107 



ZviEREZOMB-ZuBOVSKY (E.). OSsop'b BpeflMTeneM. fReviewofthe 

 Pests of Agriculture] OTseTis fltflienbHOCTM floHCKoro Biopo 

 no Bopb5t cb BpeflMTenfliviii CenbCKoxo3flHCTBeHHbixi> PacTeHiti 



3a 1918 fOAlj. [RejHvi on the Work <)f the Don Bumru for the 

 Control of Pests of Agricultural Phints for 1918], Rostoff, 1919, 

 pp. 8-29, 15 figi. [Received 1st January 1920.J 



Owing to adverse circumstances as a result of general conditions 

 in the Don district the experimental work planned for the year under 

 review had to be abandoned and the general activities of the Bureau 

 very much reduced. 



The hst of noxious insects has been augmented and contains a number 

 of new ones in addition to most of these in the previous one [see 

 preceding paper]. 



Acarids include : — Eriophyes pyri, Pgst., on pears. 



Rhynchota : — Stephmiitis pyri, P., on apples, pears and hawthorn ; 

 Aphis gossypii, Glov., on melons and pumpkins ; Aleurodes sp. causing 

 serious damage to geraniums in hot-houses, there being about 10 

 generations a year and the life-cycle occupying about 36 days (this 

 white-fly may also migrate to roses under laboratory conditions). 



Lepidoptera : — Tortrix (Cacoecia) rosana, L., on elm, ash, maple, lilac 

 and rose ; T. (C.) xylosteana, L., on ash and raspberry ; T. {Pandemis) 

 heparana, Schiff., on pears, plums, cherries and apricots ; Cydia 

 (Grapholitha) dorsana, F., on peas ; Enarmonia (Semasia) minutana, 

 Hb., on poplars : TrochUiiim apiforme, CI. ; Aegeria (Sesia) myopae- 

 formis, Bkh., in June and July ; Plodia inter punctella, Hb., in dried 

 cherries ; Pieris napi, L., on the wing from March to May, from 

 mid- June to the end of July and end of August to about 20th of October ; 

 Eriogaster lanestris, L., on cherry leaves ; Pygaera •'urtula, L., on 

 ])oplars in June ; Biston hirtarius, CI. ; Demas coryli, L. ; and Agrotis 

 saucia, Hb., in July. 



Coleoptera include : — Sylvanus {Oryzaephilus) surinmnensis, L. ; 

 in dried cherries and grain Crioceris asparagi, L., and C. quatuor- 

 decimpunctata, Scop. ; Rhynchifes giganteus, Kryn., causing great 

 damage to winter pears in May ; Myelophilus pi^iipierda, L., in pine 

 trees ; Rhizotrogus aestivus, Oliv. ; Melolontha hippocastani, F., on 

 pines. 



Diptera, Scenopinus sp. in flour. 



Hymenoptera :• — Lyda sp. on common pine, but not attacking Austrian 

 pine ; Trachelus tabidus, F., attacking rye, both mnter and spring wheat 

 and oats. 



ZviEREzoMB-ZuBovsKY (0). Ki, BionorJM M Mop(J)onoriM Maepw- 

 TaHCKOil KoSflBKM. [On the Biology and Morpliology of Tenehroides 

 mauritunicus, L ]— OiHeTTj A'^flTejibHOCTM floHCKoro Biopo no 

 Bopb6t Cb BpeAMTenflMM Ce/ibCKOxosflJicTBeHHbix'b PacreHiM 3a 



1918 fOfllj. [Report on the Work of the Don Bureau for the Control 

 of Pests of Agricultural Plants for 1918], Rostojf, 1919, pp. 1-8, 

 10 figs. [Received 1st January 1920.] 



The adult beetles of Tenehroides mauritanicus, L., have been found to 

 be predaceous on the larvae of various bark-eating insects, but in 

 captivity they have been reared entirely on flour. The first adults 

 were noticed in store-houses at the beginning of April. Oviposition 



