92 



however, that breeding is controlled in the tropics to some extent by 

 the activities of the food-plants in supplying proper conditions for 

 oviposition. 



Remedial measures consist in burning the fallen seeds and fruit to 

 destroy the pupae. If, however, the presence of wild trees that are not 

 readily accessible or easily eliminated makes this impracticable, it 

 may be possible to protect cultivated fruit by arsenical sprays, for the 

 weevils feed freely on the leaves and doubtless drink drops of water 

 off them. 



Merk-Buchberg (M.). Die Spiimen in ihrer Jorstlichen Bedeutung, 



[Spiders considered from the Point of View of their Importance 

 in Forestry.]— De;' Deutsche Jiiger, xh, 1919, pp. 232-233. 

 (Abstract in Zeitschr. Pflanzenkr., Stuttgart, xxx, no. 6-7, 1920, 

 p. 230.) 



Spiders of economic importance as destroyers of forest pests include : 

 Plialangina parietintmi, which preys on the spruce gall-midge, and 

 allied species ; Epeira umhratica, CI., and species related to it ; 

 Pholeus optioneides , Schr. ; Drassus lapidicola, Walck. ; Segestria 

 sexoculata, L. ; Thomisus vatius, CI. ; Micromata virescens ; Artenes 

 margaritatus, CI. ; Oxyopes ramosus, Panz. ; Dolomedes mirahilis, 

 CI. ; Dendriplantes rudis, Koch; and Saltisciis sceniscus, CI. 



An appeal is made to foresters to collect further information on 

 spiders. 



UzEL ( — ) & Rambousek ( — ). Ueber die schwarze Blattlaus. [The 



Black Aphis.] — Zeitschr. Zuckerind. Bohmen, Prague, xliii, 1919, 



pp. 36-38. (Abstract in Zeitschr. Pflanzenkr., Stuttgart, xxx, 

 no. 6-7, 1920, pp. 233-234.) 



The black aphis of beet [Aphis rmnicis] hibernates in the egg and 

 larval stages. In autumn it occurs on Atriplex and Capsclla (shepherd's 

 purse), then on Euonymus, on which the winged individuals develop. 

 These migrate to Rumex, Chenopodium, and nightshade before 

 infesting beet. 



EuLEFELL) ( — ). Die Buchenwollsehildlaus. The Beech Scale.] — 

 Deutsche Forstztg., xxxiv, 1919, p. 498. (Abstract in Zeitschr. 

 Pflanzenkr., Stuttgart, xxx, 6-7, 1920, p. 236.) 



Attention is drawn to the increase of the beech scale, Cryptococcus 

 (Coccus) fagi, in the Vogelsberg region (Germany) ; trees maj' be 

 killed as a result of severe infestations. 



ZiMiMERMANN (H.). Ein neuer Schadling an Spargel und Bohne. A 

 new Pest of Asparagus and Beans. J — Bliittcr f. Obst-, IlVm- und 

 Gartenbau, Briinn, xvii, 1919, pp. 10-11. (Abstract in Zeitschr. 

 Pflanzenkr., Stuttgart, xxx, no. 6-7, 1920, p. 238.) 



In south Moravia (Austria) Phorbia [Chortophila) irichodactyla, Rond., 

 attacks asparagus as well as beans planted among asparagus beds. 



Hedicke ( — ). Isosoma horde i, Harr., als Getreideschadling. J. hordei 

 as a Pest of Corn.]— Dent. ent. Zeitschr., 1919, pp. 205-206. 

 (Abstract in Zeitschr. Pflanzenkr., Stuttgart, xxx, no. 6-7, 1920, 

 p. 242.) 



In 1830 Harmolita [Isosoma) hordei, Harr., was recorded in North 

 America as a pest of various cereals, especially wheat and rye. In 



