426 
Rev. H. E. Tristram on the 
Prince Bonaparte, as to the crest being longer, to hold good 
uniformly. I obtained one, nest, the eggs of which resemble 
pale-coloured varieties of G. cristata, but are scarcely larger 
than those of Calandrella hrachydactyla. 
84. Galerida arenicola, Tristram, Ibis, vol. i. p. 58. (The 
Sand Lark.) 
This bird may be at once distinguished from its congeners by 
its bill, which is extremely elongated, slender, and curved, its 
length being *9 inch from the gape. The total length is from 
6| to 6f inches, being the full dimensions of G . abyssinica. Its 
coloration also is similar, but paler, and the flanks and belly 
are suffused with a faint isabel hue. From its beak, and general 
conformation, it seems to be a link between the genera Galerida 
and Certhilauda. I met with it only in the extreme east of the 
Algerian and in the Tunisian Sahara. Circumscribed by these 
almost unexplored tracts, it has probably hitherto escaped the 
observation of naturalists. 
85. Galerida macrorhyncha ; Tristram, Ibis, vol. i. p. 57. 
(Long-billed Crested Lark.) 
Unlike its congeners, this bird, by far the largest of its genus, 
appears only to resort to the northern edge of the Sahara, where 
its lateral range extends from Morocco to Tripoli. As might 
be anticipated from its habitat, its plumage partakes only in a 
slight degree of the sandy hues which mark the true Desert 
habitants, although very much paler than any Crested Larks 
obtained in Europe or in the Tell. It is unnecessary to repeat 
the diagnosis already given in ‘ The Ibis/ but its size will at 
once prevent it from being mistaken for any other species. 
Its whole length is 7’8 inches, wing 4*5, tail 2*8, beak 1 *0, 
tarsi 1*05. The form of its bill resembles that of G. areni¬ 
cola , but, though curved, it is not so slender, and is stouter and 
more compressed at the base. In both species the extremity of 
the bill is rounded and dilated, instead of running to a point 
as in other Galerida. This may probably arise from its habit 
of constantly digging into the soil for its food, from which 
cause also the capistra are generally much worn and the nostrils 
bare. It is very abundant near El Aghouat, where I first re- 
