428 



Heymoxs (R.)- Die Bekampfung der Muhlenschadlinge. [The 

 Control of Flour Mill Pests.] — Verh. Deutsch'en Ges. angew. Entom., 

 II. Mitgliederversammlung, Munich, 24-26 September 1918; 

 Berliu, 1919, pp. 34-51. [Received 28th July 1920.] 



The method of combating Ephestia kiihniella, Z., by fumigation 

 with hydrocyanic acid gas is here dealt with. This moth was intro- 

 duced from America sometime about 1870. and the losses it causes in 

 Germany annually are said to amount to £25,000-£50,000. Fumiga- 

 tion has proved quite efficacious, but the cost of thig process is against 

 it at present in the case of most mills. The cost for a mill of 2,000 

 cu. metres is at least £32 \0s., and for 6,000 cu. metres, over £60. 



Frickhinger (H. W.). Organisation der Bekampfung der Muhlen- 

 schadlinge. [The Organisation of Measures against Flour Mill 

 Pests.] — Verh. Deutschen Ges. angew. Entom., II. Mitgliederver- 

 sammlung, Munich, 24-26 September 1918 ; Berlin, 1919, pp. 

 52-61. [Received 28th July 1920.] 



The technical organisation for combating pests that was foimded 

 in 1917 and attached to the Prussian Ministry of War is described. 

 The Staff has been enlarged as the demand for its services increased in 

 northern and central German States. A similar body has also been 

 formed in Bavaria, the scientific part of the work bemg entrusted to 

 the Zoological Department of the Bavarian Forest Research Institute. 



This work of combating flour-mill pests has proved one of the first 

 great successes of applied entomology in Germany, and has materially 

 contributed to the recognition of its value to the country. 



Flury (F.). Die Tatigkeit des Kaiser Wilhelm Instituts fiir physi- 

 kalische Chemie und Elektrochemie in Berlin-Dahlem in Dienste 

 der Schadlingsbekampfung. [The Work done in the Service of 

 Insect Pest Control by the Kaiser William Institute for 

 Physical Chemistry and Electro-chemistry.] — Verh. Deutschen Ges. 

 angeiv. Entom., II. Mitgliederversammlung, Munich, 24-26 

 September 1918 ; Berlin, 1919, pp. 61-75. [Received 28th July 

 1920.] 



During the War this institute was attached to the Prussian War 

 Ministry and worked out problems connected with insect pest control, 

 including analytical work relating to fumigation with hydrocyanic 

 acid. An instnmient constructed by Prof. Wieland enables the exact 

 strength of gas used to be determined. It also proved of value in 

 experiments made with sulphurous acid in the treatment of horse 

 mange, an effective method of treatment being arrived at. 



FuLMEK (L.). Zur Arsenfrage im Pflanzenschutzdienst. [The Use of 

 Arsenic in Plant Protection Work.] — Verh. Deutschen Ges. angew. 

 Entom., II. Mitgliederversammlung, Munich. 24-26 Septeinher 

 1918 ; Berlin, 1919, pp. 75-88. [Received 28th July 1920.] 



This paper re\'iews the properties and apj)lications of the arsenic 

 compounds most widely used against insect pests of plants. It was 

 prepared in the view of their increasing popularity in spite of restrictive 

 legislation and because the War had reduced the supplies of car- 

 bolineum, nicotine, soap, petroleum and other insecticides. 



