Letters , Announcements , 6^c. 605 



Surgeon U.S. Army, describes at full length the various 

 bones which are comprised in the skeleton of these two birds. 

 Mr. Shufeldt's memoir would, perhaps, have been of greater 

 general use if further points of comparison between the two 

 forms and their allies had been given. Four well-drawn 

 plates illustrate the memoir. 



LII. — Letters, Announcements, ^c. 



We have received the following letters addressed to the 

 Editors of ' The Ibis ^— 



British Museum, Juue 25th, 1881. 



Sirs, — The name which I proposed in 'The Ibis^ for the 

 beautiful Laniarius nigrithorax of the Gold Coast being a 

 vox hybrida, which I ought to have known better than to 

 compound, I am anxious to change it into a more classically 

 correct one, and propose to alter it into melanothorax . 



A similar instance occurs in Cinclosoma castaneothorax of 

 Gould, which ought to be altered, and which I suggest should 

 henceforth be called erythrothorax. 



I am, &c., 



R. BOWDLER ShARPE. 



Turin, Zoological Museum. 

 Juue 30th, 1881. 



Sirs, — In the April number of ' The Ibis ' for this year 

 (pp. 258-267) are some " Notes on some Hawks of the Sub- 

 genera Cooper astur and Urospizias," by Mr. Gurney, con- 

 cerning which I have to offer a few remarks. 



Mr. Gurney describes and figures a young specimen, 

 marked as male by the collector, of Urospizias albigularis : 

 this is described as smaller than the type specimen in the 

 British Museum, and more so than the type specimen of U. 

 meyerimius (Sharpe), which is the largest of the three ; so that 

 Mr. Gurney is ready to conclude ''that the still larger U. 

 meyerianus (Sharpe) is not " (as supposed by me) " the female 



SER. IV. VOL. V. 2 T 



