ECONOMIC ZOOLOGY — ENTOMOLOGY. 61 



phur compounds gave fairly satisfactory control of the San Jos§ scale, in some 

 instances equaling lime-sulphur solution. They may readily be prepared at 

 home without the use of heat." 



'• The following arsenical compounds were also tested at the laboratory : 

 Arsenic sulphid. arsenic tersulphid. and arsenic triosid. These materials are 

 destructive to leaf tissue, and therefore undesirable insecticides. Several com- 

 pounds containing no arsenic were tested, namely, barium chlorid, barium sul- 

 phate, calcium chlorid, copper osid, lead acetate, lead carbonate, lead chromate, 

 lead oxid, lead peroxid, mercury bichlorid, zinc chlorid, zinc oxid, and zinc 

 sulphate. While some of these compounds gave more or less satisfactory results, 

 they were not of sufficient promise to warrant further testing." 



The insecticidal properties of various sulphids and polysulphids, P. J. 

 Parkott and W. J. Schoexe (Jour. Econ. Ent., S (1915), So. 2, pp. 204, 205). — 

 This is an abstract of a paper presented by the authors before the American 

 Association of Economic Entomologists in December, 1914. 



'• The amount of sulphur in proprietary insecticides containing sulphids and 

 polysulphids of the different bases varies greatly, ranging for the sodium prepa- 

 rations from 1.79 to 58.92 per cent ; potassium, 2.39 to 38.72 per cent ; calcium, 

 3.97 to 26.4 per cent ; and barium, 16.54 to 44 per cent. . . . The work in general 

 so far points to the conclusion that the strength of a preparation with regard to 

 its sulphur content is a more important consideration than the natui'e of the 

 base of the sulphids and polysulphids." 



A new contact insecticide, W. M. Scott (Jour. Econ. Ent., S (1915), Xo. 2, 

 pp. 206-211). — This article relates to barium sulphur, accounts of which by the 

 author have been previously noted (E. S. R., 33, pp. 339, 340). The author has 

 found dry barium sulphur to be as effective as lime-sulphur solution in the 

 control of San Jos^ and oyster-shell scales. 



The nicotin sulphate-Bordeaux combination, V, I. Safko (Jour. Econ. Ent., 

 S (1915), Xo. 2, pp. 199-20S) .—The author's results and the work recorded by 

 others indicate that nicotin sulphate may be safely added to and applied with 

 Bordeaux in all cases where Bordeaux alone may be safely used. 



Further data on poisoned bran mashi flavored with, fruit juice as a means 

 of controlling' some insects, G. A. Dean {Jour. Econ. Ent., S (1915), Xo. 2, pp. 

 219-^27). — This is a report of work with the Kansas bait, carried on in con- 

 tinuation of that previously noted (E. S. R., 31. p. 249). 



Grasshopper control in New York State, E. P. Felt (Jour. Econ. Ent., 8 

 (1915), Xo. 2, pp. 221-230). — The author reports that the use of the Kansas 

 bait in a grasshopper outbreak in areas bordering the Adirondacks and extend- 

 ing from Poland, Herkimer County, through Fulton and Saratoga counties 

 north to Warren and Clinton counties, gave excellent results. 



The mole cricket (Gryllotalpa vulgaris) damaging rice fields in Italy, 

 N. NovKT.T.T (Gior. Risicolt., 4 (1914), Xo. 13, pp. 1S9-193; abs. in Internat. Inst. 

 Agr. [Rome], ilo. Bid. Agr. Intel, and Plant Diseases, 5 (1914), Xo. 10, pp. 

 13S1, 13S2). — The author reports that the mole cricket is increasing in certain 

 irrigated rice-growing districts in Italy, where it is the source of considerable 

 damage. Wheat, oats, and barley have been badly thinned and corn so re- 

 duced as to require reseeding. 



Podisma frigida in Alaska, A. X. Caudeix (Canad. Ent., ^7 (1915), Xo. 5, 

 p. 160). 



Descriptions of new American Thysanoptera, J. D. Hood (Insccutor Inscitiw 

 llcnstruus, 3 (1915), Xo. 1-4, pp. 1-40, pis. 2). — A new genus (Ommatothrips) 

 and 20 species of thrips are here described as new, 12 being from the United 

 States, 3 from Panama, 4 from Peru, and 1 from Porto Rico. 



