354 



volumes gas to ensure at least 05 per cent, being present. Unsheltered 

 weevils were then killed in 15 hours, but those covered by a layer 

 of grain, 10 inches or more in thickness, were more or less protected 

 from the effects of the gas. As the majority of individuals are found 

 at some depth or even within the grains of wheat, this fumigant is not 

 of practical value in combating C. granmia. 



Oberstein (— .). Ueber das Auftreten von Thersilochus morionellus, 

 Holmgren, als natlirlicher Feind des Rapsglanzkafers {Meligethes 

 aeneus, F.) in Schlesien. [The Occurrence of Thersilochus 

 morionellus as a Natural Enemy of Meligethes aeneus in Silesia.] — 

 Centralbl. Bakt., Parasit. u. Infektionskr. IP^ Abt, Jena, xlix, no. 

 1-4, 22nd January 1919, pp. 91-92. 



In the spring of 1918 a field of rape in Silesia was very severely 

 infested by a beetle, Meligethes aeneus, F. , both the adults and larvae 

 causing injury. An Ichneumonid parasite, Thersilochus morionellus, 

 Holmgr., was also observed. This is the first record from Silesia of 

 the occurrence of this beetle in a field of rape, which is remarkable, 

 in view of the fact that in 1913 the Province produced one-quarter of 

 the Prussian rape crop. 



Enders (H. E.). Dwarfing Effect of Attacks of Mites of the Genus 

 Eriophyes upon Norway Maples. — Proc. Indiana Acad. Sai., Fort 

 Wayne, 1917, pp. 79-84, 4 figs. 



Great numbers of a mite, a species of Eriophyes, infest maple leaves 

 in Pennsylvania and are believed to be the cause of stunted growth. 

 The infestation is spread over very large areas, indicating that the mite- 

 is probably distributed by birds. 



As a remedial measure spraying the trees in winter with kerosene- 

 emulsion diluted with 5 to 7 parts of water is suggested, since it is. 

 probable that the mites hibernate in the buds. 



Allan (C. W.). Life History of the Antheraea roylei (Oak Emperor) 

 Moth. — Jl. Bombay Nat. Hist. Soc, Bombay, xxvi, no. 1, 20th 

 December 1918, pp. 300-301. 



As Antheraea roylei has three generations in the year and the cater- 

 pillars are easily reared in captivity, their food consisting of oak 

 {Quercus semiserrata), it is suggested that this species might be valuable- 

 in sericulture, the silk produced being of good quality. 



McLaine (L. S.). The European Corn Borer, Pyrausta nubilalis, Hbn. r 

 a new and most dangerous Pest. — Agric. Gaz. Catiada, Ottawa, vi, 

 no. 5, May 1919, pp. 443-446, 3 figs. 



In view of the recent outbreaks of Pyrausta nubilalis in the United 

 States a general account of this moth is given, and a warning against 

 its possible introduction into Canada is issued. 



