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be reached as to which are the basic problems of research and which 

 are the most promising methods of attack. Co-operation is also 

 essential not only among entomologists and between them and other 

 scientific men, but also with pubhc and private agencies and the general 

 pubhc. Conferences and field meetings would seem to be the best 

 means of promoting co-operation for those workers engaged on similar 

 problems. It is considered that the present opportunities are most 

 promising in this respect. 



Kelly (E. G.). Cooperation of Agricultural Colleges with High 

 Schools and Rural Schools in Economic Entomology. — //. Econ. 

 Ent., Geneva, N.Y., xv, no. 1, February 1922, pp. 54-62. 



The work carried out by the Kansas agricultural college, in co- 

 operation with high schools and rural schools during 1921 is discussed, 

 and the advantages of such co-operation in economic entomology are 

 emphasised. Extension schools for the study of entomology have 

 been organised in fourteen counties in Kansas. The extension 

 entomologist is to attend these schools and give demonstrations in 

 spraying, and illustrated lectures on some of the economic pests. The 

 members of the agricultural class and farmers are to be given delinite 

 entomological work that they may do either as teams or as individuals. 



Hadlev (C. H). Outline and Progress of Work being conducted 

 against the Japanese Beetle, PopUlia japonica. Newm. — //. 



Econ. Ent., Geneva, N. Y., xv, no. 1, February 1922, pp. 62-66. 



During 1921 the work in connection with Popillia japonica, Newm., 

 was carried out mainly along the hues suggested in the previous 

 season [R. A.E., A, x, 43]. During this time the beetle has apparently 

 spread considerably, the infested area at the end of 1921 amounting 

 to about 213 square miles in New Jersey and 57 in Pennsylvania, 

 whereas at the end of 1920 the figures were 92 and 11. There appear 

 to be no isolated infestations remote from the main one, and the 

 spread may therefore be considered to be the natural and normal 

 one of the imported insect in its new environment. It appears that the 

 chances of distribution of the beetle by products other than maize 

 are no greater than by other agencies that it is impossible to control, 

 and the quarantine has therefore been revised and is effective from 

 1st January 1922. This quarantine restricts the movement of sweet 

 maize, lettuce, cabbage, grapes, hay and straw. 



As a result of the biological observations now in progress, it has been 

 found that contrary to previous belief the larvae of P. japonica mav 

 under some conditions become a serious source of injury. Their 

 distribution is not limited to the heavier types of soil, and they may 

 occur in practically any type of soil represented in New Jersey or 

 Pennsylvania that will support vegetation. The damage caused by 

 the adults as a result of their habit of feeding on the foliage of orchard 

 and shade trees is of considerable importance. Under some conditions 

 they may also become important pests of vegetables. Investigations 

 with regard to biological control are progressing favourably. A large 

 number of two species of parasites have been received from Japan, one 

 of which at least will apparently be able to survive the conditions 

 existing in the Riverton district. There is also every possibility that 

 certain parasites of white grubs [Lachnosierna], introduced from Illinois, 

 may become useful factors in the natural control of the Japanese beetle. 



