Expedition to the White Nile. 247 



prefer thick wood, of which there was but little. The only 

 note we heard it utter was a single piping sound. 



Adult. Iris brown ; bill blackish brown, lower mandible 

 yellowish at base ; legs and feet dark olive-green. 



13. Passer luteus (Licht.). 



This species was common and well distributed. Generally 

 to be found in small flocks of twenty or so, it was very 

 wild and frequented the bushes and trees in the more open 

 country. When flying it has a twittering linnet-like note, 

 while in the trees it chirps like a House-Sparrow. We 

 saw an enormous flock of these birds in some tall bushes 

 on the river-bank near Kawa. They were exceedingly 

 restless, rising in clouds from tlie bushes as we approached 

 and settling again further on, only to rise when we neared 

 them. 



Adult. Iris bright hazel ; bill horn-colour, becoming dark 

 at tip ; legs and feet pale brown. 



14. Serinus leucopygius (Sundev.). 



We only met with this species twice : at Shebesha, about 

 90 miles south of Khartum, and in some acacias near the 

 river at Wad Mariun, within 12 miles of Khartum. 



Adult. Iris hazel ; bill horn-colour ; legs and feet flesh- 

 colour. 



15. Pyromelana franciscana (Isert). 



This species was only observed within a few miles of 

 Khartum, where we found a considerable flock amongst 

 some beans and onions near the river. 



My specimens are in brown female plumage. We saw no 

 red-and-black males. 



16. ^DEMOSYNE CANTANS (Gm.). 



My birds are moulting from the immature to the mature 

 plumage, and show the following changes : — 



Old Plumage. New Plumage. 



Back mid secondaries faintly Back and secondaries more 



barred with brown. strongly barred with brownish grey. 



Croivn -feathers light - tipped Crotcn - feathers dark brown 



brown, with dark centres. with darker centres. 



