18 Hon. N. C. Rothschild and Mr. A. F. R. Wollaston 
tually S. momus and S. mystacea may turn out to be the 
same species. 
44. Agrobates galactotes minor (Cab.). 
307 ^,445 ?,333(?). 
North-East African specimens of the Rufous Warbler are 
smaller and somewhat darker on the back than typical 
examples from Spain. 
The Rufous Warbler was first noticed at Shendi on 
March 10th, after which date it became a good deal more 
numerous. 
45. MONTICOLA CYANUS (L.). 
248 ?. 
Rock- Thrushes were occasionally seen on the rocky hills 
out in the desert. 
46. Saxicola (Ex\anthe (L.). 
153 ?, 356 d, 413 cT. 
The Common Wheatear was frequently seen on the river- 
bank. 
47. Saxicola isabellina Cretzschm. 
148(?), 209(?), 4(?). 
The Isabelline Wheatear was not uncommon in the desert. 
It was usually to be seen in pairs. 
48. Saxicola melanoleuca (Giild.). 
249 6, 313 6, 266 ? , 298 ? . 
The Black-throated Wheatear was a fairly common fre- 
quenter of the river-bank. It was seldom seen during 
the day, but towards evening became very active ; on 
several occasions we observed one of these birds, at least an 
hour after sunset, when it was quite dark, dart out from the 
bank and hawk for flies over the water like a Flycatcher. 
. 49. Saxicola deserti Temm. 
24 6 , 83 J, 100 d, 44 (sex?). 
The Desert- Wheatear was as often to be seen on the river- 
bank as in the desert. It was generally met with in pairs. 
