supplies of nicotine were just sufficient to spray against the first 

 generation of the vine motlis [Clysia amhiguel'la and Polychrosis 

 botrana] ; and vine-growers resorted to arsenicals against the second 

 generation with great success and without untoward consequences. 

 This last point is emphasised, attention being drawn to the enormous 

 quantities used throughout the world, to the arsenic content of various 

 food-stuffs and of the water of various medicinal springs. In the 

 instructions for spraying the second generation of vine moths it was 

 laid down that spraying should not be carried out less than 5 weeks 

 before the vintage, thus precluding any possible danger. Since 1917, 

 arsenicals have proved invaluable both to vine-growers and orchardists, 

 and it is very necessary that stringent legislation should not deprive 

 them of their crops. 



In a supplementary note Dr. Eschcrich sharply criticises a circular 

 issued by the Imperial Biological Institute in conjunction with the 

 Imperial Health Ministry in which the use of arsenicals against the 

 second generation of vine moths is deprecated as dangerous. 



Zacher (F.). Neue und wenig bekannte Spinnmilben. [New and 

 Httle-known Spinning Mites.] — Zeitschr. angew. Entom., Berlin, 

 vii, no. 1, September 1920, pp. 181-187, 16 figs. 



A few preUminary descriptive notes are given on a number of spinning 

 mites, some being new species, including Paratetranychns gossypii, sp. 

 n., from cotton leaves in Togo, this being the first definite record of a 

 spinning mite on cotton in Africa ; Paratetranychus sp., from leaves of 

 Terminalia catappa in East Africa ; P. pilosus, C. & P., the food- 

 plants of which in Germany include grape-vine, Ribes sanguineum, 

 pears, apples, Rosa sp., plums and other species of Pninus ; Parate- 

 tranychus iinunguis, Jac, on young oaks forming an undergrowth in a 

 pine forest near Berhn, and probably an accidental infestation, the oak 

 spinning-mite being Tetranychus carpini, Oud. ; Schizotetranychus 

 schizopus, Zacher, from various willows {Salix spp.) in Germany ; 

 Tetranychus carpini, Oud., from oak and hazel {Corylus avellana and 

 C. maxima) in Germany; Tetranychus telarius, L., on hme, maple and 

 horse-chestnut in Germany ; T. salicicola, sp. n., from Salix daphnoides, 

 S. viminalis, S. alba, and Populus candicans in Germany ; T. {Epite- 

 tranychus) viennensis, sp. n., from pear, Prunus acida, and P. avium 

 var. Juliana, in Austria and Germany ; T. [E.) ludeni, Zacher, on 

 Hibiscus rosa-sinensis, Abutilon spp., Acalypha spp., Solanum melongena, 

 Phvsalis peruviana. Salvia splendens, Dolichos lablab and other plants 

 in France and Germany, into which latter country it must have been 

 introduced, as it does not occur on native wild plants. 



Ein deutscher Reichskommissar fur Schadlingsbekampfung. [A German 



Imperial Commissioner for Pest Control.] — Zeitschr. angew. 

 Entom., Berlin, vii, no. 1, September 1920, pp. 188-189. 



Commenting on the recent appointment of a German Imperial 

 Commissioner for Pest Control who will deal with all injurious insects, 

 a viticultural journal points out that viticulture will greatly benefit, 

 but only if this official is provided with all needful Resources and is not 

 subject to hindrance by other departments. 



(7467— A) B 2 



