207 



Flint (W. P.). Control o! Insects injurious to Stored Grain and 

 Seeds. — Illinois Univ. Coll. Agric, Urbana, Extens. Circ. 40, 

 January 1921, 4 pp. [Received 16th February 1922.] 



The most effective measures for controlhng insects in stored grain 

 and seed are discussed ; they include cleanHness, fumigation with 

 hydrocyanic acid gas and carbon bisulphide, and application of heat. 

 The use of lime is recommended against bean and pea Bruchids. 

 Burning sulphur is fairly effective, but must be closely confined in 

 order to penetrate masses of grain. The fumes of formaldehyde are 

 effective as a germicide, but should never be used for killing insects. 



Flint (W. P.). Method of Destroying Grasshoppers. — Illinois State 

 Nat. Hist. Survey, Urbana, Entom. Ser. Circ. 3, revd., February 

 1921, 11 pp., 8 figs. [Received 16th February 1922.] 



The bionomics of grasshoppers in Illinois are briefly recorded ; 

 the remedial measures recommended and described are the use of 

 poisoned baits and of hopperdozers. 



Flint (W. P.). The Corn Root-aphis. — Illinois State Nat. Hist. 

 Survey, Urbana, Entom. Ser. Circ. 4, 1919, 7 pp., 2 plates. 

 [Received 16th February 1922.] 



This popular account of Aphis maidiradicis (corn root aphis) and its 

 relation to the ant, Lasius niger, is similar to one already noticed 

 [R.A.E., A, vii, 67]. 



Flint (W. P.). Chinch-bug Barriers. — Illinois State Nat. Hist. 

 Survev, Urbana, Entom. Ser. Circ. 5, rev. edn., April 1921, 9 pp., 

 4 figs^. [Received 16th February 1922.] 



The use of the various barriers and the spray formula recommended 

 in this paper for the control of the chinch bug [Blissus leucopterus] have 

 already been noticed from other sources. 



Flint (W. P.) & Malloch (J. R.). The European Corn Borer.— 



Illinois State Nat. Hist. Survev, Urbana, Entom. Ser. Circ. 6, 

 1920, 7 pp., 6 figs. [Received 16th February 1922.] 



The bulk of the information contained in this paper on the damage 

 to maize by Pyrausta nubilalis (European corn borer) and the distin- 

 guishing characters of the smartweed borer, P. ainsliei {obumbratilis) , 

 has already been noticed [R.A.E., A, viii, 450]. 



Though P. nubilalis hdiS not yet been found in Illinois, it has recently 

 occurred near the northern border of Ohio. 



Flint (W. P.). The Army-worm. — Illinois State Nat. Hist. Survey, 

 Urbana, Entom. Ser. Circ. 7, 1920, 9 pp., 4 figs. [Received 16th 

 February 1922.] 



A brief account is given of the life-history, habits and control of 

 Cirphis unipuncta (army worm) in Illinois. There are three generations 

 a year in the southern two-thirds of the State, and probably throughout 

 the whole. The larvae of the first generation cause the most damage 

 and appear from the 20th-30th May in the south, from lst-15th June 

 in the centre and from 15th-30th June in the north. Pupation occurs 

 in the south from the middle of March to the beginning of April, and 



