Book News and Reviews 



28s 



which has thus far been prepared of any 

 American bird. 



Bird-Lore's readers do not have to be 

 assured of Dr. Allen's success as a bird 

 photographer, and the thirty-odd photo- 

 graphs illustrating this article bear witness 

 both to his skill with a camera and good 

 judgment in the selection of subjects. — 

 F. M. C. 



An Account of the Mammals and 

 Birds of the Lower Colorado 

 River, with Especial Reference to 

 THE Distributional Problems Pre- 

 sented. By Joseph Grinnell, Univ. 

 of Calif. Pub. in Zool. Vol. 12, No. 4, 

 pp. 51-294; pis. 13; figs. 9. 



The observations and specimens on 

 which this paper is based were gathered 

 by its author, Frank Stephens, Joseph 

 Dixon, and L. Hollister Jones. Working 

 with funds provided by Miss Annie M. 

 Alexander, founder of the California 

 Museum of Vertibrate Zoology, they 

 began operations at the Needles on the 

 Colorado River, on February 15, and 

 reached Yuma May 3, and concluded 

 their work a few miles farther south on 

 May 15, 1910. Transportation was pro- 

 vided by a scow and a skiff, while the 

 current supplied the motive power. 

 Twenty-nine camps were made, some on 

 the Arizona, some on the California side 

 of the river. These served as bases from 

 which the immediately surrounding coun- 

 try was explored. 



Collections were made of birds, mam- 

 mals, reptiles, amphibians, a few fishes, 

 and the more conspicuous plants. No less 

 important than the specimens themselves, 

 and greatly increasing their value, are 

 the observations made on the country 

 traversed by the trained naturalists com- 

 posing the party. 



The results, as contained in this report 

 on the birds and mammals secured, is 

 therefore not merely a systematic treatise, 

 but an important contribution to our 

 knowledge of the manner of occurrence 

 and habits of the species concerned, and 

 particularly, as the title of the paper 

 states, to the distributional problems 

 presented. 



It is this portion of the paper which 

 makes it of value to the student of 

 faunistics, whatever be the group of 

 animals to which he devotes himself. We 

 cannot at this time give to this paper the 

 attention it deserves,'but wemay at least 

 present Mr. Grinnell's 



Classification of Barriers to Species as Regards 



Birds and'Mammals 

 Barriers 



A. Tangible (mechanical). 



(a) Land to aquatic species. 



(b) Bodies or streams of water to ter- 

 restrial species. 



B. Intangible (non-mechanical). 



(a) Zonal (by temperature). 



(b) Faunal (by atmospheric humidity). 



(c) Associational. 



(i) By food-supply. 



(2) By breeding-places. 



(3) By temporary refuges. 



(Each of these three with regard to the 

 inherent structural characters of each 

 species concerned). — F. M. C. 



A Distributional List of the Birds 

 OF Arizona By Harry S. Swarth. 

 Pacific Coast Avifauna, No. 10; Cooper 

 Orn. Club, Hollywood, Calif. May 25, 

 1914. 133 pp., map. Price $1.50. 



To its noteworthy series of special 

 publications on western birds the Cooper 

 Club now adds this authoritative list of 

 Arizona birds. It includes 362 species and 

 subspecies which are classed as follows: 



Resident 152 



Summer Visitant 72 



Winter Visitant 57 



Transient 30 



Of Casual Occurrence 51 



In addition to the main annotated list 

 (pp. 9-81), nominal lists of species are 

 given under these seasonal headings, and 

 there are also similar lists under faunal 

 headings. A colored faunal map and a 

 bibliography add to the valv ->£ this 

 paper. — F. M. C. 



The Ornithological Magazines 



The Condor. — The March 'Condor' 

 it an unusually large number with its 



