141 [Vol. xl. 
way to the F. hildebrandti group, in which the male and 
female are most distinct. 
Type. A & collected by S. A. Neave on the east bank of 
the Loangwa River in North-Eastern Rhodesia, 6 June, 1905, 
at 2200 ft. Brit. Mus. Reg. No. 1905.12. 29. 2. 
Range. North-Hastern and probably North-Western 
Rhodesia. 
Francolinus erckeli pentoni, subsp. nov. 
This is a well-defined race of F. erckeli Riipp. from Tigré. 
It differs in its paler colour throughout, the general ground- 
colour being dove-grey and not olive-brown. The red on 
the crown is lighter than in the typical race and does not 
extend so far down the nape, and the neck feathers have 
wider white margins. The rufous edges of the feathers of 
the mantle are lighter, while the barring of the secondaries 
is obsolete and replaced by a fine mottling. \Underside 
much as in the typical race, but the general appearance 
lighter and the shaft streaks of the breast feathers longer. 
Size as in the typical race. 
Type. A & collected by Mr. A. L. Butler at Erkowit in 
the Red Sea Province of the Sudan at 4000 ft. on 22 March, 
1906. B.M. Reg. No. 1916.9. 20. 645. 
The race is named after Surgeon-Captain Penton who, as 
mentioned by Sharpe (Bull. B. O. C. iii, 1893, p. 4). 
discovered this species at Hrkowit. 
Range. As far as is known confined to the forest district 
round Erkowit. 
Francolinus castaneicollis ogoensis, subsp. nov. 
Differs from F., c. castaneicollis Salvadori, from Lake 
Chercher in being greyer, less brown in ground-colour above. 
Feathers of mantle grey, not so black ; chestnut of neck 
paler ; crown grey or greyish brown, less chestnut. 
Type. A é collected by Mr. G. F. Archer at Sheikh 
Pass, Ogo district of British Somaliland, at 4500 ft. on 
6 June, 1918. Collection No. 768. 
