AFES. 327 



the " Symbolse Physicse " for Buceros erythrorhynchus, 

 and Lophoceros for £. nasutus and £. Hemprichii, have 

 priority over Lesson's genus Tockus proposed for B. 

 erythrorhynchus and its allies in 1831 (Less. "Traits 

 d'Omithologie," p. 252). 



68. T. flavirostris (Eiipp.). 



Buceros flavirogtris, Eiipp. Neu. Wirb. p. 6, t. ii. f. 2. — Perr. et 



Gal. No. 42. 

 Yellow-billed HornbiU, Latham, Gen. Hist. Birds, ii. 331. 

 Tockus flavirostris, Riipp. Syst. Uebers. No. 224. 



Iris pale yellow, pupil small, bill orange yellow, gape 

 dusky, legs dusky. The note is a harsh cluck several 

 times repeated, especially when the bird is disturbed. 



In January and February this HornbiU was abundant 

 in the pass leading to the highlands from about 2,500 

 to 5,000 feet above the sea. It was usually in small 

 flocks. In May and June all had migrated to higher 

 ground, and were met with, often singly, about Senafe 

 at 7,000 and 8,000 feet. 



Like its allies, T. flavirostris is partly insectivorous. 

 In the stomach I found beetles, ants, and seeds. It often 

 feeds on the ground. All the Abyssinian Tocci, like the 

 Barbets, appear much more insectivorous than their Indian 

 representatives. The bill varies greatly in size in the 

 two sexes, as it also does in the next two species. The 

 measurements are : — 



Win<» Tail Bill from Bill from Height ofhill 



wing. laii. nosiailtotip. gape. across nostril. 



in. in. in. in, in. 



Male .... 8 9 2-9 3-3 1-35 



Female ... 13 S'T 2-2 28 1-15 



