10191 ECONOMIC ZOOLOGY — ENTOMOLOGY. 353 



which requires about 4 days in direct sunlight and 12 or 14 days in the shade, 

 which is preferred by the skunk currants. Rain, occurring shortly after the 

 treatment is applied, may to a great extent protect the buds and twigs. Indi- 

 vidual plants differ considerably as regards resistance. Other and generally 

 less effective sprays tested include sodium arsenite, salt solution, kerosene, 

 and other compounds. 



Report of conference re disease attacking plane trees (Jour. Dept. Agr. 

 Victoria, 15 {1911), No. 7, pp. 443-U7, figs. 2).— This is a report of the discus- 

 sion at a conference of experts held on February 21, 1917, regarding a new and 

 destructive disease attacking plane trees in many portions of Victoria, in some 

 of which considerable injury was done. The causal fungus is Glwosporium 

 nerviscqtium on leaves, Myxosporium valsoideum on branches. Recommenda- 

 tions regarding tlie control of the disease included early whiter pruning, de- 

 struction of all prunings and leaves, spraying with Bordeaux mixture all 

 winter and also upon resumption of growth in spring, and careful inspection 

 of all nursery stock. 



Cultures with Melampsorae on Populus, J. R. Weir and E. E. Hubert 

 (Mijcologia, 10 {1918), No. If, pp. 194-198). — The authors, reporting on further 

 work with some of the fungi formerly studied (E. S. R., 38, p. 253), state that 

 the rusts of Populus, hitherto distinguished as Melampsora medusw and M. 

 albertensis, are able to infect both Pseudotsuga and Larix. It is suggested that 

 these two fungi are only different host manifestations of the same species, 

 which should be referred to M. viednsw. Two new hosts recorded for this rust 

 are L. lyalli and P. macrocarpa. New features are reported in regard to produc- 

 tion of pycnia in the Melampsorse. 



ECONOMIC ZOOLOGY— ENTOMOLOGY. 



California ground squirrels {Mo. Bui. Cat. Com. Hort., 7 {1918), No. 11-12, 

 pp. 593-807, pis. 6, figs. 67). — A comprehensive account of the life histories, 

 habits, and methods of control of ground squirrels in California is here pre- 

 sented as follows: Natural History of the Ground Squirrels of California,. by J. 

 Grinnell and J. Dixon (pp. 597-709) ; The Columbian Ground Squirrel {CiteUus 

 coluvibianu-s Columbia mis) , by W. T. Shaw (pp. 710-720) ; A History of Ground 

 Squirrel Control in California, by W. C. Jacobsen (pp. 721-761) ; A Study of 

 Fumigation IMethods for Killing Ground Squirrels, by J. S. Burd and G. R. 

 Stewart (pp. 762-765) ; The Work of the Rodent Control Division, by S. V. 

 Christierson and C. A. Wilkins (pp. 766-780) ; and Rodent Eradication Work 

 of the Biological Survey in Califoimia, by F. E. Garlough (pp. 781-789). Direc- 

 tions and formulas for destroying noxious rodents and a complete index are 

 included, as are colored plates of ground squirrels, by L. A. Feurtes and others. 



Destruction of live stock by predatory animals and their practical means 

 of destruction, M. E. Musgrave {Proc. Ann. Con v. Ariz. Cattle Gro)vers' Assoc, 

 12 {1919), pp. 111-113). 



The principal species of birds protected by law in Egypt, S. S. Flower and 

 M. J. NicoLL {Cairo: Min. Agr., Egypt, 1918, pp. IV+8, pis. 8). — A list of the 

 principal species, giving their English, French, Arabic, and scientific names, 

 their local status, their approximate size, and concise notes on their coloration, 

 for purposes of identification. Illustrations of 26 species in colors are included. 



Description of a new Conurus from the Andaman Islands, H. C. Oberhol- 

 SER {Proc. Biol. Soc. Wash., 32 {1919), pp. 29-32). 



An unrecognized shrew from Warren Island, Alaska, H. H. T. Jackson 

 {Proc. Biol. Soc. Wash., 32 {1919), pp. 23, 24). 

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