1918.] ECONOMIC ZOOLOGY ENTOMOLOGY. 653 



remarks, and (10) related species. A glossary of technical terms, a bibliography, 

 and an index are included. 



Gophercides, F. T. Shutt (Canada Expt. Farms Rpts. 1916, pp. 173, lH). — 

 This is a report of analyses made of prepared gopher poisons that were found 

 on the market in nortliwestern Canada. Inquiries made among those who have 

 had experience in gopher poisoning indicate that the proprietary preparations 

 are being discarded in favor of home-prepared baits, using strychnine or 

 strychnine sulphate as the poison. 



The wild rats of the Southern States as carriers of Spirochaeta ictero- 

 h88m.orrhagiEe, J. W. Jobling and A. A. Eggstein {Jour. Amcr. j\led. Assoc, 

 69 {1911), No. 21, p. 1787). —Ten per cent of more than 100 rats collected in 

 Nashville, Tenn., harbored S. icterohcemorrhagicc. The rats were obtained 

 from different parts of the city, and so far as could be determined the various 

 localities gave about the same proportion of infected animals. An acc-ount of 

 the occurrence of this spirochete in wild rats by Noguchi has been previously 

 noted (E. S. R., 37, p. 577). 



[Report on entomological work] {Kansas Sta. Rpt. 1916, pp. 15, 16. 18, 19). — 

 Brief statements are made of the status of investigations of the Hessian fly, 

 com ear-worm, fruit insects, grasshoppers, chinch bug egg parasites (in which 

 the average percentage of parasitism during the year was 12.9), climate and 

 injurious insects, etc. 



Entomology (Missouri Sta. Bui. 151 (1917), pp. 38, 35).— Brief statements 

 of the work of the year are made by L. Haseman and K. G. Sullivan of an in- 

 vestigation of the insects injurious to nursery stock in the State; by A. H. 

 HoUinger on the scale insects of Missouri ; and by L. Haseman on injurious 

 insect pests of melon and related crops, on the causes of the periodical out- 

 breaks of insect pests, and on the annual cycle of the Hessian fly in Missouri 

 and its control. 



In control work with the San Jose scale on nursery stock, hydrocyanic acid 

 gas destroyed from 97 to 98 per cent of living scale and a miscible oil dip de- 

 stroyed from 99 to 100 per cent. It is stated that 13 new species of scale in- 

 sects have been found in the State during the year and 9 additional genera 

 recorded. 



[Entomological work] (New Mexico Sta. Rpt. 1917, pp. 23, 24, 26, 27, 51-55, 

 fig. 1). — Brief statements are made of the work of the year with the San 

 Jos6 scale, harlequin cabbage bug, and other injurious insects, including a leaf 

 miner (Agromyza scutellata) which did considerable damage to early potatoes 

 and beans in the spring of 1917. Data relating to life history studies of the 

 codling moth are briefly considered and a spraying calendar for its control on 

 apples and pears for 1917 is presented. 



[Economic insects in Yakima County, Wash.] (Ann. Rpt. Hart. Dept. 

 Yakima County, Wash., 1916, pp. 6-9, 19-25, 88-72, figs. 2).— The accounts here 

 given by De Sellem relate to the occurrence of and control work with the more 

 important pests of horticultural crops during the year (pp. 6-9: codling moth 

 investigations and determination of spray dates (pp. 19-22) ; summary of data 

 on codling moth control for the season of 1916 (pp. 23-25) ; codling moth investi- 

 gations (pp. 38-52) ; codling moth breeding work, season of 1916 (pp. 53-61) ; 

 and nicotin sulphate for codling moth control (pp. 62-72). The Colorado po- 

 tato beetle made its appearance in the Yakima Valley, near Sunnyside, in 1916 

 for the first time and its eradication was attempted. 



" The work during 1915 and 1916 indicates that nicotin sulphate acts as a 

 material check to the work of the codling moth. At the present prices of nico- 

 tin it would not be advisable to substitute nicotin sulphate for arsenate of lead 



