267 



This is not due to the soil composition, but rather to the greater 

 humidity and ooohiess of heavier ground. It is advisable to begin 

 preparing the ground for seed as soon as possible after the harvest, 

 and early sowing is also advocated so that the plants may outgrow 

 infestation. 



PopoFF (M.) & JoAKiMOFF (D.). Uber die Zuchtung phylloxerafester 

 Reben. [On the Training of PhijUoxcra-Tesistant Vines.] — Zcitschr. 

 f. angew. Entom.. Berlin, iv, no. 1, 1918, pp. 31-33. 

 PopoFF (M.). Die Losung der Phylloxerafrage durch Reformierung 

 der Rebenkultur. [The Solving of the Phj/lloxem Question by 

 n6w Methods of cultivating the Vine.] — Ibid, v, no. 2, 1919, pp. 

 217-225. [Received 19th April 1920.] 

 The advisabihty of growing vines on trees, etc. [R.A.E., A, v, 533], 

 as a measure against Phylloxera, in countries with less favourable 

 climatic conditions than those existing in Bulgaria is discussed, and 

 suggestions are made for the training of vines so that they may benefit 

 by the heat reflected from the ground. 



Stitz (H.). Die Beziehungen der Ameisen zum Menschen und ihre 



wirtschaftliche Bedeutung. [The Relation of Ants to Man and 



their Economic Importance.] — Zeitschr. f. angew. Entom., Berlin, 



iv, no. 1, 1918, pp. 71-128. [Received 19th April 1920.] 



Ants in general are here discussed from the point of view of their 



economic importance. The beneficial species are dealt with under the 



headings of those used for food, as improvers of soil, as destroyers of 



noxious insects and as distributors of seeds. In certain districts 



where the bark of Acacia spp. does not crack as a result of weather 



influences the valuable gum exudes from incisions made by ants. 



The damage caused by ants includes the inconvenience caused by 

 biting species, the transmission of pathogenic micro-organisms, and 

 injury to plants, especially in connexion with the fostering of Aphids 

 and Coccids. The natural enemies of ants and the various artificial 

 remedial measures are reviewed. The paper includes an extensive 

 bibliography of the literature of the subject. 



Fkickhinger (H. W.). Blausaure im Kampf gegen die Mehlmotte 



{Ephestia kiihniella, Zeller). [Hydrocyanic Acid in the Control 

 of the Flour Moth.] — Zeitschr. f. angew. Entom., Berlin, iv, no. 1, 

 1918, pp. 129-140, 4 figs. [Received 19th April 1920.] 

 In view of the efficacy of hydrocyanic acid gas fumigation in the 

 control of the Mediterranean flour moth, Ephestia kiihniella, Z., in 

 America, it has been tried in Germany Avith equal success. The ex- 

 perimental fumigation of a mill and the method employed are described. 



Andres (A.). Starke Beschadigung von gelagertem Reis durch die 



Mehlmotte {Ephestia kiihniella, Z.) [Great Damage to stored 



Rice by the Meal Moth.] — Zeitschr. /. angew. Entom., Berlin, iv, 



no. 1, 1918, pp. 150-151. [Received 19th April 1920.] 



The infestation is recorded of large quantities of rice with Ephestia 



kiihniella when stored in buildings that had contained infested flour 



the remnants of which had not been properly cleaned out. 



