THE IBIS. 



TENTH SERIES. 



Cj^SOiii^n (iSij.. 



r AUG 2 4 1Q" 



Vol. VI. No. 3. JULY 1918. \ ^ ^^ 



%fif Mus^^ '/^ 



XX. — Remarks on the Hawks of the Genus Micrastur. 

 By W. L. ScLATER, M.A., M.B.O.U. 



(Plate VIII.) 



Recently, while recataloguing and rearranging the Accipi- 

 trine Birds in the Natural History Museum, I found a 

 hitherto undescribed species of the genus Micrastur which 

 was briefly characterized at a meeting of the B. O. C. in 

 March last (Bull. B. 0. C. xxxviii. 1918, p. 44). As the 

 birds of this genus are not very well known and have not 

 had much attention in literature of late years, I am now 

 off'ering a few further remarks on the genus to accom- 

 pany the coloured plate of the new form prepared by 

 Mr. Gronvold. 



Genus Micrastur. 



Micrastur Gray, List Gen. Birds, 1841, p. 6. 



Type, Fatco brachijpterus Temm., = M. melanoleuciis 

 (Vieill.). 



A good discussion of the characters of the genus is given 

 by Ridgway (Proc. Acad. Philad. 1875, p. 476). 



SICK. X. VOL. VI. 2 c 



