naked, or with the throat 
more or less feathered. Head covered by a long loose bushy crest. Wings long. Tail long, broad 
and usually rounded, 
Geographical Distribution. Asalu, Cachar, Tenasserim, Malacca, Sumatra, Borneo. 
KEY TO THE SPECIES 
t. Uatl browiish onep with the lashithiuid Clack’. <=). 0 2) ee GALE Rue 
2. Tail long, white, the middle pair of feathers considerably the longest . 
a. Tail brownish black, tipped with white. 
L. Stats of the head, chil and tino viufous-Ouf. =) 5) ey les en ea) un) ee ee DLGK Ian. 
. . A. COMATUS. 
S.S7desioj the head cAuiand thvoaienivite’ 5) re ysl) i ve ice ne ACS ee 
