Hornbills of the Ethiopian Region. 57 



V. Tip of the bill always more or less red. 

 Lower mandible rouglier, and with no 

 oblique black band. Tail with the 

 second and third pairs of feathers, 

 counting from the outer rectrices, 

 entirely white in full adults, the basal 

 portions often having some black in 

 the less mature birds, but this black 

 never extends over one half of the 



feather 14. L. semifasciutus. 



Head and neck never black. 

 •^. Head and throat brown or grey. 

 c\ Bill red. 



c'. Tail-feathers, not all tipped with 

 white. Larger. 



c'. With no white band down the 



wings. 



c". Larger. With no buft" at the 



base of the bill. With two 



pairs of tail-feathers entirely 



white 15. L. liemprichi. 



d^. Smaller. With a narrow buff 

 base to the bill. White on 

 the tail confined to a broad 

 terminal band on some of the 



feathers 16. L. melcmoJcucus. 



d^. With a white baud down the 

 wing, formed by the centre 



quills being white 17. i. monteiri. 



d*. With a white terminal band to all 



the tail-feathers. Smaller. ... 18. L. canmrus, 

 d^. Bill not red, but sometimes washed 

 with that colour in the females. 

 Lower mandible more or less ob- 

 liquely ridged. General colouring : 

 above brown, all the wing-coverts 

 broadly edged with buff, and the 

 tail with a white terminal band, 

 e*. Male : bill black, with a buff patch 

 on the upper mar.dible and several 

 oblique buii" ridges on the lower 

 one. 

 f'. With no casque to the bill .... 10. Z. yiasutiis. 

 /"*. With a well-developed lew 



casque to the bill 20. L. epirhinus. 



