54 EXPERIMENT STATION RECORD. [Vol. 38 



attracting birds about liomes in the various parts of the United States, especially 

 by providing a food supply and other accessories about the homestead. 



The natural enemies of birds, E. H. Forbush (Mass. Bd. Agr., Econ. Biol. 

 Bui. S (1916), pp. 58, pis. 7, figs. 5). — This is a discussion of the more important 

 natural enemies of birds, particularly in Massachusetts. 



Insect pests in the West Indies in 1916 (Agr. News [Barbados], 16 (1917), 

 No. 392, pp. 188, 139). — This consists of brief notes on the more important in- 

 sects of the year. 



A naturalist in Borneo, R. W. C. Shelfoed, edited by E. B. Poulton (Lon- 

 don: T. Fisher Umoin, Ltd., 1916, pp. XXVII+SSl, pis. 32).— This work in- 

 cludes observations of insects of economic importance. 



How to detect outbreaks of insects and save the grain crops, W. R. Walton 

 (U. &'. Dept. Agr., Farmers' Bui. 835 (1917), pp. 24, figs. i5).— This popular ac- 

 count deals with the Hessian fly, chinch bug, army worm, cutworms, grass- 

 hoppers, white grubs, billbugs, com root aphis, wireworms, etc. 



Some common garden insects, J. Tkoop and P. W. Mason (hidiana Sta. Circ. 

 64 (1917), pp. 15, figs. 9). — A popular summary of information. 



Control of some garden insects, L. B. Smith (Virginia Truck Sta. Bui. 23 

 (1917), pp. 489-506, figs. 9). — A summary of control measures for some of the 

 more common insects attacliing vegetables. 



Entomological notes, B. O. Bubt (Rpt. Cawnpore [India] Agr. Sta., 1916, pp. 

 35-41). — These notes consist of records liept during the cotton-growing season 

 of various bollworms attacldng cotton and bhindi. A table is given showing 

 the relative n\imbers of Earias fabia and E. insulana and the Rhogas parasite. 

 Notes on other cotton pests are included. 



Insects attacking cotton and their enemies, P. Iglesias (Bol. Agr. [Sao 

 Paulo], 17. ser.. No. 12 (1916), pp. 968-998, figs. 35).— A summarized account is 

 given of the more important insects attaclfing cotton in Brazil and their nat- 

 ural enemies, particularly Gasterocercodes gossypii, a weevil which attacks the 

 rootstalks previously described by Pierce (E. S. R., 32, p. 658), and the cotton 

 leaf worm. 



Insects attacking hemp, P. Noel (Btil. Lab. Regional Ent. Agr. [Roxi.cn], No. 

 1 (1917), pp. 11, 12; abs. in Rev. Appl. Ent., Ser. A, 5 (1917), No. 4, p. 159).— 

 A list is given of hemp insects. 



Insect enemies of maize, P. Noel (Bui. Lab. Regional Ent. Agr. [Rouen], No. 

 1 (1917), pp. 6-10; abs. in Rev. Appl. Ent., Ser. A, 5 (1917), No. 4, p. 159).— 

 A list is given of the insect enemies of corn. 



The behavior of some soil insects in gradients of evaporating power of air, 

 carbon dioxid, and ammonia, C. C. Hamilton (Biol. Bui. Mar. Biol. Lab. 

 Woods Hole, 32 (1917), No. 3, pp. 159-182, figs. 5).— This is a report of studies 

 made with a view to determining the behavior of some soil insects in evapora- 

 tion, carbon dioxid, and ammonia gradients under experimental conditions. 



Arsenical residues after spraying, W. C. O'Kane, C. H. Hadley, jr., and 

 W. A. Osgood (New Hampshire Sta. Bui. 183 (1917), pp. 62, figs. 14). — The re- 

 sults of investigations from ^912 to 1916 are here reported. Data on the 

 amounts of arsenical remaining on fruit and vegetables after spraying with 

 arsenate of lead are followed by a discussion of the toxic standards and the 

 possible danger of human poisoning, the results of feeding lead arsenate and 

 white arsenic to guinea pigs, and the effect of jbhe drip from sprayed trees on 

 calves, sheep, and poultry. 



On apples from 10 trees picked at intervals ranging from 5 to 90 days after 

 spraying the residues were as follows : Carefully picked fruit 0.08 to 0.77 mg. ; 

 picked in the ordinary way, 0.02 to 0.5 mg. ; picked with cotton gloves, 0.1 to 



