398 BUCEROTIDJE. 



15. LOPHOCEROS. 



Type. 

 Loplioceros, Hempr. Sf Ehr. Si/mb. Phijs. Av. 



fol. 2, footnote 8 (1828) L. nasutus. 



Alopliius, I£e)»j)>: ^- Ehr. t. c. fol. aa, footuote 1 



(1828) L. erytlirorliyuclius. 



Tockiis, Less. Traite Oni. p. 2-52 (1831) L. eiythrorhynchus. 



Rhynchoceros, Gloger, Hand- u. Hilfsb. p. 335 



(1812) L. melanoleucus. 



Grammicus, Reich. Syst. Ac. pi. xlix. (1849) . , L. nasutus. 



Size small or very small. Bill moderate, curved, with or without 

 a small keel-shaped casque ; sides of throat more or less naked ; 

 tail subquadrate ; moderate crest of soft feathers ; plumage above 

 variously coloured, below white *. 



Eange. Africa. 



Key to the Species. 



I. No white or pale grey line running from the 



nape down the middle of the back. 



A. Wing-coverts neither spotted nor margined 



with white. 



a. Breast and belly white. 



a'. Bill orange-red ; four outer pairs of tail- 

 feathers with white tips melnnoleuciis, p. 399. 



b'. Basal part of lower mandible yellowish 

 white ; third and foiu-th pairs of tail- 

 feathers black with white ends semifasciatns, p. 401. 



c'. Basal part of lower mandible dark 

 reddish black ; third and fourth pairs 

 of tail-feathers white fasciafus, p. 402. 



b. Breast blackish grey; belly mixed ^-itli 



white hartlaubi, p. 403. 



B. Wing-coverts spotted or margined with 



white. 



c. Wing-coverts spotted with white. 



d'. Middle pair of tail-feathers -nith black 



shafts vionteiri, p. 403. 



e'. Middle pair of tail-feathers with yellow 



shafts camurus, p. 404. 



d. Wing-coverts margined with white. 



/'. Middle pair of tail-feathers with black 



shafts hcmprichi, p. 405. 



g'. Middle pair of tail-feathers with whitish 



shafts pallidirostris, p. 406. 



II. A white or pale buff line from the nape down 



the centre of the back. 



e. Middle pair of tail-feathers with white 



shafts. 



K. Casque not developed nasutus, p. 406. 



i. A small but well-developed casque .... epirhinus, p. 408. 



* L. hartlaubi, one of the smallest of all Hornbills, is a someivhat aberrant 

 species, having the tail wedge-shaped and the colour of the plumage below 

 dark grey. 



