386 ZOOLOGY. 



passes into the grey one by imperceptible degrees, is the 

 type of A. bifasciata, Licht. I do not intend to enter 

 at length into the question of the identity or distinctness 

 of these two races, but merely to show that if they are 

 to be distinguished, the name desertorum must be re- 

 tained for the greyer form, found on the shores of the 

 Eed Sea and in Arabia, and bifasciata for the more 

 rufous race which is found in Nubia. Latham's Desert 

 Lark (" Gen. Hist." vol. vi. p. 301), as was pointed out to 

 me by Dr. Finsch, seems to apply to the bifasciata type, 

 as the head, neck, and back are said to be dun or brownish 

 buff colour, and the specimen, although stated to be in 

 the collection of Mr. Salt, can scarcely have been the same 

 . as the type described by Lord Stanley. The synonymy 

 will be : — ■ 



Certhilauda (Alauda) deseetorum, Stanley, loc. cit. — Heugl. 



No. 183.— Faun. d. Eothen Meer.— Peterman's Mitth. 1861. 



— Ibi3, 1859, p. 343.— Joum. f. Orn. 1865, p. 230. 

 C. bifasciata, Gould, B. Europe, pi. 168. 



(This is a somewhat intermediate variety.) 



C. Salvini, Tristram, Ibis, 1859, p. 57. 



Certhilauda {Alauda) btfasciata, Licht. Verz. d. Doubl. p. 27.^ 



— Riipp. Atlas, t. v.- Temm. PI. Col. 393. 

 0. desertorum, Stanley, apud Latham, Gen. Hist. vi. p. 301. — Eiipp. 



Syst. Uebers. p. 78, No. 304.— Heugl. Syst. Uebers. No. 438.— 



? Jerdon, Birds of India, ii. p. 438. 

 ? Saxicola 1 pallida, Blyth, Joum. As. Soc. Bengal, xvi. p. 130. 



(This also appears somewhat intermediate, and 

 Jerdon notices that an Indian specimen is 

 darker than that figured by EiippeU.) 



My specimens, all from the same locality, show great 

 Variation in the amount of spotting on the breast, though 



