ECONOMIC ZOOLOGY ENTOMOLOGY. 755 



'- Liine-sulphur is a special rntlier thau a general contact insecticide. Its 

 strong, persistent reducing power, and its ability to soften the wax about tlie 

 margin of a scale insect like the San Jose scale are the imiwrtant properties 

 tliat make it efficient as a scaleciile." 



Concerning- the action of potassium tellurate as a fly repellent, A. Mayer 

 (Mondtsh. Prakt. Tierheilk., .i.i (1911), No. 2-3, pp. 49-59).— The action of 

 kalium telluricum as a repellent for mosquitoes, flies, ticks, etc., when admin- 

 istered to domestic animals internally, as reported by Ochmann," led the 

 author to conduct the investigations here presentetl. 



Tests were made on 9 horses and a cow by admrnistering 10 gm. in doses of 

 from 1 to 5 gm. in their drinking water. Negative results were obtained, the 

 exiierimental animals continuing to be annoyed by flies. Experiments with 

 oleum lauri show it to be a good insectifuge. 



The existence of Schizotrypanum cnizi, Chagas, 1909, in Bahia (Matta de 

 Sao Joao). Biology of Conorhinus megistus, E. Brumpt and Piraja da Silva 

 (Bui. Soc. Path. Exot., 5 (1912), No. 1, pp. 22-26, pg. i).— The occurrence of ,^. 

 vruzi at IMatta de Sao Joao, Bahia, situated about 800 km. from the point at 

 which it was discovered by Chagas (E. S. R., 23, p. 585) is recorded, and notes 

 are given on the life history and habits of C megistus, the reduviid through 

 which it is transmitted. 



American Psyllidae, V, D. L. Crawford (Pomona Col. Jour. Ent., 3 (1911), 

 No. .'f, pp. 628-632, fig. I). — This paper, continuing previous work (E. S. R., 26, 

 p. 148) includes descriptions of 4 species and 1 variety of psyllids new to 

 science. 



Natural enemies of the citrus plant lice, E. O. Essig (Pomona Col. .Jour. Ent., 

 S (1911), No. 4, pp. 604-616, figs. 10). — The insect enemies of citrus plant lice 

 here considered are Chrysopa californica, lady beetles (Coccinella calif ornica, 

 Hippodamia convergens, Coccinella abdoniinalis, and Hcymnus sordidus), syr- 

 phids (Lasiopfitliicus pyrastri and ^yrphus aniericanus), and the 2 internal 

 parasites Aphidius trstacelpes and Charips xanthopsia. 



Aphididae of southern California. VIII, E. O. Essig (Pomona Col. Jour. Ent., 

 S (1911), No. .'/, pp. 586-603, figs. 6). — This contribution continues previous ar- 

 ticles (E. S. R., 26, p. 149), and deals with all the commonly injurious plant 

 lice of citrus in southern California, namely. Aphis cookU n. sp., A. gossypii, 

 Macrosiphum citrifolii, the green peach aphis (Myzus persicw), and the citrus 

 aphis (Toxoptera aurantiiv). 



Systematically eradicating the white fly in Texas, E. R. Kone (Gulf Coast 

 Citrus Fruit Grower, 1 (1911), No. .), p. 18). — A brief account of eradication 

 work in Texas. It is stated that the freeze of January 2 and 3 defoliated all of 

 the citrus fruit trees, thus confining white flies almost exclusively to other host 

 plants, especially the cape jessamine. 



The white flies of Japan, S. I. Kuwana (Pomona Col. Jour. Ent., 3 (1911), 

 No. 4, pp. 620-627, figs. 2). — This paper deals with 11 species of Japanese 

 Aleyrodidte, of which 3 have been previously recorded and 8 are new to science. 



Treatment for the San Jose scale and terrapin scale insects, T. B. Symons, 

 E. N. Cory, and O. G. Babcock (Maryland Sta. Bui. 161, pp. 221-234, figs. 3).— 

 This bulletin reports the results of experiments conducted during the season 

 of 1910-11, the first part (pp. 222-227) dealing with the San Jose scale, and 

 the second (pp. 227-231) with the terrapin scale. 



The authors' observations and experiments show that there is little, if any, 

 difference in the effectiveness of control work with the San Jose scale, whether 

 done in the fall or spring. The exi^eriments and observations in 1910-11 



«Ztschr. Veteriniirk., 23 (1911), No. 4, pp. 193-195. 

 42049°— No. 8—12 5 



