473 



Della Beffa (G.). La Limacina del Pero {TcntJiredo limacina). 

 [The Pear Slug, Eriocampoides limacina.] — R. Osservatorio 

 Fitopatologia, Turin, Foglio d'lstruzione 14, 1921, 3 pp., 1 fig. 



Although Eriocampoides ( Tenthredo) limacina is not a very dangerous 

 orchard pest in Italy, it has done considerable damage in various 

 regions there. Its life-history is briefly described. It is difficult 

 to prevent an outbreak and preventive measures are likely to be 

 unprofitable. It is best to watch the plants, and if serious loss 

 is threatened dusting with quicklime, sulphur, or tobacco should be 

 employed. A lead arsenate or nicotine spray may also be used. By 

 digging up the ground from November to May and then rolling it, a 

 large number of pupae are destroyed. 



Della Beffa (G.). H Sigaraio {Rhynchites hetulae). [The Leaf-roller, 

 R. betidae.] — R. Osservatorio Fitopatologia, Turin, Foglio dTstru- 

 zione 15, 1921, 3 pp., 1 fig. 



Rhynchites betidae attacks a large number of plants, but prefers 

 vine, poplar and pear. It is harmful only when very abundant. The 

 best remedial measure consists in collecting and burning the curled- 

 up leaves early in June, before they fall. Outbreaks would not occur 

 if this were an annual practice. Collection of the weevils in the early 

 morning or by jarring the trees may also be useful. Spraying with a 

 2 per cent, solution of nicotine is a preventive against an outbreak. 

 Parasitic enemies, such as Bracon, Microgaster and Pimpla, are, 

 unfortunately, difficult to encourage artificially, so that their undoubted 

 value is largely discounted. 



Della Beffa (G.). II Cervo Volante e il Dorco {Lucanus cervus — 

 Dorcus parallelepipedns). [The Stag Beetle, L. cervus, and 

 D. par allele pip ediis.'] — R. Osservatorio Fitopatologia, Turin, 

 Foglio dTstruzione 18, 3 pp., 1 fig. 



The Lucanid beetles, Lucanus cervus and Dorcus parallelepipedns, 

 have \'ery similar habits. The former prefers old oaks, but also 

 attacks willows and mulberries. The latter, which is more abundant, 

 infests a larger range of plants, those already named and poplars being 

 preferred. The larval and pupal stages are passed within the trunks. 

 These beetles appear in larger numbers every foiir or six years, when 

 collection should be especially practised, the trunks being smeared in 

 places with honey. In the evening nets may be used. The larvae 

 may be killed in their mines by a wire or by petrol fumes from a plug 

 of cotton wool. 



SiLVESTRi (F.). Contribuzioni alia Conoscenza biologica degli Imenot- 

 teri parassiti. V. Sviluppo del Platygaster dryomyiae, Silv. (Fam. 

 Proctotrupidae). [A Contribution to the biological Knowledge 

 of parasitic Hymenoptera. V. The Development of a Procto- 

 trupid, P. dryomyiae.] — Boll. Lab. Zool. Gen. Agrar. R. Scuola 

 Sup. Agric, Portici, xi, 1916, pp. 299-326, 16 figs, 3 plates. 

 [Received 3rd August 1921.] 



The preamble of this paper is a brief account of the life-history 

 of Dryomyia lichtcnsteini, F. Low, the Cecidomyiid host of the 

 Proctotrupid dealt with. 



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