Mr. R. B. Sharpe's Catalogue of Accipitres. 363 



Cameroon Hawk, are white, broadly barred with black ; and it 

 also exhibits traces of transverse bars on the outer rectrices. 



Scelospizias unduliventer may reasonably be considered 

 a subspecies of >S^. tachiro ; and if the still more brightly 

 coloured race from the Gold Coast {Astur macroscelides , Hart.) 

 be admissible as distinct from S. unduliventer , it must also 

 be considered a subspecies, and it has been so treated in 

 Mr. Sharpe's catalogue. 



Mr. Sharpe gives the locality of S. macroscelides as " Gold 

 Coast to Gaboon ;" but the Gaboon race is in reality much 

 more distinct from the true S. macroscelides of the Gold Coast 

 than the latter is from S. unduliventer of Senegambia and 

 Abyssinia, being not only darker and more richly coloured, 

 both in the slate-coloured and in the rufous portions of the 

 plumage, but also much smaller, as will be seen from the fol- 

 lowing measurements of an adult male and female, obtained 

 by Mr. H. T. Ansell at the river Danger, Gaboon, and now 

 preserved in the British Museum : — 



S • From the river Danger. 

 5 . From the river Danger . 



This Gaboon race is entitled to the specific name of casta- 

 nilius (Bon.) ; and the type specimen, an adult male, is also 

 in the collection at the British Museum, whither it was trans- 

 mitted by the late Messrs. Verreaux, who, by some unfor- 

 tunate accident, labelled it as having been obtained in New 

 Granada, in consequence of which it was so described by the 

 late Prince C. L. Bonaparte in the Bev. de Zoologie for 1853, 

 p. 578, and subsequently figured as an American species by 

 Messrs. Sclater and Salvin at pi. 18 of ' Exotic Ornithology/ 



This specimen is described in Mr. Sharpens Catalogue under 

 the title of Micrastur castanilius, the mistaken locality and 

 a somewhat too cursory examination of the scutellations of 

 the tarsus having led to its inadvertent admission by Mr. 

 Sharpe into the genus Micrastur. 



The specimens figured in Mr. Sharpe's Catalogue under the 



