168 TTIRDIDA'. 



and S. occidentalis, there seems to be a remarkable, though 

 slight, difference between the eggs of the Western Black-eared 

 Chat and those of the preceding species, S. stapaziyia ; and this 

 coincidence appears to indicate some climatic influence causing the 

 colouring-matter to be brighter in one region than in the other, 

 for it is the Eastern race or form of each species that lays the more 

 highly-coloured eggs in both cases. It is unnecessary, perhaps, to 

 say more in describing the eggs of the Western race, than that 

 they resemble those of S. stapazina in form and size, but have a 

 duller and slightly darker ground and less conspicuous markings. 



4. Andalusia, Spain {A. Muiz: Seebohm Coll. 



Hargitt Coll.). 



4. Malaga, Spain (//. Saunders). Seebohm Coll. 



4. Malaga, 7th May. Howard Saunders, Esq. [P.]. 



o. ]\lalaga, 3rd June. Howard Saunders, Esq. [P.]. 



4. Valencia, Spain (H. S.). Seebohm Coll. 



3. Algeria, May (7/. B. Tristram). Crowley Bequest. 



Sa^icola albicans, Wahlb. 



Saxicola stricklandii, Andersson, Birds Dam.-land, p. 105 (1872). 

 Saxicola albicans, Sharpe, ed. Lai/ard's Birds S. Africa, p. 237 (1875-84) ; 



Seebohm, Cat. Birds B. M. v. p. 398 (1881) ; Nehrk. Kat. Eiersamml. 



p. 41 (1899); Stark ^ Sclater, Fauna S. Africa, Birds, ii. p. 199 



(1901) ; SharjJe, Hand-l. iv. p. 176 (1903). 



The only two eggs of the Pale Chat in the Collection are rather 

 elongate in form. Ground-colour clear pale greenish-blue, faintly 

 speckled with light brownish-lilac, principally towards the broad 

 end. They measure respectively: -82 by 59 and -81 by "60. 



2. Uvanipo-land, S. Africa {C. J. Crowley Bequest. 

 Anderssun : Tristram Coll.). 



Saxicola isabellina, Cretzschm. 



Saxicola ifabellina, Tristram, Ibis, 18C7, p. 94 ; Hevf/l. Orn. N.O.-Afr. i. 



p. .344, taf. xliii. fig. 12 (1869) ; Dresser, Birds Eur. ii. p. 199 (1874) ; 

 . Bree, Birds Bur. 2nd ed. ii. p. 110, pi. (1875) ; Seebohm, Cat. 



Birds B. M. v. p. 399 (1881) ; id. Egqs of Brit. Birds, p. 189, pi. 51. 



fig. 13 (189G); Gates, Fauna Brit.'ind., Birds, ii. p. 77 (1890); 



Rattray, Journ. Bomb. Nat. Hist. Soc. xii. p. 339 (1899) ; Sharpe, 



Hand-l. iv. p. 176 (1903). 

 Saxicola saltatrix, Tacz. J.f. O. 1873, p. 117, taf. ii. fig. 29. 



Of the three sets of eggs of the Isabelline Chat in the Collection 

 two are exactly like ordinary eggs of S. oenanthe : the third set has 

 the ground-colour of a considerably darker tint of greenish blue, 

 and the eggs are more or less faintly spotted with purple. In size 

 they vary from -SO to "90 in length, and from 'Ol to "68 in 

 breadth. 



5. Sarepta, S. Russia, 19th May. Seebohm Coll. 



4. Smyrna, 17th April (7". -BTrWjUf;-). Seebohm Coll. 



5. Mt. Hermon, Palestine, 4th June Crowley Bequest. 



{H. B. Tristram). 



