1922.] CoJlection oj Birch made in the Sudan. 699 



Lanius senator senator = Phoneus s. senator S. & P. 

 This, tlic typical foi-in, is not inicommon, on migration, in 

 Egyj)t, as is also the eastern L. s. niloticus. 



Lanius minor Ginelin. 



We have three or more specimens in the Giza Museum 

 from Khartoum, all in innnature plumage and obtained in 

 August and September by Flo^Yer and the late Capt. 

 Halhed. 



T do not think that August is early for this bird to appear 

 in the Sudan, as it passes through Egypt in large numbers 

 in that month. 



Muscicapa atricapilla semitorquata Homeyer. 



Muscicapa albicollis Temm. 



Sclater and Praed seem to have ove looked the characters 

 by which these two species may be differentiated, at a glance. 

 I have set these forth, at length, in my ' Handlist.^ 



M. albicollis never has any white on the inner web of the 

 rectrices. M. a. S(nmtor<piata has white on the first, second, 

 and often the third pair. j\f. albicollis sometimes has white 

 on the outer web of the first and second pair^ sometimes no 

 white in the tail at all. 



Both of these species are common visitors, on migration, 

 to Egypt in s[)ring. 



Hirundo daurica rufula Temminck. 



This is a very common migrant through Egypt in spring, 

 and I have obtained it in autumn. Great numbers pass 

 through the Wadi Natrun in April, and there is no reason 

 to suppose that these come from anywhere else but up from 

 the sources of the Nile. 



Cuculus canorus Linnseus. 



Cuckoos pass through Egypt in July, so it is not unreason- 

 able tu suppose that that month is not so early for them to 

 appear in the Sudan. May I be permitted to quote from the 

 old adage : "In July they l)egin to fly." I might reninrk 

 that the earliest arrivals, here in Egypt in July, are always 

 adults. 



