528 



the seasonal incidence of the larvae throughout the summer, and conse- 

 quently to fix the best dates for spraying ; this could only be accom- 

 plished by a competent entomologist working in the field throughout 

 the summer. The insect cannot be satisfactorily controlled in Colorado 

 by means of a calyx spray and one or two cover sprays. Burlap 

 bands properly apphed and attended to are a very important aid, 

 and should lessen the numbers of the late generation by 30 or 40 

 per cent.1 



Maheux (G.). Report of the Provincial Entomologist. — Rep. Minist. 

 Agric, Quebec, 1919, pp. 109-114. [Received 11th October 1920.] 



With the exception of Aphis pomi (apple aphis) the number of insect 

 pests during the year was Hmited, and the majority of these have 

 been already noticed [R.A.E., A, viii, 2]. Although generally well 

 represented, Leptinotarsa decemlineata (potato beetle) showed a decrease 

 from 1917, while Cydia (Carpocapsa) pomonella (codhng moth) also did 

 less damage than in the past. Agrilus anxius (bronze birch borer) con- 

 tinued to do damage. Attacked trees die within one or two years, 

 and on the north side of the Ottawa River an entire stand of white 

 birch {Betula alba) was found to have been invaded by the beetle, 

 which had so far confined itself to cities and inhabited centres. 



Quebec is now a port of entry for the importation of plants subject 

 to the Federal Act respecting insects and pests, and consequently 

 several parcels from France, England and HoUand have been inspected. 



Plum Aphides. — Ministry Agric. & Fish., London, Leaflet 308, April 

 1918, 6 pp., 2 figs. [Received 12th October 1920.] 



The contents of this revised leaflet on Aphis pruni, Reaum., Hyalop- 

 terus pruni, F., and Phorodon humuli, Schr., are almost identical 

 with those of a paper already noticed [R.A.E., A, iv, 532] ; but in 

 the spray formulae it is recommended that lime wash should be made 

 of 10-15 lb. quick lime to 10 gal. water, instead of 10-20 lb. to the same 

 quantity of water. 



Roberts (J. A.). Annual Report of the Commissioner of Agriculture. 



— 18th Ann. Rept. Maine Commiss. Agric, Augusta 1919, pp. 7- 

 24. [Received 12th October 1920.] 



To protect the State of Maine from the introduction and dissem- 

 ination of the European corn borer {Pyrausta tiubilalis), regnlationn 

 have been issued by the Crop Pest Commission of Maine requiring 

 that every person or corporation receiving any maize or other vegeta- 

 tion from any area in the United States outside the State of Maine 

 which now is or hereafter may be quarantined, shall return it to its 

 place of origin or destroy it, unless in the judgment of the Commissioner 

 of Agriculture it may be disinfected in such a manner and under such 

 supervision as he may direct. Inspectors are to be appointed to 

 watch for the appearance of the moth and to notify and warn aU 

 persons or corporations receiving material from quarantined areas 

 to comply with the above regulations. 



