93 



England Walker recorded it from grass under the name of Isosoma 

 lineare. In Central Europe it has, up to the present, been recorded 

 from Agropyrum spp. only, from which von Schlechtendal described 

 it in 1890 as /. agropyri. Its habits vary with the food-plant, and 

 it does not appear to pass readily from one to another. 



Stellwaag (F.). Zusammenfassender Bericht iiber Versuche" zur 

 Bekampfung der Traubenwickler mit Blausaure. [A coniprehensi\'e 

 Report on the Experiments with Hydrocyanic Acid Gas against 

 Vine Moths.] — Netistadt a. H., 1919, 12 pp. (Abstract in Zeitschr. 

 Pflanzenkr., Shittgart, xxx, no. 6-7, 1920, pp. 243-244.) 



Against vine moths, fumigation with hydrocyanic acid has been shown 

 to be ineffective, whereas solutions of hydrocyanic acid in water are 

 ver}^ useful [R.A.E., A, viii, 427]. The spraying must be done in 

 winter ; if the application is made in summer, the green portions of 

 the vine are scorched even with ^'ery weak solutions. These observa- 

 tions on the difference between summer and winter sprayings also 

 apply to solutions containing derivatives of hydrocyanic acid which 

 develop the gas on the vine-stocks. The use of these has the advantage 

 of providing the vine-grower with solutions that are not particularly 

 dangerous. 



Krausse (A.). Ennomos quercinaria, Hfn., als Waldverderber. 



[E. quercinaria a,s a Forest Pest.] — Zeitschr. Forst- unci Jagdwesen, 

 1919, pp. 153-159, 6 figs. (Abstract in Zeitschr. Pflanzenkr., 

 Stuttgart, xxx, no. 6-7, 1920, p. 244.) 



Beeches in the Saarbriicken district have been defoliated by the 

 caterpillars of Ennomos quercinaria, Hfn. The flight period begins 

 at the end of June. An Ichneumonid, Pimpla examinator, F., was 

 bred from this moth. 



Sedlaczek (W.). Starkes Auftreten des griinen Eichenwicklers {Tortrix 

 viridana, L.) in der Wiener Gegend. i x^n Outbreak of T. viridana 

 in the Vienna District.] — Zeitschr. d. osterreichischen Entomolo- 

 genvereines, Vienna, iv, 1919, pp. 78-79. (Abstract in Zeitschr. 

 Pflanzenkr., Stuttgart, xxx, no. 6-7, 1920, pp. 244-245.) 



Part of the sandstone area in the Wiener Wald has been severely 

 infested by Tortrix murinana, Hbn., and T. rufimitrana, H. Sch., and 

 some stands of firs are likely to disappear as a result of their attack, 

 combined with the damage done by bark-beetles and fungi. Oaks are 

 threatened by T. viridana, followed by attacks of oak mildew and other 

 fungi, and by Scolytus intricatus, Ratz. Local preventi\'e measures 

 include the discontinuance of clear cutting of oaks in spring and 

 summer, thus ob\iating shoots from the stumps later on and the 

 consequent spread of mildew. The employment of natural enemies is 

 the only method available against T. viridana. 



Kk.vusse (A.). Ueber Dasychira pudibunda, L., bei Eberswald 1918. 



[D. pudibunda at Eberswald in 1918.] — Zeitsc/ir. f. Forst- and 

 Jagdwesen, li, 1919, pp. 445-447. (Abstract in Zeitschr. Pflanzenkr., 

 Stuttgart, xxx, no. 6-7, 1920, p. 246.) 



The infestation at Eberswald of Dasychira pudibmida, L., was 

 severe in 1918, though less so than in the preceding 3^ear [R.A.E., 

 A, vii, 454]. All the eggs, catei-pillars and adults examined by the 



