516 Recently published Ornithological Works. [Ibis, 



of 1916-17. For some reason or other the first observers 

 of this Grosbeak, Schoolcraft and Major Delafield, in the 

 Lake Superior District in the early twenties of the last 

 century, believed that it only appeared at twilight, and 

 hence its names — the specific one due to Wm. Cooper and 

 the generic one to Bonaparte. Both refer to this supposed 

 peculiarity, which, however, has no existence in reality. 



The last article, compiled from records made by members 

 of the Delaware Valley Ornithological Club by Mr. Stone, 

 deals with the spring migration of 1917 in the Philadelphian 

 area. It alludes to the abundance of Hudsonian Chickadees 

 and Evening Grosbeaks, and also to the lateness of the May 

 migrants, due probably to an abnormal spell of cold during 

 the first half of that month. 



El Horner 0. 



[El Horaero. Eevista de la Sociedad ornitologica del Plata para el 

 estudio y proteccion de las aves de la Argentina y paises vecinos, 

 Tomo i. N. 1, Octobre 1917. Museo Nacional de Historia Natural, 

 Biieuos Aires.] 



We welcome the appearance of a new contemporary 

 Journal of Ornithology from the Argentine. It is named 

 after one of the most characteristic birds of the pampas, 

 called the Oven-bird by English-speaking people, El Hornero 

 by the Spaniards, Furnarius r'ufus by systematic ornitho- 

 logists. It builds a nest of mud as large as a baker's oven 

 on a horizontal branch of a tree, hence its name, and is 

 figured in a little cut on the wrapper of the new Journal. 



The Editor of ' El Hornero ' is Dr. lloberto Dabbene, of 

 the Buenos Aires Museum, and after a short introduction on 

 the constitution and prospective work to be undertaken by 

 the new society, he contril)utes an account of the Swifts 

 found in Argentina, with a key to the genera and series of 

 figures illustrating the generic characters modelled on those 

 to be found in Ridgway's works, together with a list of 

 species with full references. In another article, also by the 

 editor, is an account of a collection of birds recently made 

 on the little island of Martin Garcia lying in the estuary of 



