310 Mr. A. L. Butler on the 



distribution, are connected by every intermediate phase, 

 my Assouan bird should stand as G. c. maculata Brehm, 

 and the Khartoum specimens as G. c. fiava. 



At Khartoum, the typical habitat of G. c. flava Brehm, 

 the bird is most often found on black alluvial soil, or 

 among the green surroundings of irrigated crops, and a 

 darker coloured plumage would harmonize better with its 

 environment. The breeding-season appears to be from 

 December to March. 



19. Ammomanes aren [color (Sundev.). 



a. £ . 25 miles W. of Qmdurman, Jan. 1, 1901. 



"• + • )) j> ?? )> >> 



These pretty little Larks are not rare in the desert 

 west and south of Omdurman, and I have also seen them 

 from Omdurman to the Shabluka Cataract. They are 

 generally in pairs or in parties of five or six. I never saw 

 them on the undulating loose red-sand country of Western 

 Kordofau; they generally keep to hard or gravelly desert. 



20. Ammomanes deserti (Licht.). 



a. <$? Feb. 25, 1901, Assouan (Egypt). 



b. <$ . Dec. 31, 1902, 25 miles W. of Omdurman. 

 Lichtenstehr's Desert-Lark is a fairly common bird 



on the low rocky kopjes or "jebels" which are scattered 

 over the deserts of the Northern and North- Western 

 Soudan. It is usually met with in pairs, but sometimes 

 in small parties, which continually utter a plaintive " tweet " 

 as they flit about the rocks. 



The differences between the Assouan and Soudan birds, 

 pointed out by Messrs. Rothschild and Wollaston ('Ibis/ 

 1902, p. 7), are shown in my two skins. 



21. Pyrrhulauda frontalis Bp. 



a. <$ . Hashaba, Kordofan, May 9, 1904. 



I found the White-fronted Finch-Lark common in the 

 deserts west of the White Nile, as far south as Duem, 

 and between that place and El Obeid ; also on the Blue 



