272 



is possible to ascertain the period of activity and rest in insects. It is 

 also suggested that observations made on the behaviour of anaesthe- 

 tised insects should prove of value in investigations on their sense 

 organs. 



Tragardh (I.)- Untersuchungen uber einige schadliche Forstinsekten 

 in Schweden. [Observations on some injurious Forest Insects in 

 SAveden.J -Ze/^srAr. f. anijew. Entom., Berlin, v, no. 1, 1919, 

 pp. 98-104, 8 figs. [Received 19th April 1920.] 



The bulk of the information contained in this paper has been 

 previously noticed [R.A.E., A, vi, 287 ; vii, 422.] 



BoLLE (J.). Die Ermittlung der Wirksamkeit von insektentotenden 

 Mitteln gegen die Nagekafer des verarbeiteten Werkholzes. 



[Tests of the Efficacy of Insecticides on Boring Beetles of worked 

 Timber.] — Zeitschr. f. angew. Entom., Berlin, v, no. 1, 1919, 

 pp. 105-117, 5 figs. ' [Received 19th April 1920.] 



Details of various experiments on Anohium. paniceKni, L., Tenebria 

 molitor, L., and Tineola biseUieUa, Z., are given. The results of these 

 show that, of the gases so far tried, carbon bisulphide is the most 

 effective fumigant against these pests. These insects were used for 

 the experiments, as wood borers could not always be obtained. 

 Against the latter the proportions advocated are about 4| oz. to 35 

 cii. feet with an exposure of 4 days at a temperature over 15° C. [59° 

 F.] The time of exposure must be doubled for lower temperatures, 

 but treatment should not be undertgkeu if the temperature is below 

 10° C. [50° F.]. Experiments are now in progress to test the efficacy 

 of hydrocyanic acid gas for such purposes. 



Zander (E.). Die Bekampfung der Wachsmotten mit Blausaure 

 (CyanwasserstoJR[). [Control of Wax Moths by means of Hydro- 

 cvanic Acid.] -Zeitschr. J. angew. Entom., Berlin, v, no. 1. 1919. 

 pp. 127-128. [Received 19th April 1920.] 



Galleria melhnella, L., and Achroia griseUa, L., caused great damage 

 to honeycombs during 1917, but all stages of these moths were success- 

 fully controlled by fumigation with hydrocyanic acid gas. The 

 advantages of this method over sulphur fumigation are emphasised. 



Stellwaag (F.). Zunahme der Acarinose am Wein in der bayer. 

 Rheinpfalz. [Increase of Mite-infestation on Vines in the 

 Bavarian Rhine Palatinate.] — Zeitschr. f. angew. Entom., Berlin, 

 V, no. 1, 1919, p. 128. [Received 19th April '1920.] 



Attacks on vines due to the mite, Phyllocoptes vitis, have spread 

 considerably during the past few years in the Rhine Palatinate. The 

 remedial measures advocated include spraying with a nicotine and 

 soap solution mixed with a copper-lime spray such as is used against 

 Peronospora. 



