449 



ScHLUMBKRGER (— ). Der Deutsche Pflanzenschutzdienst auf den 

 28. Wanderaustellung der D. L. G. in Leipzig vom 16. bis 21. Juni 

 1921. [Tlie German Plant Protection Service at the 28th Travel- 

 ling Exhibition of the German Agricnltural Society at Leipsic 

 from the 16th to the 21st June 1921.]^ Nachnchtenbl. deutsch. 

 Pflanzenschutzdienst, Berlin, i, no. 1, 1st July 1921, pp. 2-3. 

 In order to promote co-operation in work against vegetable and 

 animal enemies of plants, the Plant Protection Service developed in 

 1921 on a fairly large scale its previously rather restricted participation 

 in the travelling exhibition. Attention was chiefly given to pests 

 occurring in Saxony. Information on the work of the Imperial 

 Biological Institute was provided. 



Zaciier (F.). Ameisen als Wohnungsplage. [Ants as House Pests.] — 

 Nachrichtenbl. deiiiscli. Pflanzenschutzdienst, Berlin, i. no. 1, 1st 

 July 1921, pp. 7-8. 



The number of complaints of ants as indoor pests, especially in store 

 rooms, has increased in Germany. The predominant native species 

 are Lasius niger, L., and Tetramorium cacspitum, L., but the opinion 

 has been expressed that they are not responsible for the trouble, 

 and that the ants concerned have been imported with foodstuffs from 

 abroad. Marlatt has shown that nearl}/ all the house-infesting ants 

 in North America have been introduced from the tropics. One of 

 these, Monomoriumpharaonis, L., is an annoying pest in many localities 

 in Germany. 



The complete destruction of a nest and its inhabitants is the best 

 remedial measure. If the former is located out of doors, carbon 

 bisulphide or carbon tetrachloride may be poured into the entrance 

 holes, which must then be sealed. The ants themselves may be 

 combated indoors by pyrethrum powder. Napthaline or camphor 

 have only a slight repellent effect. A weak solution of arsenic, such 

 as a syrup containing \-\ per cent., is very effective, more so than a 

 stronger poison, as the ants live long enough to carry the material to 

 their larvae. A sponge soaked in the liquid may be placed in a con- 

 tainer, the lid of which is perforated so as to allow the ants to enter. 

 Food attractive to them must not be left exposed. 



vanEecke (R.). Kasbewonende Thysanoptera uit Nederland. [Green- 

 house Thysanoptera from Holland.] — Ent. Ber. Ned. Ent. 

 Vereen., The Hague, v, no. 118, 1st March 1921, pp. 313-314. 



The best known Thysanoptera found in greenhouses are Heliothnps 

 haeniorrhoidalis, Bch., and Parthenothrips dracaenae, Helger. These 

 occur in Holland, as do Heliothrips femoralis , Reuter, Euthrips orchidii, 

 Moulton, and E. longipennis, Bagn. 



Bagnall's list of the Thysanoptera from the Botanical Gardens in 

 Brussels {Annates Soc. Ent. Belgique, liii, 1909, pp. 171-176) is 

 given. 



OuDEMANS (J. T.). Bijdrage tot de Kennis der Parasieten en Hyper- 

 parasieten van de Gestreepte Dennenrups {Panolis griseovariegata, 

 Goz8). [A Contribution to the Knowledge of the Parasites 

 and Hyperparasites of the Pine Moth, P. flammea.] — Ent. 

 Ber. Ned. Ent. Vereen., The Hague, v, no. 119, 1st May 1921, 

 pp. 330-338. 

 Pines in Holland were severely infested in 1918 and 1919 by the 



pine moth., Panolis flammea, Sdixi^, {griseovariegata, Goze) [R.A.E., 

 (4023) 2 I 



