102 Mr. J. I. S. Wbitaker on Tunisian Birds. 



might perhaps do well to adopt the trinomial system, aud call 

 them A. cristata theckla, A. c. pallida, and A. c. isabellina. 



47. Alauda cristata isabellina (Bp.). 



This pale desert form of Crested Lark is only to be found 

 in the extreme south of the Regency, so much so that I 

 myself did not meet with it in the country that I visited, and 

 my specimens were all obtained by my second party, south of 

 the Chott Djerid, viz. at Sobria, El Faoura, Bir-Zouita, and 

 Bir-Sliman. Some of my specimens are remarkably pale. 



48. Alauda arvensis. 



Common throughout the north of Tunisia, and also to be 

 found on the high plateaux, although less plentifully. I 

 have even obtained specimens in the Algerian Sahara, near 

 Biskra, which somewhat surprised me. 



49. Ammomanes cinctura (Gould) ; B. M. Cat. B. xiii. 

 p. 644. 



This little Desert-Lark seems to be confined to the extreme 

 south of the Regency, and its range is very limfted. I only 

 obtained a few specimens through my friends who went 

 south of the Chott. They found it between El Faoura and 

 Bir-Zouita. 



50. Cypselus affinis. Gray. 



Micropus affinis, Hart. B. M. Cat. B. xvi. p. 453. 



This was another interesting addition to my collection 

 this year. I observed the species only on one occasion, viz. 

 near the Djebel Sota, to the west of Gafsa, where I secured 

 three specimens, male and female. I should think it probably 

 breeds there, as I found it both on my outward and return 

 journey, in the same locality. My second party obtained a 

 specimen of this Swift further south, near Sobria. Dr. 

 Koenig mentions having found it on the Djebel Mcda, near 

 Gabes (Cab. J. f. O. 1892). 



51. CaPRIMULGUS EUROPiEUS. 



Common in the north during spring. 



52. Caprimulgus ^gyptius. (B. M, Cat. B. xvi. p. 562.) 

 I obtained a specimen of this species near Gafsa, a remark- 



