THE BIRDS OF ALGERIA. 53 



230. TRISTRAM'S CRESTED LARK Galerita cristata 

 macrorhyncha, Tristram, 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 1*0 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 dup&nti (Vieillot),, 

 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. 33). 



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 Alauda arkorea, Linnaeus, 

 is a rare resident in Algeria, confined principally to 

 the mountain woodlands. I met with this species 



