188 Recently published Ornithological Works. 



regard to the localities treated. Mr. W. Craig writes on the 

 expression of Emotion in Pigeons, one contribution referring 

 to the Passenger Pigeon, the other to the Mourning Dove, 

 and draws attention to an article on the Collared Turtle 

 Dove in another periodical. Mr. H. E. Ewing discusses 

 the difference between the Chicken Mite and the Bird 

 Mite (two cuts), and has made the discovery that the former 

 is disseminated by the English Sparrow in America. Mr. 

 A. H. Thayer had demanded an investigation of his tests of 

 the " effacive power of patterns," so Dr. J. A. Allen takes 

 up the cudgels in a review of Dr. Roosevelt's " Revealing 

 and Concealing Coloration in Birds and Mammals," and, 

 while giving ]Mr. Thayer full credit for the discovery of an 

 overlooked principle in optics, comments on the fact that 

 his tests are carried out with artificial backgrounds and with 

 an absence of the motion that would be present in the living 

 creature. 



As regards individual species of birds, Mr. S. M. Gron- 

 berger translates for ' The Auk ' a description by a Stockholm 

 medical student (A. R, Martin, 1759) of a Petrel supposed 

 to haA^e been a Fulmar, this being the earliest description 

 extant. Mr. J. Grinnell traces, by means of a map and 

 an explanation thereof, the distribution of the "Western 

 Mocking-bird in California ; Mr. J. C. Phillips writes on 

 unusual flights of Canada Geese in Massachusetts in 1910; 

 Mr. A. Saunders on the nesting of the Cedar Waxwing ; 

 Messrs. Taverner and Swales on the Migration of the 

 Saw- whet Owl; Dr. C. W. Townsend on the Courtship and 

 Migration of the Red-breasted Merganser ; Mr. G. Nelson 

 on the Brown Pelican in Florida, which he has observed to 

 breed for twelve consecutive months (four pis.) ; while in 

 the '^ General Notes " Mr. J. L. Peters corrects some 

 statements made about Brewster's Warbler. 



A summary by Mr. G. Eifrig on Bird Protection abroad, 

 and local papers by Mr, O. VVidmanu on his observations at 

 Estes Park, Colorado, by Mr. A. B. Howell on Cobb's 

 Island, Virginia, and by Messrs. Cobb and Brooks on Eastern 

 Alberta, complete the two numbers. 



