392 Mr. V. G. L. van Someren on Birds 



and acacia country. It was more often heard than seen. 

 It has a loud full-tone whistle, which it utters from the 

 depths of a thick bush. These Shrikes are very inquisitive 

 birds, and creep to the outer branches of a bush to obtain a 

 view of anything strange that is passing, but, if alarmed, 

 they make a dive into the midst of it and remain perfectly 

 still, or make off from the opposite side to which danger is 

 presenting. 



We found the nest of this bird in a low thick thorny 

 bush; it was made of rootlets^ interlaced with grass, and 

 lined with jfibres and A^ery fine rootlets. The eggs are 

 pale bluish green in grounJ-colour, spotted with ash and 

 greyish. 



Breeding-birds were shot in May, young in nest-plumage 

 were caught in January, and young in change-plumage in 

 July. Young in first plumage are heavily barred on the 

 under surface, which is ochraceous, and the feathers of the 

 upper side are edged and tipped with yellowish white. 



Localities. Chagwe, Lake Albert, Kibero, Toudola, and 

 Kalwanga, in Uganda; Kisumu to Kibos, in British East 

 Africa. 



Laniarius jacksoni. 



S 1-5. Sl.viii. 12; 15.x. 14; 17. vi. 12 ; 15. x. 14. 



Imm. ? c? 3. 10.ix.l2; 8. ix. 13. 



? 1-3. 31.viii.l3; 10.ix.l3; 10. iii. 14. 



Jackson's Bush-Shrike was met with in pairs in the 

 forest and in the overgrown native plantations. It is not 

 a common species. 



Birds in moult were collected in March, October, and 

 September. The length of wing varies from 76-80 in 

 males and 73-75 mm. in females. 



Two young birds in clianging plumage were collected in 

 September. They present interesting features which point 

 to their close affinity to the genus Chlorophoneus. There is 

 little sign of white on the forehead, the crown is blackish 

 grey merging into the black of the nape and the dark grey 



