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V. Lexgerken (H.). Eine neue Mordellistena (Coleopt.) aus Columbien 

 als Schadling an Orchideenkulturen. A new Mordellistena from 

 Colombia as a Pest of cultivated Orchids.] — Zeitschr. angew. 

 Entom., Berlin, vi, no. 2, February 1920, pp. 409-411. "Received 

 2nd December 1920.] 



In February 1919 the leaves of Cattleya lahiata in an orchid house 

 in Berlin were severely injured by a new beetle that appears to have 

 been imported with Cattleya trianaei from Colombia. The name 

 Mordellistena beyrodti has been given to this species, a description 

 of which is being published in the Zoologische Jahrbiicher by W. Spengel. 

 The egg is laid in the leaf, which becomes discoloured at the puncture, 

 and the larva usually feeds between the leaf-veins. In May all larval 

 stages may be found, often on one leaf, and pupae and adults about to 

 emerge also occur. 



Experiments with hydrocyanic acid gas showed that it is not suitable, 

 as the plants suffer at strengths that do not affect the larvae. Fumi- 

 gation with substances containing nicotine, however, appear to give 

 good results against the adults. 



Oberstein ( — ). Ueber ein Massenauftreten von Braconiden-Kokons 

 in bodenstandig-schlesischer Rotkleesaat. i A Mass Occurrence of 

 Braconid Cocoons in Silesian Red Clover Seed.] — Zeitschr. angew. 

 Entom., Berlin, vi, no. 2, February 1920, pp. 411—412. Received 

 2nd December 1920.] 



The occurrence of large numbers of pupal envelopes of a Braconid 

 is recorded from red clover seed of Silesian origin. Sorauer has pointed 

 out that weevils belonging to the genus Apion are particularly apt to be 

 attacked by such Hymenopterous parasites, and it is therefore advisable 

 that seed-cleaning works should deal suitably with any large number 

 of cocoons that may be noticed. 



Die Deutsche Gesellschaft fiir Sehadlingsbekampfung. [The German 

 Company for Combating Pests.] — Zeitschr. angew. Entom., Berlin, 

 vi, no. 2, February 1920, pp. 413— 1-14. ^Received 2nd December 

 1920.] 



The German Company for Combating Pests, Limited, is an under- 

 taking established for the public welfare, and is controlled by the 

 Imperial Government, which distributes the profits in furtherance of 

 investigations on the combating of pests. The company is not directly 

 concerned with entomology, technical chemistry, or applied botany, 

 but carries out, commercially, the methods originated by entomologists, 

 chemists, or botanists. It limits its activities to such business as requires 

 commercial treatment. Fumigation with hydrocyanic acid gas is the 

 principal method employed. 



Stellwaag ( — ). Kellervergasung gegen die Korkmotte. Cellar 

 Fumigation against the Cork Moth.] — Zeitschr. angew. Entom., 

 Berlin, vi, no. 2, February 1920, p. 416. [Received 2nd December 

 1920.] 



Fumigation with hydrocyanic acid gas has proved entirely successful 

 against the cork moth, which in this instance had infested a cellar 

 for several years. 



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