ECONOMIC ZOOLOGY — ENTOMOLOGY. 153 



that different experiments using the densities of different concentrates as bases 

 for dilution can not be compared accurately, so far as spray injury is concerned. 



In an investigation made of means for the prevention of lime-sulphur injury 

 it was found that it could be prevented to some extent by a considerable dilu- 

 tion of the solution or by the use of substances that would render the sulphids 

 insoluble. Among those tested were iron, copi")er, and zinc sulphates, sulphuric 

 acid, and carbon dioxid. 



The author considers self-boiled lime sulphur to be a mixture of lime and 

 sulphur rather than a combination. Much of the injury attributed to lime- 

 sulphur sprays he attributes to other causes, particularly to sunburn. 



Spreading- capacity and adherence of sprays, V. Vermorel and E. Dantony 

 (Prog. Agr. et Tit. (Ed. VEst-Ccntre), 3/f {1913), No. 25, pp. 778-780).— This is 

 a brief general discussion of the constitution of sprays intended for ordinary 

 protective purposes ; also of those intended to be especially adapted to spread- 

 ing on application or to adherence under adverse weather conditions, or to 

 both these purposes. 



Preparation of alkaline sprays, V. Veemorel and E. Dantony (Pi'og. Agr. 

 et Vit. (Ed. VEst-Centre), 54 (191S), No. 24, pp. 7//5, 74^).— The authors give 

 formulas and directions for the preparation of Bordeaux and Burgundy mix- 

 tures claimed to possess superior qualities as regards both spreading and 

 adhesion, casein and gelatin being employed for this purpose. 



ECONOMIC ZOOLOGY— ENTOMOLOGY. 



Game protection and propagation in America, H. Chase (Philadelphia and 

 London, 1913, pp. V-\-238). — A handbook of practical information for officials 

 and others interested in the cause of conservation of wild life. 



Game law blue book, C. B. Reynolds (New York, 1913, pp. 136). — A com- 

 pilation of the game and fish laws of the various States and of Canada, revised 

 to date. 



Bats and their extermination, W. A. Daley (Pud. Health [Landon], 21 

 (1913), No. 1, pp. 23-28). — This paper draws attention to the public health 

 aspects of the rat problem and the methods of destroying these pests. 



Rat proofing a municipal sewer system, F. Simpson (Pw&. Health Rpts. 

 [U. S.'\, 28 (1913), No. U, pp. 2283-2290) .—A report of an investigation con- 

 ducted with a view to finding a practical method of rat proofing the sewer 

 system of San Francisco. 



A history of the game birds, wild fowl, and shore birds of Massachusetts 

 and adjacent States, E. H. Forbush (Boston: Mass. Bd. Agr., 1912, pp. XTV-f- 

 622, pis. 37, figs. i08).— Following a brief introduction (pp. 1-35) the subject 

 is dealt with under the headings of (1) a history of the birds now hunted for 

 food or sport in Massachusetts and adjacent States (pp. 89-396) ; (2) a history 

 of the game birds and other birds hunted for food or sport, which have been 

 driven out of Massachusetts and adjacent States, or exterminated, since the 

 settlement of the country (pp. 399-^94) ; and (3) the conservation of game 

 birds, wild fowl, and shore birds (pp. 497-595). 



Insect porters of bacterial infections, C. J. Martin (Brit. Med. Jour., 1913, 

 Nos. 271Jf. pp. 1-8, figs. 12; 2715, pp. 59-68, figs. 12).— A summarized account 

 delivered before the Royal College of Physicians. 



Insect record for 1912 in Massachusetts, H. T. Fernald (Massachusetts 

 8ta. Rpt. 1912, pt. 2, pp. 85-87). — The year was made notable by the large num- 

 ber of different insects, some 400 forms, about which inquiries were made. 

 Among the more important were various plant lice; the elm leaf beetle; the 

 bronze birch borer (Agrilus anxius) ; the apple tree tent caterpillar; the apple 



