1910] ECONOMIC ZOOLOGY ENTOMOLOGY. 551 



Liquid hydrocyanic gas for fumigation (Cat. Cult., 53 {1919), No. 1, p. 3, fig. 

 i).— This brief account inchides a dosage schedule table for citrus tree fumiga- 

 tion with liquid hydrocyanic acid 95 to 98 per cent pure, prepared by R. S. 

 Wogluni of the Bureau of Entomology of the U. S. Department of Agriculture. 



The treatment of cloth, to prevent mildew, A. W. MoRRrcL and W. W. 

 YoTHEES {Pror. Fki. State Hort. Soc, 31 {1918), pp. 8i-85).— This is a report of 

 experiments in Florida conducted by the authors on mildew proofing canvas 

 during the summer and fall of 1908. 



Considering the cost and efficiency, the authors recommend the use of any 

 of 3 of the 13 solutions tested, namely (1) sal soda 7.5 lbs., tartaric acid 15 oz., 

 and zinc sulphate 7.5 lbs.; (2) copper sulphate 7.5 lbs. and sal soda 7.5 lbs.; 

 and (3) copper sulphate 7.5 lbs., sal soda 7.5 lbs., and tartaric acid 15 oz., 

 each being sufiicient to make 300 gal. 



The care of spraying machinery, W. W. Yothers {Pwc. Fla. State Hort. 

 Soc., 31 {1918), pp. 11-80). 



Two new genera and thirteen new species of Australian Thysanoptera, 

 J. D. Hood {Proc. Biol. Soc. Wash., 32 {1919), pp. 75-92).— The genera erected 

 are Asemothrips and Teuchothrips. 



Some plant bugs that infest citrus trees, W. W. Froggatt {Agr. Gas. N. S. 

 Wales, 30 {1919), No. 5, pp. 325-330, figs. 2). — ^Notes are presented on the natural 

 food plants and life histories of several of the plant bugs infesting citrus trees 

 in Australia, including the green-spined orange bug {Biprorulus hihax), the 

 painted Capparis bug {Stenozygum personatum) , and the painted horehound 

 bug {Agonoscelis mtila). 



The genus Phatnoma, E. H. Gibson {Trans. Amer. Ent. Soc, 45 {1919), No. 2, 

 pp. 181-185). — Seven species of this tingid genus, which is of little economic 

 importance, are recognized, of which two are described as new. 



The genera Corythaica Stal and Dolichocysta Champion (Tingidae: Heterop- 

 tera), E. H. Gibson {Proc. Biol. Soc. Wash., 32 {1919), pp. 91-104). 



Notes on the North American species of Corizus, B. H. Gibson {Canad. 

 Ent., 51 {1919), No. 4, pp. 89-92). — This account includes a key for the identifi- 

 cation of the species, of which 12 are recognized. 



Cicadula sexnotata, a hemipteran injurious to wheat, oats, and barley in 

 Sweden, T. Ellinger {Vort. Landbrug, 31 {1918), No. 40, pp. 453, 454; abs. in 

 Internat. Inst. Agr. [Rome's, Internat. Rev. Sci. and Pract. Agr., 9 {1918), No. 

 11, p. 1383). — This pest caused serious damage to wheat in the Province of 

 Ostergotland, and spread into southern Sweden as far as Scania during the 

 summer of 1918. 



Third contribution to the knowledge of Italian Coccidae, G. Leonaedi {Bol. 

 Lab. Zool. Gen. e Agr. R. Scnola Sup. Agr. Portici, 12 {1911), pp. 188-216, figs. 

 13). — This paper describes 25 species, of which 6 are new to science. 



An interesting reaction to louse biles, W. Moore {Jour. Amer. Med. Assoc, 

 11 {1918), No. 18, pp. 1481, 1482). — In this contribution from the Minnesota 

 Experiment Station the author presents evidence to show that the clothes 

 louse (Pediculus humanus [vcstimenti]) , if present in large numbers, may 

 produce an illness by a toxin introduced at the time of feeding. It is sug- 

 gested that some of the symptoms of trench fever encountered in certain cases 

 may not be due to the organism of trench fever but to certain toxins intro- 

 duced by the lice. 



Clinical studies on the effects of louse bites, Pediculus corporis, A. D. 

 HiRSCHFELDER and W. MooKE {Arch. Int. Med., 23 {1919), No. 4, pp. 419-430, 

 figs. 4)- — In continuation of the investigations by Moore above noted, the 

 authors record observations which indicate more strongly the presence of a 



