Vol. xliii.] 130 



occurrence o£ a distinct race on Mount Elgon. A series of 

 six males and two females from the terra typica have been 

 examined, together with some specimens from the other 

 parts of its range. In these birds the males have a wing- 

 measurement ranging between 87-92 mm., and the females 

 (S6-87 mm. as against 82—85 mm. in three females from 

 Kilimanjaro. 



The oldest name for the members of this group is un- 

 doubtedly Gray's Poliospiza biirtoni, given to birds from 

 the Cameroon Mountain in 18G2 (Ann. & Mag. Nat. Hist, 

 ser. 3, vol. x. p. 443). Therefore, the specific name must 

 stand as P. buHoni. 



At present the following races may be dejfined and dis- 

 tinguished as subspecies : — 



1. Poliospiza burtoni buktoni Gray. A long-winged 

 form with a very broad and robust bill. Forehead white in 

 adult birds. Wings, S 88-91 mm., ? 85-87 mm. 



Hah. Mountains of Cameroon (Adamaua ?). 



2. Poliospiza burtoni albifrons Sharpe (Ibis, 1891, 

 p. 118 : Kikuyu). Smaller than the former and with a less 

 robust bill. Forehead also white in the adult birds. Wings, 

 c? ^o-^Q> mm., ? 80-83 mm. 



Hah. Highlands of Central Kenya Colony. 



3. ? Poliospiza burtoni monticola Reichenow (Orn. 

 Monatsber. 1910, p. 8 : Adamaua). 



Said to differ from P. h. alhifrons by having a broader 

 white frontal band. Wing in type 87 mm. 



Hah. Adamaua. (I have not seen any specimens of this 

 form, which possibly may be identical with P. h. hurtoni 

 Gray). 



4. Poliospiza burtoni kilimensis Richmond (Auk, xiv. 

 p. 115 (1897) : Kilimanjaro). 



Size similar to that of P. h. alhifrons, but distinguished 

 l)y having practically no white on the extreme forehead. 

 Bill as in P. h. alhifrons. Wings, (^ , 81-85 mm. 



Hah. Kilimanjaro and Meru. 



