81 



Nygmia phaeorrhoea {Euproctis chrysorrhoca), Lymaniria dispar, and 

 Cydia {Carpocapsa) pomonella. Lists of the hosts of Apanieles 

 glomcratiis, L., Pimpla alternans, Grav., and Trichogramma {Peniar- 

 ihron) semhlidis, Aiiriv., are also given. 



Palm (B. T.). Verslag van het Deli Proefstation over 1 Juli 1920- 

 30 Juni 1921. [Report of tlie DeH Experiment Station from 

 1st July 1920 to 30th June \Q2\.]—Meded. Deli Proefst., Medan, 

 2nd Ser., no. 21, 1921, pp. 1-43. [Received 9th December 1921.] 



The new method of spraying insects infesting tobacco seed-beds 

 with lead arsenate and soap [R. A.E., A, ix, 85] is being largely used 

 with satisfactory results, though variations in the quality of the arsenate 

 have caused scorching in some cases. A field experiment with the 

 emulsion resulted in a 30 per cent, reduction of the caterpillars present. 

 A system of making nursery beds as traps was tried with good results, 

 an average of 300 caterpillars being taken per bed. Fumigation of 

 harvested tobacco with hydrocyanic acid gas did not come up to the 

 high expectations formed. This was due to the appearance of green 

 spots on the treated leaf. Investigations are being made on this sub] ect. 

 The species of Phytometra {Plusia) found on tobacco in Deli has been 

 determined as P. signata, F. ; the species occurring on tobacco in the 

 Philippines is P. chalcifes, F. At the end of 1920 Lasioderma [serri- 

 cornc] increased in fermenting leaf on some estates ; it was successfully 

 combated by fumigation with hydrocj'anic acid gas. 



Cydia molesfa on the Italian Riviera. — Riv. Biologia, Rovic, iii, no. 4, 

 July-August 1921, pp. 565-566. 



Larvae, suspected by Dr. G. Paoli to be those of the Oriental peach 

 moth, Cydia (Laspeyresia) molesfa, Busck, were observed on the 

 Italian Riviera in October 1920. Adults have since been obtained, 

 proving the estabhshment of this pest all along the coast between 

 Savona and the French frontier. At present the infestation is confined 

 to the tips of the branches on peach trees, and as the Ligurian growers 

 are in the habit of removing these in pruning, the}' do not treat the 

 infestation seriously. If the injur}- extends to the fruit, there will, 

 however, be reason to regret the substitution of American peaches 

 for the local varieties formerly grown. 



Anarsia lineatella, Z., which causes a similar injury, has also been 

 found, but is rare and is attacked by many parasites, whereas 

 C. niolesta does not seem to have any in this region at present. 



Calmbach (V.). Lyonetia clerkcUa, L. — Ent. Zeitsckr , xxxiv, 1921, 

 pp. 97-98. (Abstract in Wiener landivirtsch. Ztg., 1921 , no. 94-95.) 



Lyonetia clerkeUa, L., has two annual generations, the autumn 

 one hibernating in the adult stage. The eggs are laid on the young 

 leaves of Betiila alba, Prnmis cerasus, Pyriis, Crataegus and Sorbiis, 

 the first two being the preferred food-plants. 



Calmbach (V.). Tischeria complanella, Hb. • — Ent. Zeitschr., 

 xxxiv, 1920, p. 70. (Abstract in Wiener landwirtsch. Ztg., 1921, 

 no. 94-95.) 



The larv'ae of Tischeria complanella, Hb., cause disfiguring white 

 spots on oak leaves. From three to five individuals may occur on 



