BIRDS OF ETHIOPIA AND KENYA COLONY 373 



5. Z. V. jacksoni: The highlands of Kenya Colony west of the 

 Rift Valley (Mount Elgon, Nandi, etc.). 



These races may be identified by the following notes: The most 

 northerly form, schoanus, is generally darker above and paler, less 

 yellowish below, than any of the others. The other extreme, of 

 brightest coloration, deepest and widest yellow frontal band, and 

 widest white eye ring, is shown in MkuyueTisis. The race kaffensis is 

 somewhat lighter, more yellowish, above, and has a narrower white 

 eye ring than kikuyuensis, and is the smallest of the five forms; 

 wings, 56-58 mm ; jacksoni is similar to kikuyuensis but has a some- 

 what narrower eye ring and a narrower and slightly paler yellow 

 frontal band; garguensis is nearest to jacksoni but is darker, more 

 grayish green, above. 



Hartert has recently separated the birds of Mount Kenya as a 

 racial form, Z. v. somereni^^^ which is said to be nearest to kikuyuen- 

 sis but to have a larger bill, the forehead, throat, and abdomen 

 brighter yellow, the breast with darker greenish zone, and the white 

 eye ring still wider, especially above the eye. I have examined a 

 long series from Mount Kenya, and I cannot see any constant dif- 

 ferences between them and kikuyuensis. Therefore, I consider 

 somereni to be identical with kikuyuensis. 



With regard to the Uganda race, I consider scotti from Euwenzori 

 to be distinct from stuhlmanni. 



I have seen one specimen from Kaimosi, which, by geography, 

 might be van Someren's form yalensis. I am not at all certain as 

 to the correct disposition of this name. It may be a species or it 

 may be a group of intergrades between jacksoni and kaffensis. The 

 difficulty with the latter supposition is that on Mount Elgon a larger 

 form, with broader eye rings, elgonensis (perhaps a species?), occurs 

 and breaks the geographical continuity of the blending of jacksoni 

 through yalensis with kaffensis. I have seen no Elgon material, 

 however. 



The present specimens are in fairly fresh plumage. They have the 

 following wing dimensions : Males, 59, 60 ; female, 60 mm. 



Little seems to have been recorded of the breeding season, but 

 birds with enlarged gonads were taken on Mount Kenya late in 

 March by Lonnberg.^^ August birds collected by Bowen,^^ were not 

 in breeding condition. 



Mearns noted about 100 of these birds at Escarpment, September 

 11-12. 



" Nov. Zool., vol. 34, p. 207, 1928 : Mount Kenya. 

 "Kongl. Svenska Vet.-Akad. Handl., 1911, p. 117. 

 "Proc. Acad. Nat. Sci. Philadelphia, vol. 82, p. 70, 1931, 



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