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TOCKUS SEMIFASCIATUS 





ALLIED HOBNBILL, 



Buceros semifasciatus, Hartl. Journ. fur Omith. (1855) p. 356; id. Ornith. West-Afr. (1857) p. 163; Schleg Mus 

 Pays-B. (1862) p. 13; G. R. Gray, Hand-1. Birds (1870) pt. ii. p. 130. sp. 7902; Giebel, Thesaur. Ornithi 

 (1872) p. 503 ; Reichen. Journ. fiir Ornith. (1876) p. 43. 



Tockus semifasciatus, Sharpe, Ibis (1869) p. 192. sp. 41; id. Cat. Afr. Birds (1871) p. 9. sp. 70; Reich. Journ. fiir 

 Ornith. (1875) p. 13. 



Hab. Senegambia to the Gaboon (Schlegel) ; Fantee (Ussher) . 



Although closely resembling the T. fasciatus, the present bird may always be distinguished 

 from it by having the two lateral rectrices next the outermost ones black on their basal half, 

 instead of being white for their entire length. The geographical distribution of the two species 

 is very similar. Of the habits and economy of the present one I have not found any thing recorded. 



Bill. — maxilla for half its length from the point, tip of mandible, and a line along the com- 

 missure, running downwards towards the base, black ; rest of bill bright yellow ; the maxilla is 

 much swollen at base, and rises into a low crest with a deep lateral groove on each side, descending 

 rapidly towards the tip. Head, neck, back, wings, and flanks black, with a greenish gloss on back 

 and wings. Tail black, with a greenish gloss, the two lateral rectrices next to the outermost one 

 white for nearly the apical half of their length. 



Total length 18-J inches, wing 9J, tail 10 ; bill 3J-, height at base 1J. 



Specimen figured is in the collection of the Paris Museum. 



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