354 BUCEEOTlDiE. 



2. Buceros silvestris. 



? Le Cako d'Afrique, Briss. Orn. iv. p. 570 (1760). 



? Le Brae ou Calao d'Afrique, Dmihent. PI. Eul. viii. p. 39 ; Buff. 



Higf. Nat. Ois. vii. p. 154 (1780). 

 ? African Iloriibill, LafJi. Gen. Si/n. i. p. 348 (1781). 

 Le Calao a casque en croissant, Le.vaill. Hist. Nat. d'Ois. VAmer. i. 



p. 26, pi. 13(1801). 

 Crescent Hornbill, Shaiv, Gen. Zool. viii. p. 7 (1811). 

 ? Buceros africanus, Gm. S. N. i. p. 359 (1788) ; Lath. Ind. Orn. i. 



p. 143 (1790) ; Slmio, Gen. Zool. viii. p. 6 (1811); Vieill. N. Diet. 



d'Hist. Nat. iv. p. 591 (1816) ; Mcrrciu, Ersch u. Griiber, Encijcl. 



xiii. p. 282 (1824). 

 Hydrocorax iudicus, Ilaak, Tab. an. desc. 

 Buceros silvestris, Vieill. N. Diet. d'Hist. Nat. iv. p. 592 (1810) ; 



Less. Truite Orn. p. 256 (1831) ; Elliot, Monoejr. Bucerot. pt. v. 



[text] (1881). 

 Buceros diadematus, Dumont, Diet. Sc. Nat. vi. p. 203 (1817). 

 Buceros uiger, Merrem, Ersch u. Gruber, Enet/cl. xiii. p. 286 (1824). 

 Buceros luuatus, Temm. PI. Col. ii. p. 63, p'l. 546 (1834); Bonap. 



Consp. Gen. Av. i. p. 90 (1850); id. Consp. Vol. Anisod. p. 2 



(1854) ; Cab. Sf Heine, Mas. Hein. ii. p. 175 (1860) ; Gray, 



P. Z. S. 1860, p. 356. 

 Buceros rhinoceros, var. a. javanica, Mull. ^ Sehl. Verh. Ges. Ned. 



Ind. p. 22 (1839-44). 

 Buceros rhinoceros, var. lunatus, Schl. Mus. Pays-Bas, i. Buceros, 



p. 5 (1862). 

 Buceros (Buceros) rhinoceros, var. silvestris, Dubois, Bull. Mus. 



Behj. iii. p. 194 (1884). 

 Buceros rhinoceros, Gray, Gen. B. ii. p. 399 [part] (1847). 



Adult male resembles B. rhinoceros in general appearance, but 

 differs from it both in its larger size and in the shape of the casque, 

 which is mucli longer and only very slightly curved up at the 

 anterior end. The black subterminal band across the tail is, on 

 the whole, considerably wider (ca. 5 inches), and the black of the 

 middle portion of the shaft of each tail-feather is produced down 

 the median line of the white basal part to the root ; but neither of 

 these characters is reliable, as they are occasionally more or less 

 developed in specimens of B. rhinoceros. Bill and casque yellowish 

 white, middle of casque orange-red, a black line from the nostril 

 running up the outer edge of the casque ; posterior of casque, base, 

 and cutting-edge of both mandibles black. Total length 47 inches, 

 wing 20-7, tail 10, tarsus 3-4. 



Adult female does not differ in plumage from the male. There 

 is no black at the posterior end of the casque or mandibles, nor 

 any black line running up the outer edge of the casque from the 

 nostril. Total'iength 46 inches, wing lS-3, tail 15-1, tarsus 3-2. 



Hah. [? Sumatra {Bock ^ Raffies)] Java. 



rt. c? ad. sk. [?] Sumatra (Baffles). India Museum. 



h. cJinim.sk. [?] Sumatra (Cfl/'/i?oc/.-). Tweeddale Coll. 



c. c? ad.sk. East Java.' Wallace Coll. 



d. S fid. St. Indian Archipelago. 



e. 2 ad. sk. Bishop of Victoria 



[P.j. 



