227 



trees and inhabits red, irregular swellings on the leaves, from which 

 winged forms emerge in June. These are viviparous and their 

 desendants live on grasses and maize. During the summer only 

 wingless forms occur, but in autumn winged individuals appear, which 

 return to elms and produce sexual forms. These oviposit in cracks 

 and holes in the bark, the eggs remaining over the winter. Tetraneura 

 nltni, de (J., has a similar life-history, the galls it produces being 

 green, oval and situated on short stems. 



Winter rape was attacked everywhere by Enlomoscelis adonidis, 

 Pall., and by Aphis brassicae, L., while clover was damaged by Apion 

 aprkans, Hbst. Market-garden crops were injured by Aphis gossypii, 

 Glov., which seriously damaged cucumbers and melons in places. 



TpYAbi KieBCKOM CraHuiM no 6opb6t Cb BpeAHrennMH pacreHiii npH 

 lOmHO-PyccH. 06im. Floomp. Zetun. h CenbCK. PIpoMbiiun. [Studies 

 from the Riev Station of the South Russian Agricultural 

 Syndiaite for the control of pests of plants], Petrograd, iii, 

 1914, 36 pp. 



The following three articles appear in this volume : — 



Shishkin (K.). HaOniofleHifl heat* npeepameHiewb cocHoearo me/iKO- 



npflAa. [Observations on the metamorphosis of Dendrolimus 

 pini, L.] pp. 3-17. 



A short account is given of the biology of Dendrolimus pini, L., based 

 on observations made during 1910, 1911 and 1912 on caterpillars and 

 pupae collected in the Zabolotchinsk Forest of the government of 

 Poltava. When the author visited the forest on 30th June 1910, 

 very few imagines could be seen, though a female was found from 

 which eggs were obtained. In the laboratory, the imagines emerged 

 between the 31st May and 5th August, the first imago in the open being 

 found on 23rd May. The statement by Seitz that female caterpillars of 

 Orgijia antiqua moult once more than the males is referred to, but in 

 this case the opposite was noticed. The caterpillars winter in the 

 3rd, 4th or 5th stage. One individual moulted 8 times, hibernated 

 for a second time, pupated in April and produced a female in May. 

 Caterpillars hatched from eggs laid by one and the same female have a 

 greatly varied duration of moulting periods, etc. 



ZviERKZOMB-ZuBKOVSKY (E. V.). S/iaTKa Agrilus hastnlifer, Ratzeb. 

 OOpasi} WMSHM M 6opb6a Cl> HCH. [Agrilus hastulifer Ratz. ; its 

 life-history and control.] pp. 19-23, 5 figs. 



Agrilus hastulifer, Ratz., was first reported as a forest pest in the 

 government of Kiev in 1905 and since then it has done considerable 

 damage every year to the forests of that government and of South- 

 western Russia generally, chiefly attacking oak and hornbeam. The 

 beetles, which are described and figured, are mostly found in 

 sunny places. The females oviposit on healthy trees in places 

 exposed to the sun, the eggs being laid in cracks, etc., of the bark. 

 The larvae, which are described and figured, mine into the bark and 

 wood. The insects winter in oval cocoons, at the end of the mines, 



