55 



Andrews (E. A). Address on the Control of the Mosquito Bhght of 

 Tea {Htiopeltis theivora, Waterh.) given by the Entomologist before 

 the Committee of the India Tea Association (London). — Qtrly. 

 Jl. Scieni. Dept., Ind. Tea Assoc, Calcutta, 1920, pt. iii, pp. 67-82. 



The more important conclusions drawn from the investigations 

 recorded in this paper have been previously noticed [R.A.E., A, viii, 

 204 J. Natural means of control of Helopeltis theivora (mosquito blight) 

 on tea in India are not promising. A Mermithid worm destroys 

 perhaps 2 per cent, of the insects ; it is thought that in China or 

 Japan, where damage by H. theivora is apparently never recorded, 

 there may be some effective parasite that might be successfully 

 imported. 



The bionomics of this Capsid are discussed, and a chart shows the 

 seasonal history. As all stages of several generations are present at 

 once, there is no specific period when the application of insecticides 

 can be recommended with confidence. Lime-sulphur can be used 

 with success against the adults on small areas, if the treatment is 

 begun early in the season and is given repeatedly and efficiently. 

 Fumigation has also given some success when the infestation was not 

 too severe and when the evening breezes were favourable ; tests are 

 to be made with some of the newly-discovered poison gases. The 

 possibility of controlling this pest indirectly, by treatment of the 

 plants, has already been discussed at length Uoc. cit.']. 



Stift (A.). Ueber im Jahre 1919 veroffenthche bemerkenswerte 

 Arbeiten und Mitteilmigen auf dem Gebiete der tierischen und 

 pflanzlichen Feinde der Zuckerriibe. AVorks and Communications 

 of A^alue pubHshed in 1919 concerning the Animal and Vegetable 

 Enemies of the Sugar Beet.] — Centralbl. Bakt., Parasit. u. Infek- 

 tionskr., Jena, lite Abt., Hi, no. 9-12, 10th November 1920, 

 pp. 244-252. 



The subject-matter of this review is indicated by its title. 



Cecconi (G.). Manuale di Entomologia Forestale. — Florence, Ease. 8, 

 1920, 64 pp., 71 figs. TReceived 7th December 1920.] 



The eighth part of this work [R.A.E., A, vii, 351] covering pp. 

 449-512 concludes the section on Coleoptera and begins the description 

 of the Diptera ; many of these are beneficial, being enemies of other 

 insects that are forest pests. 



Degrully (L.). Les Traitements d'Hiver contre Cochylis et Eudemis. 



[Winter Treatments against Clysia aiiibigiiella and Polychrosis 

 botrana.] — Progres Agric. & Vitic, Montpellier, Ixxv, no. 49, 

 5th December 1920, pp. 533-539, 3 figs. 



The infestation of Erench and Algerian vineyards in 1920 by Clysia 

 ambiguella and Polychrosis botrana has been considerable, although 

 perhaps more definitely localised than in preceding years. The 

 importance of preventive winter treatments and of preventive and 

 remedial measures in summer is emphasised, and the principal winter 

 treatments are described and the necessary tools illustrated. 



