43 



Hadley (C. H.). The Status of the Work against the Japanese Beetle. 



—Jl. Econ. Ent., Geneva, N.Y., xiv, no. 3, June 1921, pp. 249- 



253. [Received 22nd November 1921.] 

 During the past two seasons the p>lans suggested in a previous 

 paper on the Japanese beetle, Popillia japonica, Newm. [R.A.E., 

 A, viii, 307, 374], have been closely followed. The work has now 

 been reorganised on an experimental basis. The importation, breeding 

 and dissemination of parasites, as well as quarantine measures to delay 

 and hinder the spread of the pest, are included. The beetle has 

 spread to such an extent through artificial agencies that further 

 barrier-band work is considered impr9,cticable. 



SwEZEY (O. H.). Some recent Insect Immigrants in the Hawaiian 

 Islands. — //. Econ. Ent., Geneva, N.Y., xiv, no. 3, June 1921, 

 pp. 254-258. [Received 22nd November 1921.] 



This list of insect immigrants noticed in 1919 and 1920 is arranged 

 under the orders and comprises 9 Hymenoptera, 6 Diptera, 6 Coleoptera, 

 3 Homoptera, 1 Orthopteron and 1 Neuropteron. Notes are given 

 as to the distribution, habits and importance of these. They include 

 the Tahiti coconut weevil, Diocalandra (Calandra) iaitensis. 



Larrimer (W. H.). U.S. Bur. Ent. Grasshopper and Cricket 

 Repellents. — //. Econ. Ent., Geneva, N. Y., xiv, no. 3, June 1921, 

 pp. 259-263. [Received 22nd November 1921.] 



For several years farmers in widely separated localities in North 

 America have had trouble as a result of grasshoppers and crickets 

 cutting the bands of the sheaves of corn in the field, and previous 

 records of this are quoted. Experiments have been recently under- 

 taken to ascertain a suitable repellent mixture to prevent this damage. 

 Small quantities of wheat bran were mixed with a variety of substances, 

 of which copper sulphate and kerosene gave by far the most promising 

 results as repellents. Soap was distinctly attractive, and was after- 

 wards shown to improve both the attractiveness and mechanical 

 condition of poison mash. Melanoplus femiir-riibnim was by far the 

 most numerous of the grasshoppers present in this experiment. 



Headlee (T. J.). The Response of the Bean Weevil to Different 

 Percentages of Atmospheric Moisture. — //. Econ. Ent., Geneva, 

 N.Y., xiv, no 3, June 1921, pp. 264-268. [Received 22nd 

 November 1921.] 



In the experiments described, which are supplementary to those 

 previously recorded [R.A.E., A, v, 205], on the response of Bruchus 

 obiectus to varying degrees of atmospheric moisture ranging from 

 less than 1 per cent, to approximately 100 per cent., use was made 

 of the varying amount of moisture given off by saturated aqueous 

 solutions of various salts, lithium chloride giving 7-1 per cent, 

 atmospheric moisture, calcium chloride 25-9 per cent., sodium 

 hydroxide 30-7 per cent., aluminium chloride 37 per cent., copper 

 nitrate 45-7 per cent., sodium bromide 56-1 per cent., sodium chloride 

 73-4 per cent., sodium nitrate 80 per cent., and potassium sulphate 

 89-7 per cent. The air as it came from the concentrated sulphuric 

 acid drier contained less than 1 per cent, of atmospheric moisture, 

 and that passed through distilled water contained approximately 



