340 Recently published Ornithological Works. 



45. liidyway on a new North- American Hawk. 



[On a Tropical American Hawk to be added the North-Ameiican 

 Fauna. By Robert Ridg-way. Bull. Nuttall Ornith. Club. \i. p. 207.] 



The species is Buteola brachyura, of whicli an adult male 

 was obtained in Florida by Mr. G. A. Boardman in February 

 1882. The question of the relationship oi Buteo fuliyinosus, 

 Sclater, to this bird is carefully discussed. jSlr. J. H. Gurney 

 and Air. Salvin now agree in considering i>w/<"o /;«/i//2W052^5 to 

 be merely a black phase of B. brachyura ; but Mr. Ridgway 

 is, apparently, not quite convinced that such is the case. 



46. Ridgway on the Desiderata of the U.S. National 

 Collection. 



[List of special Desiderata among North-American Birds. Hy Robert 

 Ridgway. Proc. U.S. Nat. Mus. 1881, p. 207.] 



The list is a long one,but is chiefly made up of species of 

 which the young plumages are required. The North-American 

 species actually unrepresented in theU.S. National Collection, 

 as may be well supposed, are very few in number. 



47. Shufeldt on the Osteology of the ISorth- American 

 Tetraonidm. 



[Osteology of the North-American TetraonidiC. By Dr. R. W. Shu- 

 feldt, U.S.A. Bull. U.S. Geol. & Geogr. Survey, vi. p. 319.] 



This is an elaborate account of the osteology of the North- 

 American Grouse, illustrated by eight plates, principally de- 

 voted to the various bones of Centrocercus and Cupidonia. Of 

 the former of these genera the bones of the chick and imma- 

 ture form (two months old) are likewise figured. It would 

 have been very convenient for classification-purposes if the 

 author had stated the osteological differences between the 

 six genera (as usually allowed) in a concise form. He does, 

 however, inform us that, from an osteological point of view, 

 he can see no reason why Pedioecetes and Cupidonia should 

 not be united. 



