ACER08. 149 



February and in March ; the nest-hole is usually on very high trees 

 and at a great height from the ground, the number of eggs one to 

 three and the size about 2-29 by 1*61. 



1056. Rhytidoceros narcondami. The Narcondam Hornbill. 



Rhyticeros narcondami, Hume, S. F. i, p. 411 (1873) ; ii, pp. 108, 



176; id. Cat. no. 146 quat. 

 Rhytidoceros narcoudami, Elliot, Mon. Buc. pi. 38 ; Ogilvie Grant, 



Cat. B. M. xvii, p. 386. 



Coloration. Male. Head and neck rufous ; throat a little paler ; 

 tail white : remainder of plumage black glossed with dark green. 



Female. Black throughout except the tail-feathers, which are 

 white. 



In both sexes the bill and casque are pale horny yellow, 

 brownish red towards the base ; furrows on the casque blackish 

 brown ; irides pale red ; orbital skiu pale smalt-blue ; gular skin 

 white, tinged with greenish blue ; legs and feet brown. 



Length about 26 ; tail 7 ; wing 12 ; tarsus 2'1 ; bill from gape 

 4'8. The female a little smaller. 



Distribution. The island of Narcondam, east of North Andaman, 

 Bay of Bengal. Only a single pair are known ; these were obtained 

 by Mr. Hume when he visited Narcondam in 1873. 



Genus ACEROS, Hodgson, 1844. 



No true casque, but the basal portion of the upper mandible is 

 thickened and crossed at the sides by dark oblique grooves not 

 extending across the culmen, wanting in the young and increasing 

 in number with age ; cheeks, chin, and throat naked ; tail long 

 and graduated. Feathers of head and neck loose-textured, both 

 shafts and webs hair-like. Commissure of the bill greatly broken 

 away in adults. Coloration of sexes different. 



A single species. 



1057. Aceros nepalensis. The Rufous-necked Hornbill. 



Buceros nepalensis, Hodgs. As. Res. xviii, pt. 1, p. 178, 2 pis. 



(1829) ; id. Gl. Set. i, p. 249 ; Blyth,J. A. S. B. xi, p. 970; xii, 



p. 989 ; xvi, p. 997, pi. xliv, tig. 1 ; id. Cat. p. 45 ; Tickell, Ibis, 



1864, 5. 182. 

 Aceros nipalensis, Hodgs. in Gray's Zool. Misc. p. 85 (1844) ; Horsf. 



&f M. Cat. ii, p. 601 ; Jerdon, B. I. i, p. 250 ; Godw.-Aust. J.A.S. B. 



xxxix, pt. 2, p. 95 ; Blyth, Birds Burnt, p. 69 ; Gammie, S. F. iii, 



p. 209 ; Elliot, Mon. Buc. pi. 45 ; Hume 8f Dav. S. F. vi, p. 110 ; 



Hume, Cat. no. 146 ; Oates, B. B. ii, p. 98 ; id. in Hume's N.^JE. 



2nd ed. iii, p. 77 ; Beddard, P. Z. S. 1889, p. 588 ; Salvadori, Ann. 



Mus. Civ. Gen. (2) v, p. 572 ; vii, p. 382 ; Ogilvie Grant, Cat. B. M. 



xvii, p. 380. 

 Aceros leucostiema, Salvadori. Ann. Mus. Civ. Gen. (2) v, pp. 516, 



573 (1887). 



