266 



EscHEEiCH (K.). Hopfenschadlinge. [Hop Pests.] — Zeitschr. j\ 

 angeiv. Entom., Berlin, iii, no. 2, 1916, pp. 311-313, 2 figs. 

 [Received 19th April 1920.] 

 Considerable damage was caused during 1916 to hops in the Hollerdau 

 district by the hop aphis, Phorodon humuli, Schrlc., as well as by flea- 

 beetles. The latter were most abundant in fields Avhere cultivation 

 had been retarded. Sprays consisting of a 1 or 2 per cent, soft-soap 

 solution with the addition of a little petroleum, tobacco extract or 

 barium chloride, are advocated against Phorodon humuli. The 

 necessity for further study of hop pests is emphasised. 



EscHERiCH (K.). Eine Clytus-KalamitSit in der Pfalz. Clytus 



■{Plagionotus) arcuatus, L. (Coleopt., Cerambyeidae) als Eichen- 



schadling. [An outbreak of Clytus in the Palatinate. Clytus 



{Pl(igionotus) orcuatus, L., as a Pest of Oak.] — Zeitschr. f. angeiv. 



Entom., Berlin, iii, no. 3, 1916, pp. 388-397, 4 figs. [Received 



19th April 1920.] 



The observations made with regard to the damage to oaks by the 



Cerambycid beetle, Clytus areuatus, during 1916 are described [R.A.E., 



A, iv, 441]. The maximum damage is caused to felled timber, though 



unhealthy growing trees may also be attacked. The length of the 



life-cycle has not yet been determined in the district under consideration. 



It is most important to clear the logs as early as possible to prevent 



infestation ; they should all be removed by the end of April at the 



latest ; where this is impossible they should be placed in the shade. 



The application of luminous paints may prevent oviposition. The 



chief natural enemies are woodpeckers and Ichneumonid parasites. 



Loos (K.). Der Kampf gegen Maikafer und Engerling mit besonderer 

 Berucksichtigung der Vogelwelt. [The Campaign against Cock- 

 chafers and Grubs with special Consideration of Birds.] — Zeitschr. 

 f. angeiv. Entom., Berlin, iv, no. 1, 1918, pp. 1-15. [Received 19th 

 April 1920.] 

 It is recognised that collection of the adults and grubs of Melolontha 

 is at present the only possible means of reducing cockchafer infestation, 

 and therefore the necessity for organising campaigns to carry out this 

 work is emphasised. Once the infestation is reduced to the normal, 

 i.e., about 280 individuals to the acre, birds may be relied upon to 

 keep the pest under further control, provided that any abnormal increase 

 in numbers is immediately reduced by systematic hand- collection. 

 The birds referred to include gulls and starlings, and their value in 

 destroying this pest is discussed. 



Kleine (R.). Die Getreideblumenfliege, Hylem,yia coarctata, Fall. 



Diesjahrige Beobachtungen in Pommern. [Hylemyia coarctata, 



Fall. This Year's Observations in Pomerania.] — Zeitschr. f. angew. 



Entom., Berlin, iv, no. 1, 1918, pp. 16-24, 1 fig. [Received 19th 



April 1920.] 



Further observations on Hylemyia coarctata, Fall. [R.A.E., A, viii, 



253] show that infestation does not so much depend on the preceding 



crop as on the condition of the ground. Crops grown on heavy soils 



are usually more free from attack than those grown on light ones. 



