1917] ECONOMIC ZOOLOGY ENTOMOLOGY. 57 



of the eggs have hatched, or ahout the end of the first week in July. The fol- 

 lowing formula to make 200 gal. of the 40 per cent nicotin sulphate spray is 

 recommended : Dissolve 8 lbs. of fish-oil soap in a small amount of water, add 

 the dissolved soap to nearly the required amount of water in the spray tank, 

 and then add 1 qt. of nicotin sulphate diluted with the remainder of tlie water. 



Life cycle of Tortrix viridana, A. SiCH {Proc. So. London Ent. and Nat. 

 Hist. Soc, 1915-16, pp. 15-20). — The studies here reported relate to a leaf 

 loller enemy of the oak in England. 



[Codling moth investigations] {Neto Mexico Sta. Rpt. 1916, pp. S1-S4). — 

 This is a brief report of results of observations of the life history and habits 

 of this pest In New Mexico, together with codling moth spraying schedules for 

 1916. 



Spraying for codling moth, C. C. Vincent, W. C. Edmundson, G. J. Down- 

 ing, and E. P. Taylor {Idaho Sta. Bui. 92 (1916), pp. 25-27).— This is a brief 

 report of progress on spraying work with the codling moth commenced three 

 years ago with a view to determining the relative efficiency of one, two, and 

 three applications of arsenate of lead and for the purpose of comparing the 

 efficiency in the control of the codling moth of two well-known brands of pow- 

 dered arsenate of lead. The results obtained from spraying for three years are 

 reported in tabular form. It is believed that either bi-and of material properly 

 applied will prove satisfactory. 



"The first or calyx spray should be applied when from 80 to 90 per cent of 

 the petals have fallen, or work should begin in time to complete the first spray 

 before the calyx lobes have closed. . . . The second spray should be applied 

 about three weeks after the first. ... To determine the time for the applica- 

 tion of a third spray the trees should be banded about the middle of June. The 

 spray should be given 20 days after the first larvae come down under the bands. 

 Trap or breeding cages may also be employed to determine the exact time for 

 the application of the third spray. It should be applied when the first moths 

 appear. 



" The number of applications will depend on the infestation the previous year, 

 the variety of the fruit, the infestation in neighboring orchards, effectiveness of 

 early sprays, and seasonal conditions. The early calyx spray, however, is the 

 most important. If this and other early brood sprays are neglected or im- 

 properly applied when the worms are bad, no amount of spraying late in the 

 season will save the crop." 



Life history of some Japanese Lepidoptera containing new genera and 

 species, K. Nagano {Did. Nawa Ent. Lab. [Japan] No. 1 {1916), pp. 21-\-\.102\, 

 pis. 9). — This bulletin gives descriptions of the immature stages of 31 species 

 of Lepidoptera, together with colored illustrations of the larvae and drawings 

 illustrating the structure of the several stages. Three genera are erected and 

 one species and one variety described as new to science. 



District of Columbia Diptera: Syrphidse, N. Banks, C T. Greene, AV. L. 

 McAtee, and R. C. Shannon {Proc. Biol. Soc. Wash., 29 {1916), pp. 173-203).— 

 One hundred and thirty-six species and two varieties are recorded from the 

 District of Columbia. 



The relation of malaria to crop production, D. L. Van Dine {Sci. Mo., 3 

 {1916), No. 5, pp. 431-439, figs. 2). — This paper is based upon investigations 

 conducted since 1913 by the Bureau of Entomology of the U. S. "Department of 

 Agriculture in the South, particularly in Madison Parish, La., a report of which 

 work has been previously noted (E. S. R., 33, p. 255), together with data ob- 

 tained from the Office of Farm Management of the Department. 



Mosquitoes and man again, C. S. Ludlow {Science, n. ser., 44 {1916), No. 

 1144^ PP- 788-790). — A contiauation of the discussion previously noted (E. S. 

 R., 36, p. 552). 



