331 
1921 .] Recently 'published Ornithological Works. 
It is interesting to observe that on the sonth-west coasts of 
Africa, where conditions are very similar, the same course 
has been adopted, though there the control of the islands is 
directly under the government of the Union of South Africa. 
The three most important guano-producing birds are the 
Alcatraz (P elec anus thagus), the Piquero (Sula variegata ), 
and the Cam an ay [Sula nebouxi). Of these, and of the 
methods and operations of obtaining the guano, Mr. Murphy 
has given a most lucid account illustrated by numerous and 
beautifully reproduced photographs, and the articles are 
well worthy of perusal bv all those interested in the in¬ 
dustrial application of ornithology. 
To his two predecessors in the investigation of the guano 
islands, Dr. H. O. Forbes and Mr. R. E. Coker, of the 
United States Bureau of Fisheries, Mr. Murphy pays a 
well-deserved tribute. An interesting discovery is that 
these seas are the winter home of the Northern or Red¬ 
necked Phalarope (Phalaropus lobatus) ; its winter quarters 
in the New World had been hitherto unknown. 
Peters on a new Jay. 
[A new Jay from Alberta. By James Lee Peters. Proc. New 
England Zool. Cl. vii. 1920, pp. 51-52.] 
Mr. Peters describes Perisoreus canadensis albescens as a 
distinct race from Red Deer, Alberta, Canada. It is distin¬ 
guished from all the other races of the Canada Jay by its 
much paler coloration. The type is in the Museum of 
Comparative Zoology at Cambridge, Mass. 
Ridgway on new Genera of Birds. 
[Diagnoses of some new Genera of Birds. By Robert Ridgwav. 
Smithson. Miscel. Coll. Washington, vol. lxxii, no. 4, 1920, pp. 1-4.] 
The following new Genera of Hawks and Rails are 
proposed, no doubt in anticipation of a forthcoming volume 
of the ‘Birds of North and Middle America 9 :—Oroaetus 
for type Spizaetus isidori (Vieill.) ; Pheeoaetus for type 
z 2 
