ECONOMIC ZOOLOGY ENTOMOLOGY. 153 



harmful to other animals, except in one instance, where one product was 

 thought to be fatal to hens, but of this direct proof was lacking. The com- 

 parative cost for the extended areas used in this test was, per 100 acres, for 

 the Liverpool virus fl, for the ratin virus £2 5s., and for the Danysz virus 

 f 1 10s. 



Plague among ground squirrels in Contra Costa County, California, W. C. 

 RucKEB (Pub. Health and Mar. Hosp. Scrv. U. S., Pub. Health Rpts., 24 {1909), 

 No. 35, pp. 1225-1235). — The author states that there is reason to believe that 

 the booby owl. which is a constant companion of the ground squirrel, occupy- 

 ing the same burrows with it, may play an important role in the dissemination 

 of the epizootic. It is thought that this bird, flying from burrow to buri'ow, 

 may carry infected fleas for long distances. Squirrel eradicative agents and 

 the campaign against the ground squirrel are considered at some length. 



The birds of Ontario in relation to agriculture, C. W. Nash (Ontario Dept. 

 Agr. Bui. 113, pp. 95, pis. ^8). — This is the fourth edition of a work previously 

 noted (E. S. R., 13, p. 1023). 



Some indigenous insectivorous birds, S. H. Curnow {Jour. Dept. Agr. 8o. 

 Aust., 13 {1909), No. 1, pp. 17-20). — A brief account of some of the more 

 useful birds occurring in South Australia. 



Crustacea and Arachnids, edited by S. F. Harmer and A. E. Shipley {New 

 York and London, 1909. vol. /,. pp. XVIII +566, figs. 287).— This volume, which 

 completes the series entitled Cambridge Natural History, contains an account 

 of the Crustacea by G. Smith and W. F. R. Weldon, of the Trilobites, by H. 

 Woods, of the Arachnida, by A. E. Shipley, H. Woods, and C. Warburton, and of 

 the Pyenogonida, by D. W. Thompson. 



Classification of the Strongylidae, A. Railliet and A. Henry {Compt. Rend. 

 Soc. Biol. [Paris], 66 {1909), Nos. 2, pp. 85-88; 4, pp. 168-171).— Favt 1 of 

 this account is devoted to the Metastrongyllnse and part 2 to the AnkylostominiB, 

 this term being applied to those Strong^iidje that have a buccal capsule. Sis 

 genera and several species are described as new. 



Bibliography of Canadian zoology for 1907, L. M. Lambe {Proc. and Trans. 

 Roy. Soc. Canada, 3. ser., 2 {1908), Sect. IV, pp. 77-87).— This lists 113 titles 

 ascribed to 85 authors. 



Bibliography of Canadian entomology for the year 1907, C. J. S. Bethune 

 {Proe. and Trai}s. Roy. Soc. Canada, 3. ser., 2 {1908), Sect. IV, pp. 89-103).— 

 This lists 127 titles by 124 authors. 



A survey of the status of economic entomology in the United States, F. 

 SiLVESTRi, trans, by J. Rosenstein {BoL Quind. Soc. Agr. Itah, IJf {1909), No. 

 8, pp. 305-368; Hawaii. Forester and Agr., 6 {1909), No. 8, pp. 287-336) .—This 

 is a report on the present status of economic entomology, following a visit to 

 the United States including the Hawaiian Islands. Artificial methods of insect 

 control are considered but more particular attention is given to natural control. 



A light-weight, portable outfit for the study and transportation of ants, 

 Edith N. Buckingham {Amer. Nat., 43 {1909), No. 514, jyp. 6II-6I4, figs. 2).— 

 A brief description is given of the apparatus used by the author in biological 

 studies of ants. 



The relation of lepidoptera and other insects to the fertilization of the 

 Asclepiadaceae, particularly Araujia sericofera, J. K. d'Herculais {Compt. 

 Rend. Acad. Sci. [Paris], 148 {1909). No. 18. pp. 1208-1210) .—The author con- 

 cludes that the role of insects in the fertilization of the milkweeds is much less 

 important than that attributed to them by most naturalists. 



Revision of the Attidae of North America, G. W. and Elizabeth G. Peckham 

 {Trans. Wis. Acad. ScL, Arts and Letters, 16 {1909). pt. 1. No. 5. pp. 355-646, 

 pis. 23). — A genus and many species are described as new to science. 



