EXPERIMENT STATION RECORD. 355 



ECONOMIC ZOOLOGY— ENTOMOLOGY. 



The relation of rodent plague to human Infection, W. C. Ruckeb (Jour. 

 Amer. Med. Assoc, 65 (1915), No. 21, pp. i767-i765).— A review of the subject 

 with references to the literature. 



A plague-like disease of California ground squirrels affecting man in 

 Ohio, W. B. Wherry (Jour. Amer. Med. Assoc., 65 (1915), No. 18, pp. 15J,9, 

 1550). — This paper relates to investigations previously noted (E. S. 11., 33, 

 p. 4.50). 



The author calls attention to recent experiments of N. E. Wayson showing 

 that in addition to squirrel fleas (Ccratophyllus acutus), reported by McCoy 

 and Chapin to be transmitters of tiie virus (E. S. R., 26, p. 461), the house fly 

 and stable fly may transmit the virus shortly after feeding on an infected 

 animal. In a discussion of the subject which follows (pp. 1549, 1550), N. B. 

 Wayson reports having duplicated McCoy's methods of flea transmission of the 

 di.sease without as successful results. AVhen the stable fly was allowed to bite 

 the infected animal and then transferred to a normal animal the results were 

 successful in a small percentage of cases. House flies which were allowed to 

 feed on and crawl over infected viscera and then over a cocainized eye yielded 

 nearly 100 per cent of " takes." This method was positive in transmission 

 even with a 24-hour interval between the exposure to the infection and to the 

 normal eye. The discussion was also entered into by G. W. McCoy, N. Barlow, 

 and the author. 



Two years' investigations in Peru of verruga and its insect transmission, 

 C. H. T. TowNSEND (A))ier. Jour. Trop. Diseases and Prev. Med., 3 (1015), No. 

 1. pp. 16-32, pis. 2). — This is a summarized account of investigalions carried 

 on by the author, accounts of which have been previously noted from other 

 sources (E. S. R., 32, pp. 248, 350). 



The establishment of foreign insects in spite of inspection, H. B. Weiss 

 iCanad. Ent., 1ft (1915), No. 10, pp. 313-315).— It is pointed out that in spite of 

 inspection a number of insects have been introduced into New Jersey at 

 Rutherford, where two large nurseries are located and where there were re- 

 ceived during the spring of 1914 3,744 cases of imported nursery stock, during 

 the following fall 1,765. and during the spring of 1915 2,191 cases. Among the 

 species which have recently become established are Phytomyza aquifolii, found 

 mining the leaves of English holly; the European pine shoot moth (Evetria 

 huoliana) in Pinus mxighus growing in the nursery; Agrilis viridis fagi infest- 

 ing rose stems and doing considerable damage in this and other sections of the 

 State; Aspidiotus tsugw taken in considerable numbers on Japanese hemlock; 

 Myelophilus piniperda, which does extensive damage to pine trees in Europe, 

 found on P. sylvestris; and Pseudococcus sp., from Japan, found to damage 

 Taxus sp. 



Insect importations into New Jersey during the spring of 1915, H. B, 

 Weiss (Canad. Ent., 47 (1915), No. 10, pp. 326-328) .—The author presents a 

 list of insects imported on nursery stock from various countries in Europe 

 during the spring of 1915. 



[Use of quassiin as an insecticide in Russia], A. V. Zeidel (Otchet Dieia- 

 teln. Kiev. Obshch. Selsk. Khoz. i Selsk. Khoz. Promyshch., 1913, p. 106; abs. in 

 Rev. Appl. Ent., S (1915), Ser. A, No. 2, p. 104). — Quassiia was found to be one 

 of the most effective insecticides used against Hyponomeuta malineUus. 



The mouth parts of the Thysanoptera and the relation of thrips to the 

 nonsetting of certain fruits and seeds, A. D. Borden (Jour. Econ. Ent., 8 

 (1915), No. 3, pp. 354-360, figs. 9).— Anatomical studies of the Thysanoptera 

 and observations of their feeding habits are reported. 

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