164 VISCOUNT WALDEN ON THE BIRDS 



Pyerhocentoe, Cabanis. 



65. * Pyerhocentoe melanops. 



Centropus inelanops, Lesson, Traite d'Orn. p. 137, " Java ! " errore (1831) ; Pucheran, R. et M. Z. 



1832, p. 473; Cassin, Un. St. Exp. Exped. p. 249, pi. 22. fig. 1 (1858) ; Walden, Tr. Zool. 



Soc. viii. p. 56. 

 Centropus nigrifrons, Peale, Un. St. Expl. Exped. 1st ed. p. 137, "Mindanao" (1848) ; Hartlaub, 



Wiegmann's Archiv, 18ter Jahrgang, i. p. 107, no. 72 (1852). 

 Pifrrhocentor imirufus, Cab. Mus. Hein. iv. p. 118, "Philippines " (1862). 



HaJ). Mindanao {Peale). 



I have followed Cassin in the above identification of C. melanops with C. nigrifrons. 

 end I have little doubt, for reasons already stated (Walden, /. c), that P. imirufus is 

 the same species in immature plumage. 



BUCEROTID.^. 



BucEEOS, Linneeus. 



66. * BuCEEOS HYDEOCORAX. 



Hydrocorax, Brisson, Orn. iv. p. 566, no. 1, pi. 45, "Moluccis insidis," av.juv. 



Buceros hydrocorax, Linn. S. N. i. p. 153, no. 2 (1766), ex Brisson ; Temm. PI. Col. 283, " Philip- 

 pines," $ adult. 



Calao des Moluques, D'Aubent. PI. Enl. 283, av.juv.; Buffon, Hist. Nat. Ois. vii. pp. 140, 147. 



Le Calao a casque plat, Le VaUlant, Ois. d'Afr. v. p. 127, pi. 240, rostrum. 



Le Calao roux, Le Vaillant, Ois. Rares, i. p. 13, pi. 6, av.juv. 



Buceros planicornis, Mervem.^ fide Bp. Consp. i. p. 89. 



Buceros platyrhynchus, Pearson^ J. A. S. B. 1841, p. 652. 



Buceros obscurus, Peale, Un. St. Expl. E.xped. 1st ed., Bii-ds, p. 125, "Philippines" (1848), ? juv., 

 nee Gm. ; Hartlaub, Archiv fUr Naturgesch. 18ter Jahrgang, i. p. 105. 



Hob. Luzon. Iris in both sexes yellow {Meyer). 



It is with some difficulty that we can bring ourselves to recognize the large red-billed 

 Philippine Hornbill in Brisson's description and plate. 



The dimensions given by that author fall far short of those possessed by the adult ; and 

 a plumage is described which I have not observed, and which is not possessed by a much 

 younger individual, judging by the casque obtained by Ur. Meyer. The figure by 

 D'Aubenton {I. c.) bears a striking resemblance to that in the ' Ornithologia,' and would 

 almost seem to have been copied from Brisson's plate. The description, too, given by 



' The reference to this title, as given by Giebel (Thesaurus, p. 499), is to me unintelligible. 



= A title pubUshed, without description, in his Catalogue of the Birds of the Asiatic Society of Bengal at 

 Calcutta. Mr. Blyth (op. cit. 1843, pp. 988, 989) gave a full description of the specimen— although he erro- 

 neously identified it with B. cristatus, VieiU. Later, in his Catalogue of the Calcutta Museum, p. 43, no. 17G, 

 he correctly identified the species. 



