110 



of injury was observed in summer corn. On turnips and swedes 

 the infestation was less extensive than in 1917. Potatoes suffered 

 little, and carrots and winter rape were uninjured. In 1919 the 

 infestation was of even less importance. 



Abler (S.). Lebensweise und Fortpflanzung des Schmarotzers der 

 Kohlweisslingsraupe, A panicles glomeratiis, L. [The Life-history 

 and Reproduction of the Cabbage Butterifv Parasite, A. glomera- 

 tHS.]—Aiis. d. Natur, xvi, 1920, pp. 236-243. (Abstract in 

 CentralU. Bakt.. Parasit. u. Infektionskr., Jena, lite Abt., 

 Hi, no. 16-17, 20th December 1920^ pp. 396-397.) 



Much of the information here given has already been noticed from 

 a previous paper [R.A.E., A, ix, 37]. Apantelcs glomeratus only 

 attacks the young caterpillars of Pieris hrassicae when they are still 

 feeding on the egg-shells. As soon as they begin to feed on the cabbage 

 leaf they are able to eject some of the green plant juice at the Braconid, 

 causing it to desist and to crawl about the leaf endeavouring to cleanse 

 itself. The egg-stage of the butterfly lasts S-9 days in summer ; 

 this period can be prolonged in a cold room. The same applies to 

 the cocoons of .4. glomeratus, which otherwise require 6-8 days to 

 develop. There is, therefore, a reciprocal adaptation to temperature. 



TuRixETTT (L.). La Lutte centre la Mouche des Olives {Dams oleae) 

 en Italie. [The Campaign against the Olive Fly {Dacus oleae) 

 in Italy.] — Progres Agric. & Vitic, Montpellier, Ixxv, no. 1, 

 2nd January 1921, pp. 23-27. 



It is suggested that in the olive groves along the Mediterranean 

 coast south of Pisa, where Dacus oleae has been unusually abundant, 

 resulting in a heavy loss to the olive crop, the Berlese remedies might 

 be used with much success [R.A.E., A, ii, 452; iii, 36; iv, 159, 

 etc.]. Experiments in this district indicate that a first spray of 

 molasses and sodium arsenite should be applied from 1st to 10th July 

 against the first generation, and from 10th to 20th August against 

 the second generation. Where practicable the bait method might 

 also be used. These remedies promise equal success in the French 

 Riviera to that obtained in Italy, where conditions differ considerably, 

 but their use will necessitate the removal of the prohibition against 

 the use of soluble arsenical salts that is still in force in France. 



Howard (L. O.). Report [1919-1920] of the Entomologist.— t/.S. 



Dept. Agric, Bur. Ent., IFasAm^/o;?, Z).C., 7th September 1920, 

 36 pp. "[Received 7th January 1921.] 



Since the last report [R.A.E., A, viii, 93] many fresh areas of 

 infestation by the European corn borer [Pyrausta nubilalis]^ ha.ve 

 been recorded, adding many hundreds of square miles to the previously 

 known area, some of them evidently being infestations of several years' 

 standing. Flight experiments for determining the possible rate of 

 the natural, spread of this moth have shown a maximum flight of 

 1,300 yds. Egg-clusters have been found on several crops other than 

 maize, such as beet, rhubarb, celery, lettuce and several wild plants. 

 In eastern Massachusetts the larvae have been observed to feed 

 upon cotton to some extent. Some study has been made in the south 

 of France and in Italy of the parasites of P. nubilalis, three having 

 been found in France and four in Italy. 



