102 



A list of the food-plants of the respective beetles concerned is given, 

 and from this it is shown that those in the first category hve mainly 

 in trees "v^dth a hard heart-wood, while the food-plants of the second 

 comprise soft-woods or timbers with a very broad sapwood, in which 

 the pupal chamber is formed. It is therefore concluded that the 

 simple type of operculum has been evolved by species normally 

 breeding in hardwoods which do not lose or absorb large quantities 

 of water from the heart-wood, and that the complete egg-shell type 

 is found in species that breed in soft-woods which are hable to rapid 

 desiccation and greater extremes of moisture conditions. 



ZviEREzoMB-ZuBovsKY (E). Smmhah BopbBa ctj BpeAMTejiflMM B-b 

 Cafly. [Winter Control of Garden Pests.]— flOHCKOe Bwpo nO 



5opb6"b ctj BpeAMTejiflMM CejibCKO-XosfliiCTBeH. PacTeniM, 



HOBOMepKacCK"b. [Don Bureau for Control of Pests of Agricultural 

 Plants, Novotcherkasst] Leaflet no. 1, 4 pp., 4 figs. [Received 

 1st January 1920.] 



Special attention is called to the necessity of winter treatment of 

 orchard trees, since all insecticides required for later treatment are 

 practically unobtainable in the south of Russia in present circum- 

 stances. The remedial measures advocated include the destruction 

 of winter nests of Aforia crataegi, L., and of the gold-tail moth [Arctornis 

 chrysorrhoea, L.], as well as the egg-masses of the lackey moth [3Iala- 

 cosoma neustria, L.] and the gipsy moth [Porthetria dispar, L.]. All 

 overwintering larvae, such as those of Cydia, should be removed from 

 cracks, etc., in the bark and burned, the bark being painted with a 

 mixture of 4 lb. of freshly slaked and sifted hme, and half a glass 

 full of clay to 1 bucket of water. The soil in orchards should be well 

 dug over so as to destroy any pests hibernating in it. 



ZviEREzoMB-ZuBovsKY (E.). OHepeflHbifl PaSoTbi no BopbSt CI* 

 BpeAMienflHM B1» noni. [Routine Work for the Control of 

 Pests in the Field.]— flOHCKOe Biopo nO BopbOt CI, BpeAMTejiflMM 

 CenbCKO-XoaflMCTBeH. PaCTeHlM, HoBOMepKaCCKl,. {Don Bureau 

 for Control of Pests of Agricultural Plants, NovotcherkassL] 

 Leaflet no. 2, 3 pp., 3 figs. [Received 1st January 1920.] 



The necessity for the collection and burning of all stubble of maize 

 and sunflower plants in the early spring to ensure the destruction 

 of the hibernating larvae of the European corn borer [Pyrausta nubilalis, 

 Hb.], [MordelUstena p)arvula, Clyll.] and the Longicorn [Agapanthia 

 dahlii, Richt.], is emphasised. 



ZviEREzoMB-ZuBovsKY (E.). OnepeAHbifl PaSoTbi no BopbSt ci> 

 BpeAMTejiflMM BT, AwSapt. [Routine Work for the Control 

 of Pests in Storage] floHCKOe Biopo no Bopb6t CTj BpeAMTenflMM 

 CejlbCK0-X03flMCTBeH. PaCTeHJM, HoBOMepKaCCKT,. [Don Bureau 

 for Control of Pests of Agricultural Plan ts, Novotchcrkassk. ] Leaflet 

 no. 3, June 1918, 3pp. [Received 1st January 1920.] 



This bulletin deals in a popular form with methods of cleaning out 

 barns and other storage places in summer in preparation for storing 



