386 BUCEEOTlDj;. 



a. 5 ad. sk. 3Iempakul River, opposite Gov. Usslier [C.]. 



Labuau (Gov. Ussher). 



h'-e'. S Sad. sk. Lawas R., N.W. Borneo. Gov. Usslier [C.]. 



f. 2 ad. sk. No locality. Bishop of Victoria 



Ad. skeleton. 



[PJ. 



3. Rhytidoceros narcondami. 



Rliyticeros narcondami, Hume, Str. F. i. p. 411 (1873), ii. pp. 110, 



176 (1874). 

 Rliytidoceros narcondami, Elliot, Mon. Bucerot. pi. 38 [text] (1880). 

 Buceros (Rliytidoceros) plicatus, Dubois, Bull. Mus. Belcj. iii. p. 205 



[part.] (1884). 



Adult male. Head and ueck bright chestnut, shading into buff- 

 white on the throat ; rest of the jjlumage ■with the exception of the 

 tail, ychich is pure white (stained grey), black, the upper parts 

 glossed with dark green : naked skin round eye pale blue ; gular 

 skin bluish white ; iris pale red ; legs and feet brown, soles grey : 

 bill and casque horny yellowish brown, the postei'ior plait and base 

 of both mandibles red, the latter without any transverse ridges. 

 Total length 22 inches, wing 12, tail 7'6, tarsus 1"6. 



Adult female. Entirely black except the tail, which is pure white 

 (stained grey) ; wings, back, and rump glossed with dark green. 

 Otherwise similar to the male. 



Hah. Narcondam Island, Bay of Bengal. 



a, I. (S 2 ad.sk. Narcondam Island, Bay of Ben- Hume Coll. 



gal, 23rd March, 1873. (Types of the species.) 



4. Rliytidoceros plicatus. 



Wreathed Horubill, Lath. Gen. Si/n. i. p. 358 (1781) ; id. Suppl. i. 



p. 70 (1787). 

 Buceros plicatus, Forst. [ex Bainpier, p.' 231) Ind. Zool. p. 40 



(1781) ; Lat/i. Ind. Orn. i. p. 146 (1790) ; Shaw, Gen. Zool. viii. 



p. 38 (1811)5 Vieill. N. Diet. d'Hist. Nat. iv. p. 593 (1816); 



Dumont, Diet. Sc. Nat. vi. p. 210 (1817) ; Merrem, Ersch u. 



Grtiber, Enci/cl. xiii. p. 287 (1824) ; TJ'affl. Si/st. Av. Buceros, 



u. 8 [part.] (1827) ; Less. Tmite Orn. p. 255 (1831) ; Graj/, Gen. 



B. ii. p. 399 [part.] (1847); Tweeddale, Ibis, 1877, p. 295. 

 Rhyticeros (Rhyticeros) plicatus, BonajJ. Consj). Vol. Anisod. p. 3 



(1854). ' 



Rh}i;idoceros plicatus, Tweeddale, Ibis, 1877, p. 294; Salvad. Ann. 



Mus. Civ. Genov. x. p. 299 (1877) ; Ramsay, P. L. S. N. S. TF.iii. 



p. 263 (1878), iv. p. 97 (1879) ; Elliot, Mon. Bucerot. pi. 37 [text] 



(1878) ; DAlb. ^- Salv. Ann. Mus. Civ. Genov. xiv. p. 47 (1879) ; 



Salvad. Orn. Papuasia, i. p. 392 (1880) ; Blasius, P. Z. 8. 1882, 



p. 702 ; Guillemard, P. Z. S. 1885, p. 566 ; Grant, P. Z. S. 1887, 



p. 330, 1888, p. 192 ; Tristram, Ibis, 1889, p. 557. 

 Rliytidoceros plicatus, var. ruficollis, Salvad. Ann. Mus. Civ. Genov. 



X. p. 299 (1877). 

 Buceros (Rhytidoceros) plicatus, Dubois, Bull. Mus. Belg. iii. p. 205 



[part.] (1885). 

 Buceros obscurus, Gm. S. N. i. p. 362 (1788). 



