265 



described. The remedial measures advocated are fumigation with 

 carbon bisulphide, after which the wood should be impregnated with 

 an alcoholic solution of 3 per cent, corrosive subhinate followed by 

 j)etroleum to prevent re infestation. 



Maas(0.). Bemerkungen zur Einfuhrung der Seidenzucht in Deutsch- 

 land nach eigenen Erfahrungen uber die Biologie des Seiden- 

 spinners. [Remarks on . the Introduction of Sericulture into 

 Germany as a result of personal Experiences with regard to the 

 Biology of the Silkworm.] — Zeitschr.f. anqeir. Enlo»i., Berlin, iii, 

 no. 1, 1916. pp. 180-194. [Received 19th April 1920.] 



This is one of a series of papers by various authors dealing with the 

 prospects of sericulture as an industrial proposition in Germany. The 

 question is dealt with from the economic as well as the bionomic point 

 of view. Owing to various circumstances, such as climatic conditions 

 and the necessity of finding substitutes for the normal silkworm diet, 

 the idtimate success of the project under present conditions is con- 

 sidered doubtful, though not impossible. 



PusTER (— ). Maikafer-Okonomie und Waldwirtschaft. [Cockchafer 

 Control and Forestry.] — Zeiischr. f. angew. Entomologie, Berlin. 

 iii, no. 2, 1916, pp. 196-203. [Received 19th April 1920.] 



Observations made in the Upper Palatinate show that cultivation 

 should be carried out during the flight period of cockchafers {Melo- 

 lontJia] so that the roots are stronger and more able to resist attack 

 by the time the larvae commence their work of destruction. 



The author does not consider that the formation or condition of the 

 soil has any influence on the choice of place for oviposition, as eggs may 

 be laid in ground where larval development is quite impossible. 

 Permanently shaded forests impede the development of the larva by 

 depriving them of the required warmth. For this reason clearing 

 should always have a northern or north-western aspect in preference 

 to a southern one. The best means of preventing infestation is to lay 

 (Hit nurseries as far as possible from the danger zone. 



Wolff (M.). Uber das neue (zweite) zoologische Laboratorium der 

 Kgl. Forstakademie in Eberswalde. [The new (second) Zoological 

 Laboratory of the Royal i\.cademy of Forestry at Eberswalde.] — 

 Zeitschr. f. anrfew. Enfom., Berlin, iii, no. 2, 1916, pp. 289-298, 

 4 figs. [Received 19th April 1920.] 



The plan and arrangements of a new laboratory in connection with 

 the Academy of Forestry at Eberswalde are described and illustrated. 

 It is intended for scientific research in economic zoologv. 



The comparatively low cost of erection of such local experiment 

 stations, as well as their many advantages both to students and Science, 

 is emphasised and the hope is expressed that such laboratories will 

 become more numerous. 



