358 BrCEROTID.E. 



shaped, and tint-topped, extending backwards an inch or more be- 

 hind the vertical from the eye ; the anterior end either considerably 

 elevated, and forming an obtuse angle with the middle of the 

 culraen, or sloping down anteriorly till it becomes almost confluent 

 ■with it; sides of the throat naked ; tail-feathers subequal, uniform 

 ■white stained with buff; crest moderate, rather hairy; size large. 

 Range. Philippine Islands. 



Keij to the Species. 



I. Anterior part of casque raised above the culmen. 



a. Bill and casque entirely rose-red Injdrocora.r, p. 358. 



/). Anterior half of bill whitish nmidanensis,^. 359. 



II. Anterior part of casque not raised above cul- 



men semiyaleatus, p. 3G0. 



I. Hydrocorax hydrocorax. 



Le Calao, Briss. Orn. iv. p. 566, pi. xlv. (1760). 



Le Calao des Moluques, Dauhent. PL Enl. no. 283 ; Bvff. Hist. Nat. 



Ois. vii. p. 147 (1780). 

 Philippine Hornbill, var. A, Lath. Gen. Syn. i. p. 345 [adult] (1781). 

 Indian Hornbill, Lath. Gen. Spi. i. p. 351 [immature] (1781). 

 Le Calao Roux, Levaill. Hist. Kat. d'Ois. fA?ncr. i. p. 13, 



pi. vi (1801). 

 Le Calao a Casque Plat, Levaill. Hist. Nat. Ois. d'Afr. i. p. 127, 



pi. 240(1806). 

 Buceros hvdrocorax, Linn. Syst. Nat. i. p. 153 (1766) ; Forst. Ind. 



Zool. p. 40 (1781) ; Gm. S. N. i. p. 359 (1788) ; Lath. Ind. Orn.i. 



p. 144 (1790); Shaw, Gen. Zool. viii. p. 31 (1811); Vieill. N. 



Diet. d'Hi.st. Kat. iv. p. 697 (1816) ; Temm. PL CoL ii. p. 73, 



pi. 283 (1824) ; WagL Syst. Av. Buceros, no. 7 (1827) ; Less. 



Traite Orn. p. 254 (1831); Grai/, Gen. B. ii. p. 399 (1847); 



Blyth, Cat. Birds Miis. As. Soc. p. 43 (1849); Bo7iap. Consp. 



Gen. Av. i. p. 89 (1850); ScU. Miis. Pays-Bas, i. Buceros, p. 2 



(18(52) ; V(m Mart. J. f. O. p. 18 (1866); Waldcn, Trans. Z. S. 



ix. p. 164 (1873) ; Tweed. P. Z. S. 1877, pp. 543 & 692; Steere, 



List Birds ■!>,• Mamm. Philippines, p. 13 (1890y ; Hartert, Cut. 



Mus. Senckenb. Frank/. -p. UO {1691). 

 Platyceros hydrocorax, C'ah. ^- Heine, Mus. Hein. ii. p. 174 (1860). 

 Buceros (Hydrocorax) livdrocorax, Greni, Hand-L B. pt. ii. p. 128, 



sp. 7884 (1870); Dubois, BuU. Mus. ^Bely. iii. p. 195 (1884). 

 Buceros bicornis, var., Shatv, Geti. Zool. viii. p. 17 (1811). 

 Bacerc s planicornis, Merrem, Ersch u. Gruber. Eneyel. xiii. p. 287 



(1824). 

 Hydrocorax planicornis, Bonap. Consp. VuL Anisod. p. 2 (1854) 



Elliot, Monogr. Bvcerot. pi. vii. [text] (1877). 

 Buceros platyrhynchus, Pears. J. As. Soc. Beny. p. 652 (1841). 



Adult male. Upper part of the head, checks, chin, and breast 

 black ; throat ■white, shading gradually into the chestnut of the rest 

 of the head, neck, and chest ; hack, rump, upper tail-coverts, wing- 

 coverts, and two outer secondaries dirty brown, mixed with rufous 



