ECONOMIC ZOOLOGY ENTOMOLOGY. 449 



fungus have been established on salep agar and on Hevea wood, and inocuhi- 

 tion experiments with natural material and with that from pure cultures have 

 been successful. 



Spraying is not recommended except in particular cases, the most effective 

 measure being removal of infected branches, or treatment of these portions 

 with tar. 



ECONOMIC ZOOLOGY— ENTOMOLOGY. 



Kevision of the pocket gophers of the genus Thomomys, V. Bailey (?7. S. 

 Dcpt. Agr., Bur. Biol. Surrey North American Fauna No. 39 (1915), pp. 136, pis. 

 8, figs. 10). — This paper completes the technical revision of the pocket gophers 

 of the family Geomyidiie, the first part of which, prepared by Merriam, has been 

 previously noted (E. S. R., 6, p. 787). The revision supplies definite informa- 

 tion regarding the status and geographical distribution of the several forms. 

 The pocket gophers are found to be of considerable economic importance, their 

 tunneling resulting in damage to crops, young trees, irrigation ditch banks, etc. 



The genus is said to include 88 recognizable forms of 40 species. 



Notes on the progress of economic entomology, L. O. Howard {Jour. Econ. 

 Euf., 8 {1915), No. 1, pp. 113-119; Proc. Soc. Prom. Agr. Sci., 35 {1914), pp. 

 95-101). 



Insecticides, H. M. Lefroy {Ann. Appl. Biol., 1 {1915), No. 3-4, pp. 280-298, 

 fig. 1). — A discussion of the present use of insecticides, the manner in which 

 they act, etc. 



Insecticides from a chemical standpoint, W. F. Cooper and W. H. Ntjttall 

 (Ann. Appl. Biol., 1 {1915), No. 3-4, pp. 213-219).— A. critical review of the 

 subject. 



The principal insect pests of Florida and California compared, H. S. Faw- 

 CETT {California Sta. Bui. 262 (1915), pp. 193-199, 203-206, fig. 1).—A brief com- 

 parison is made of the more important citrus insects of Florida and California. 

 A table comparing citrus insect pests of California, Florida, and Cuba is in- 

 cluded (pp. 203-206). 



A preliminary list of the insects of the Province of Quebec, I— II (Ann. 

 Rpt. Quebec Soc. Protec. Plants [e^c], 4 (1911-12), Sup., pp. 103, figs. 19; 7 

 (1914-15), pp. 108-159) .—Part 1 of this work by A. F. Winn lists the Lepidop- 

 tera, and part 2 by A. F. Winn and G. Beaulieu the Diptera. 



The effect of the injuries to summer-sown crops by the frit fly and by 

 Adia genitalis on the growth and yield of the plants, N. V. Andreeva and I. V. 

 KiTRuiuMov (Trudy Pcrvago Vseross. Sie::da Dieiatel. PriJcl. Ent., Kiev, 1913, 

 pp. 25-36; abs. in Rev. Appl. Ent., 3 (1915), Ser. A, No. 5, pp. 230-232).— A 

 report of investigations conducted at the Poltava Experiment Station during 

 the summer of 1913. 



Effects produced by sucking insects and red spider upon potato foliage, 

 A. S. Horne and H. M. Lefroy (Ann. Appl. Biol., 1 (1915), No. 3-4, pp. 370-386, 

 pis. 5). — This is a report of a series of experiments conducted with a view to 

 determining accurately what effects are produced in potato foliage by sucking 

 insects. 



" Definite and similar symptoms apart from any other cause were obtained 

 as the result of infesting young plants raised from seed of the President variety 

 of potato with red spider, Aleyrodes, aphis, jassid, and capsid under various 

 experimental conditions." 



Notes on the insect enemies of Sudan grass, W. Newell (Jour. Econ. Ent., 

 8 (1915), No. 2, pp. 2.?0-25i).— Substantially noted from another source (E. S. 

 R., 33, p. 746). 



