Vol. xli.] 18 



Marra, Darfur, collected on 6th April, 1920, by Captain 

 Lynes. Altitude 8000 feet. 



Dimensions of the type : — Wing 70 mm., tail 55, tarsus 

 19-5, bill 11. 



Nine specimens collected in Jebel Marra : — 



Seven adult males : Wings 70-71 mm., tails 51-56. 



Two adult females : Wings 67-68 mm., tails 51-56. 



Myrmecocichla aethiops sudanensis, subsp. nov. 



" Sudan Ant-Chat." 



Nearest to M. (Btldops cetJtiops Cab., from Senegal, but 

 much smaller (Black Chat size instead of Thrush size). In 

 full adult plumage both sexes of M. ce. cethiops become almost 

 uniform black ; but at all ages M. ce. sudanensis apparently 

 remains snufF-brown, with conspicuous light dappled head 

 and hind neck. Below, cctliiops has a slight mottling of 

 light feather borders from chin to upper breast, whereas in 

 sudanensis the mottling is very marked down to the crop. 



Type. In the British Museum. An adult male from 

 El Fasher, Darfur, collected on loth March, 1920, by 

 Captain Lynes. 



Dimensions of the type : — Wing 101 mm., tail ()>^^ 

 tarsus 31, bill 15. 



Fourteen specimens collected in Darfur and Western 

 Kordofan : — 



(Four not sexed with certainty.) 



Six adult males : Wings 99-102 mm., tails G4-70. 



Four adult females : Wings 98-106 mm., tails 64-71. 



Prionops concinnata ochracea, subsp. nov. • X^rrt- 



" Ochraceous Helmet-Shrike.'^ ^' 



A now form of the " concinnata " group (as described by 

 Sclater in Shelley's * Birds of Africa,' viz. with the white 

 wing-patch and incurving sides of the helmet abaft all). 



This form has a similar colour-pattern to " concinnata " 

 of the Eastern Sudan, Bahr-el-Grhazal, etc., but has no 

 pure grey and practically no pure v/hitc, and looks as if 

 its whol« plumage had been painted over with a wash of 



