Publications Reviewed. 61 



Aleutian Islands, and Behring Sea in 1911. By A. C Bent. "We 

 Bailed from Seattle on May 19, and took the inside passage north 

 to Ketchikan, where we remained a few days to take on some 

 spar buoys, and from there we sailed out through Dixon Entrance 

 and nearly west across the Pacific Ocean to Unimak Pass. We 

 entered the Pass on June 4, anchored for the night at Akun Island 

 and reached Unalaska on June 5. After discharging our cargo and 

 coaling, we started on the western trip and among the Aleutian 

 Islands on June 10, with orders for the Talioma to return to 

 Unalaska on July 1. This gave us less than three weeks in which 

 to explore over eight hundred miles of difficult islands, an undertaking 

 for which three months would have been hardly time enough. We 

 cruised the whole length of the chain, however, and landd on Stka 

 Kiska, Attn. Tanaga, and Adak Islands, besides visiting the western 

 end of Unalaska Island, landing at Chernofski." The " Birds Noted 

 in the Aleutian Islands in June, 1911." comprise a list of G4 spe- 

 cies and subspecies, and the " Birds Noted in Behring Sea in July, 

 1911," 17 species and 5 subspecies. The paper contains many an- 

 notations of interest. It seems a pity that more time could not 

 have been devoted to this little known region. 



No. 37. Descriptions of Two New Species of Nun Birds from 

 Panama. By E. W. Nelson. These two species were collected 

 on Cerro Azul, Panama (altitude 800 feet), in March, 1911. by 

 Mr. E. A. Goldman. Only a single specimen of each was found. 



L. J. 



Instinct and Intelligence in Birds. By Professor Francis H. 

 Herrick. Reprinted from the Popular Science Monthly, June, July 

 and August, 1910. Pp. 5.32-.5r)S, 82-97. 122-141. "The instincts of 

 birds may be clased in a general way as (1) continuous instincts, 

 which are needed for the preservation of tlie individual, such as 

 preying, flight, concealment and fear, however subject to modifi- 

 cation through experience, and (2) i!he cyclical instincts, which 

 are necessary for the preservation of the race." 



The cyclical instincts, which of necessity are discontinuous, are 

 given as follows : 



1. Migration to Breeding Area ; o. Incubation and care of eggs ; 



2. Courtship and Mating ; H. Care of Young in Nest ; 



3. Nest Building ; 7. Care of Young out of Nest. ; 



4. Laying Eggs in Nest ; 8. Migration to Feeding Area. 



The question as to what causes bring about the recurrence of 

 these cyclical instincts is not discussed. Here is a fruitful field 

 for investigation. It is upon the proper attunement of these cy- 

 clical instincts that tlie continuance of the species depends. Thus 



