Becenthj puhlinhed Ornithological TForks. G77 



Macrochires (Trocliilidce and Cypselidse) and the Ileterodac- 

 tylse, which are represented^ within the limits of tlie work, 

 only by the Trogons. 



The number of species and subspecies described in the 

 volumes no\v out is 2038. From 1150 to 1.200 forms remain 

 to be treated in subsequent parts of the work. 



In the general treatment of his subject j\Ir. Ridgway 

 pursues exactly the same plan as in his four previous 

 volumes. As our readers are well aware, we differ from him 

 in many points as regards our observance of the rules of 

 nomenclature^ but we cannot withhold our admiration of the 

 skill and energy which he has devoted to his arduous task, 



103. SalvaJori on a new Parrot. 



[Nuova specie del geuere Tanygnathus, descritta da T. Salvadori. 

 Anu. Mus. Civ. St. Nat. Genova, ser. 3, vol. v. (1912).] 



Count Salvadori bases his new species on a single speci- 

 men iu the Civic Museum of Genoa, and calls it Tanygnathus 

 heterurus. The locality is not known. It has some resem- 

 blance to T. everetti. 



] 04. Sassi on a new Owl. 



[Eine neue Obreule aus Zeutralat'rika. Vou Dr. ^Nloritz Sas.si. Sitz- 

 Ak. Wiss. Wieu, Mai 2, 1912.] 



Dr. Sassi describes a new subspecies of Owl, of which an 

 example has been obtained by Herr Grauer on the western 

 coast of Lake Tanganyika, as Asio abessinicus graueri, 



105. Scluter on the Birds of Colorado. 



[A History of the Birds of Colorado. By Williani Lutlej Sclater. 

 London : Witherby & Co., 1912; pp. i-xxiv, 1-576, 17 pis. and map.] 



This excellent and comprehensive work on the Birds of 

 one of the United States is founded on a collection formed 

 by JVIr. C. E. Aiken of Colorado Springs, and presented to 

 Colorado College by the late General W. J. Palmer, to whom 

 the book is dedicated. Other collections and other authorities 

 have been laid under contribution to make the volume as 



