13. NILAUS. 1(37 



Adult. Very similar to JV. chloris, but differing from it in the 

 following points. N. vireo is much smaller in size, has the fore- 

 head, cheeks, and ear-coverts ashy grey ; a bright yellow loral aud 

 superciliary stripe and a big patch of yellow on the throat ; " bill 

 light horn-colour, culmen darker ; feet bluish grey ; iris clear 

 brown " (FaR-cnsteiu). Total length 7 inches, culmen 0-7, wiug 

 3-05, tail 3-4, tarsus 0-97. 



JIab. Congo district. 



a. Ad. sk. Chissarabo, Congo. Dr. Lucan [C.]. 



3. Nicator gnilaris. 



Laniarius, ii. sp., Grai/, Hand-l. B. i. p. .396, no. 001.5. 

 Nicator gulari.s, Finsch S; Hartk, FUff. Odafr. p. .360 (1870). 



Adult. Of the same size and of almost the same colour as N. 

 Moris ; but with the forehead olivaceous brown, the hind neck and 

 top of the head olive-green, with a slight orange tinge ; cheeks, ear- 

 coverts, and the whole throat pale ochraceous or buff ; the yellow 

 ring round the eye and also the white spot in front of the eye 

 wanting ; " bill and feet greyish horny brown " (Finsch tj" Hart!.). 

 Total length 8-5 inches, culmen 0"9, wing 4*2, tail 4-3, tarsus 1'15. 



Younr/. Without the yellow tips on the tail-feathers and quills, 

 while the tips of the wing-coverts are white instead of yellow. 



Hab. Zambesi district, Eastern Africa. 



a. Ad.sk. Tete, Zambesi {Sir J. Kirk). Livingstone Expedition. 



(Tj'pe of species.) 



b. Ad.sk. Shupanga, Zambesi (.SV/-, 7. ATr/i). Livingstone Expedition. 



13. NILAUS. 



Nilaus, Sivai/is. Zool. Jmirn. iii. p. KW (ls27) N. capensis. 



Head of Nilaus capensis. 



Culmen strongly curved downwards, ending in a strong tooth 

 and a notch. Nostrils oval, operculated, partly hidden by the few 

 bristles ; hardly any rictal bristles. Eirst primarj- long and narrow ; 

 tip of wing formed by third, fourth, and fifth primaries ; secon- 

 daries four fifths of length of whole wing. Tail square, shorter than 

 wing. Tarsus anteriorly as well as laterally covered with transverse 

 scales ; the scales on the distal two thirds of the inner side have a 



