THE BIRDS OF ALGERIA. 53 



230. Tristram's Crested Lark Galerila cristata 

 ?)iacror/uj)ic/ta, Tnstnim, is a resident on the northern 

 borders of the Sahara. Taczanowski met with this 

 race between El Kantara and El Outaia. It is the 

 large-billed race of G. cristata, measuring in length 

 of bill from '9 to I'o inch. 



231. The Curve-billed Lark. Certhilauda deser- 

 torum (Stanley), is a resident in the deserts, where it 

 is said to be universally if sparingly distributed. 



232. Dupont's Lark Certhilauda duljonti [Wq'xWox), 

 is a resident but very rare, and was only met with by 

 Canon Tristram in the ravines of the Wed N'ca, in 

 the Beni M'zab (lat. 2,3°)- 



233. Salvin's Lark Certhilauda duponti salvini^ 

 Tristram, " a smaller and more slender " bird than 

 the preceding, is a resident in the southern and 

 south-eastern deserts. 



234. The Skylark Alauda arvensis, Linnaeus, is 

 a resident in Algeria, principally confined to the 

 region of the Tell. Its numbers are increased by 

 migrants from Europe in winter. I only met with 

 this species in the meadows and barley-fields round 

 Batna. 



235. The Wood Lark yllauda arborea, Linnaus, 

 is a rare resident in Algeria, confined principally to 

 the mountain woodlands. I met with this species 



