2G9 



are discussed. Although the results were apparently successful, 

 further and more extensive observations are required to prove the 

 efficacy of this treatment in combating the first and second generations 

 of the vine moths [Clysia ambifju(4la and Polyckrosis hofnma]. 



Teichmann (E.). Die Bekampfung der Wachsmotte {Galleria mel- 



lonella) durch Blausaure. [The Control of Galleria mellonella 



with Hydrocyanic Acid.] — Zeitschr. /. angeiv. Entom., Berlin, iv, 



no. 2, 1918, pp. 287-289. [Received 19th April 1920.] 



A method of treating beehives with hydrocyanic acid gas for the 



extermination of the wax moth, Galleria mellonella, is described. 



Frickhinger (H. W.). Blausaureraucherung im Dienste der Mehl- 



schadlingsbekampfung. ii. Bericht uber eine vereinfachte Methode 



der Muhlenraucherung. [Hydrocyanic Acid Fumigation for 



controlling Meal Moth. ii. Report on a simplified Method 



of Mill Fumigation.] — Zeitschr. f. angetv. Entow., Berlin, iv, no. 2, 



1918, pp. 310-324, 3 figs. [Received 19th April 1920.] 



Further experiments have been made with hydrocyanic acid gas 



fumigation [R.A.E., A, viii, 267] as a means of disinfecting flour 



mills. The mills treated and the fumigator used are described. 



MoLZ (E.). Zur Biologie der Getreideblumenfliege {Hylemyia coarctala. 

 Fall.) — Zeitschr. f. angeiv. Entom., Berlin, iv, no. 2, 1918, pp. 

 325-326. [Received l'9th April 1920.] 

 The author expresses his pleasure at finding that Kleine's obser- 

 vations [R.A.E. , A, viii, 266] on the unimportance of the preceding 

 crop and the condition of the soil as factors influencing infestation by 

 Hylemyia coarctata, confirm those made by himself during 1914 in 

 Saxony. 



Hess (A.). Die Kohlweisslingplage in der Schweiz im Sommer 1917. 



[The White Cabbage Butte I'fly Pest in Switzerland in the Summer 

 of 1917.]- Ze//.§c/if /. angeiv. Entom., Berlin, iv, no. 2, 1918, 

 pp. 332-334. [Received 19th April 1920.] 

 The bulk of the information contained in this paper on Pieris 

 brassicae has been noticed elsewhere [R.A.E. A, vii, 235]. Hand- 

 collection is advocated as the most satisfactory remedial measure. 



Rhumbler (L.). Vorschlag zii einer zweckmassigen Formeldar- 

 stellung der Biologien von Insekten. [Suggestion for a useful 

 Representation of the Life- histories of Insects by means of 

 Symbols.]— Ze^'/.sc^r./. angew. Ento?n., Berlin, iv, no. 3, 1918, pp. 

 335-346. [Received 19th April 1920.] 

 The contents of this paper are indicated by its title. 



Andres (A.). Bekampfung der Kleidermotte {Tineola biselliella) 



durch Blausaure. [Control of Tineola biselliella with Hydrocyanic 



Acid.]— Zeitschr. J. angew. Entom., Berlin, iv, no. 3, 1918, pp. 



366-368. [Received 19th April 1920.] 



Experiments with hydrocyanic acid gas in the control of Tineola 



biselliella have shown that an exposure of 4 hours wuth 1 volume per 



