308 Capt. G. E. Shelley on the 



Key to the Species. 



a. A sharply defined basal half of the upper man- 

 dible red, and the bare skin round the eyes of 

 the same colour (fading in dried skins into 

 buff) ; remainder of the bill black, with the 

 exception, occasionally, of the basal portion 

 of the lower mandible. Tail-feathers dis- 

 tinctly narrower. Upper parts more or less 

 shaded with green. No trace of bars on any 

 portion of the plumage. 

 a'. Nape pale blue, strongly contrasting with the 



crest and mantle 1. C. macrourus. 



b\ Nape uniform with the crest and mantle .... 2. C. erythromelon. 



h. No portion of the lower mandible black. Upper 



mandible black, generally with a pale portion, 



but never with a sharply defined pale basal 



half. Tail-feathers distinctly broader. With 



no green shade on any portion of the plumage. 



i'. With some bright chestnut on the rump. 



6^. Middle and lower back black, with a broad 



white band down the centre 3. C. capensis. 



<?. Middle and lower back bright chestnut .... 4. C castanonotus. 



c'. Entire back dull brown, nearly uniform with 



the wings and tail. Throat with distinct 



bars. 



c^. Cheeks and ear-coverts brown like the crown. 



c^. Forehead jet-black. A larger amount of 



black on the throat. Upper mandible 



with a pale patch 5. C. nigricollis, 



cP. Forehead never jet-black. A less amount 

 of black on the throat. Upper mandi- 

 ble blackish with no pale patch .... 6. C. striatus. 

 d'^. Cheeks and ear-coverts white or nearly so. 

 With a pale patch on the upper man- 

 dible. 



d^. Crown brown 7, C. leucotis. 



e^. Crown white 8. C. leucocephalus. 



1. CoLIUS MACROURUS. 



Lanius macrourus , Linn. S. N. i. 1766^ p. 134. 



Colius seneffalensis, Gni, S. N. i. 1788, p. 842; Hartl. 

 Orn. W.-Afr. 1857, p. 155; Fischer, Zeitsehr. ges. Orn. 

 (Madaraz), 1844, p. 363 (Pangani). 



Colius macrourus, Gray & Mitchell, Gen. B. ii. 1849, 



