216 YELLOW BELLIED, OR 



by one example, the sentinel lark of Le Yaillant, 

 or the Macronyx Capensis, Swains. ; the present is 

 consequently a new species, readily distinguished at 

 the first glance from the former, by its yellow throat 

 and broad black gorget. 



The * developement of the foot, in the Senegal 

 species, is in strict accordance with that which is 

 found at the Cape ; and we may therefore conclude 

 that the habits of both are very similar. The sen- 

 tinel lark has been so named by Le Yaillant, from 

 its note, loudly and often repeated, perfectly resem- 

 bling the challenge, qui vive qui vive! whenever 

 either man or animal passes near it. The Cape 

 species, like the present also, has the posterior claws 

 somewhat more curved than is usual in this family, 

 by which, as Le Vaillant observes, it can perch with 

 facility, although it is generally seen upon the 

 ground, frequenting the open plains and the borders 

 of rivers. 



On comparing this with the M. Capensl.^ a very 

 remarkable difference in the structure of the bill 

 may be detected ; it is of the same length in both 

 species, but in this the upper mandible is much 

 more curved towards its extremity, so as to appear 

 almost arched from its base, the tip likewise is 

 strongly and distinctly notched, instead of being 

 entire ; and the bristles at the base, which in Ca- 

 pensis are altogether obsolete, extend in this to half 

 the length of the bill, so as to give it, with its 

 general form, very much the appearance of that of 

 a bush-shrike. The claws are larger, particularly 



