188 Notices and Descriptions of various new [No. 159. 



bicolor, Eyton, except that it has " a white stripe extending from be- 

 hind each eye to the back of the neck, and so encircling the head." 

 B. bicolor is probably the B. malabaricus apud Raffles, and B. al- 

 birostris apud Horsfield ; and with reference to my description of 

 this species in J. A. S. xii, 996, I may mention that the casque does 

 project forward, and very prominently, in old specimens. Of the other 

 species noticed on the same occasion, I have been since informed that 

 B. cristatus, Vieillot (p. 988,) has been renamed B. buccinator by Mr. 

 Gray ; B. pucoran (p. 990, as Swainson misled me in spelling it,) 

 should have been written B. pusaran, it being rightly identified with 

 ^rlte^bird of Raffles ; B. malabaricus (p. 993,) must rank as B. pica, 

 Scopoli; and B. ginginianus (p. 996,) as B. birostris, Scopoli, the 

 ~names given by this author holding priority over those of Latham and 

 ; Gmelin. Lastly, with respect to Raffles's assertion that the females of 

 B. rhinoceros are rather smaller, and have the horn more recurved 

 than in the male, it shews that that respected observer was unacquaint- 

 ed with the perfectly matured male, which not only is larger than 

 the female, but has the tip of its casque reflected so as to point down- 

 ward, whereas in the female (so far as I have observed) it rarely, if 

 ever, even points backward : the sexes in this species being readily 

 distinguishable, like those of B. cavatus, B. pica, and other allied 

 species, by the posterior surface of the horn, above the forehead, being 

 black in the male, and concolorous with the rest in the female ; besides 

 which the male Rhinoceros Hornbill has a black line dividing the bill 

 and casque, and continued forward and upward upon the latter, paral- 

 lel with its anterior margin. It may be remarked further, of the Rhino- 

 ceros Hornbill, that this species seems to wear away the cutting edges 

 of its mandibles more than any other ; so that when the tips meet, a 

 wide hollow occurs along the medial portion of its bill. 



Genus Irrisor, Lesson. In the ' Annals and Magazine of Natural 

 History' for 1843, pp. 238 et seq., is inserted a paper read by Mr. 

 Strickland to the Zoological Section of the British Association Meet- 

 ing of that year, wherein is argued the near affinity of this well mark- 

 ed genus for the Hoopoes ( UpupaJ, in opposition to the opinion of 

 the Baron De la Fresnaye and others, who have contended that these 

 two genera are, at most, but very distantly allied : and though Mr. 

 Strickland has hazarded no decided opinion respecting the immediate 

 affinities of the combined group formed of Irrisor and Upupa, 



