110 Recently published Ornithological Works. 



acuta) caught in October on the North-Frisian Islands — namely 

 about 24,000, against more than double that number in the 

 autumn of 1877. The importance of other notes, again, must 

 be evident, as, for instance, those on Accentor alpinus, Gypsful- 

 vu^, &c. And we have no doubt that, after the great amount of 

 material which these Reports contain has been properly worked 

 out, the summary conclusions arrived at will prove a valuable 

 contribution to our knowledge of Central-European bird-life. 



30. Ridgway on Costarican Birds. 



[Notes on some Costarican Birds. By Robert Ridgway. Proc. U.S. 

 Nat. Mus. 1881, p. 333.] 



Mr. Ridgway's notes relate to specimens sent to the Na- 

 tional Museum by Sr. Zeledon of San Jose. He describes as 

 new Troglodytes (?) ochraceus and Acanthodops bairdi, a new 

 genus and species of Dendrocolaptidae, allied to Automolus , 

 bat with an almost Fringilline bill. 



31. Ridgway on new Birds from the Sandwich Islands. 



[Description of a new Flycatcher and a supposed new Petrel from the 

 Sandwich Islands. By Robert Ridgway. Proc. U.S. Nat. Mus. 1881, 

 p. 337.] 



The species described are Chasiempis sclateri and Cymo- 

 chorea cryptoleucura, both from Kaui {Knudson). 



32. Ridgway on a new Owl. 



[Description of a new Owl from Portorico. By Robert Ridgway". 

 Proc. U.S. Nat. Mus. 1881, p. 3G6.] 



The new Owl is allied to our Short-eared Owl, Asio accipi- 

 trinus (melius brachyotus), and is named Asio portoricensis. 

 Mr. Ridgway criticises Mr. Sharpens arrangement of the 

 Short-eared Owls, and gives diagnoses of the three species 

 which he recognizes — namely A. accipitrinus, A. portori- 

 censis, and A. galapagoensis. Mr. Ridgway is " entirely 

 unable to distinguish between continental specimens of Asio 

 brachyotus from any part of the world.^' 



