On some new Central-Asiatic Birds. 487 



One in the Derby Museum, Liverpool, which may be the 

 type, obtained at Alagnak, 69|° N. lat., Melville Peninsula, 

 23rd June 1823. 



One in the Edinburgh University Museum, marked £ , 

 Iglo/lik, Melville Peninsula, 27th June, 1823. 



One in the University Museum, Cambridge, from Green 

 Island, Disco Bay. 



Three in the Copenhagen Museum, from Disco Bay. 



One from Fseroe Islands (Suderoe), in Herr Benzon's col- 

 lection. 



One from Heligoland, Herr Gaetke's collection. 



Two in Mayence Museum, Kamtchatka ? 



One in Sir William Milner's collection, said to have been 

 killed in Yorkshire. This one has no black collar. 



Total eleven. 



Besides these there is said to be another in Copenhagen, 

 obtained by Holboll. 



XLYI. — Notes on some new Central-Asiatic Birds. 

 By Dr. N. Severtzov. 



PlCUS LEPTORHYNCHUS, Sev. 



This species, though closely allied to P. major, which it 

 represents in the evergreen-tree groves of the lower Tian- 

 shan, in the Turkestan gardens, and the saxaul [Haloxylon 

 ammodendron) forests of the desert, yet shows a constant 

 difference, which I have verified by an examination of about 

 forty specimens of each species. The comparative diagnoses 

 of the two are as follows : — 



Picus leptorhynchus : Bill slender ; hinder wing-coverts, on 

 the humero-cubital articulation, white to the smallest upper 

 ones inclusively; secondary quills with but three (only two 

 uncovered by the larger tectrices) very broad white mark- 

 ings on each web, and a continued white outside edge, at least 

 on the tertiary quills, sometimes also on most secondaries; 

 primaries also with broad white markings, and, though the 



