401 



100 per cent. ; Angerona prunaria, L., 100 per cent. ; Pyrameis 

 cardui, 100 per cent. ; Acronycta tridens, Schiff., 86 per cent. ; and 

 Eurygaster integriceps, Put., 80 per cent. Dipterous parasites specially 

 infested : Trichiocmnpus {Cladius) vimincdis, Fall., 100 per cent. ; 

 Tipula oleracea, L., 100 per cent. ; Sphinx Ugustri, L., 74 per cent. ; 

 and Orgyia antiqua, L., 70 per cent. 



The following pests are reported : — Arachnoidea : Tetranychus 

 telarius, L. Eriophyes ribis, Nal., on black currants and E. pyri, L., 

 which occurs over the whole government. 



Insecta :■ — Orthoptera : Locusta (Pachytylus) migratoria, L., 

 CaUiptamus (Caloptenus) italicus, L., Chorthippus (Stenobothrus) 

 pulvinatus, F.-W., Stethophygma {Mecostetluis) grossum, L., Oedaleus 

 nigrofasciatus, de Greer, Tettigonia (Decticus) vemicivom, L., Phasgonura 

 (Locusta) viridissima, L., Onconotus laxmanni and Gryllotalpa gryllo- 

 talpa, L. 



Thysanoptera : Haplothrips tritici, Kurd., and Limothrips denti- 

 cornis, Hal., which was specially numerous on fields damaged by the 

 zizel mice {Spermophilus guttatus, Temm). 



Rhynchota : Eurygaster integriceps, Osh., which was attacked by 

 various parasites, including Telenomus sokolowi, Mayr, and T. semis- 

 triatus, Nees, which destroyed 80-90 per cent, of the eggs ; a hyper- 

 parasite, Encyrtus sp., was also present, but its activity was not great ; 

 experiments showed that both these species of Telenomus can increase 

 parthenogenetically and also infest the eggs of other Pentatomidae ; 

 Eurygaster maurus, F., and E. austriacus, Schrank, were also found, but 

 in smaller numbers ; Eurydema oleraceum, L. ; Tingis pyri, F. ; 

 the Jassid, Cicadula sexnotata. Fall. ; Psylla pyri, L., and P. tnali, 

 Forst., were not numerous and consequently did no great damage ; 

 Aphis pomi, de Geer {tnali F.), was present nearly everywhere in 

 orchards ; Aphis gossypii, Glov. {cucumeris, Forbes) did great damage 

 to bachza plants, but washing with an extract of quassia with soap 

 gave excellent results against it, as well as against Aphis brassicae, L. ; 

 Myzus cerasi, F. ; Macrosiphum (Siphonophora) pisi, Kalt., in lucerne 

 fields. 



Diptera : Chortophila brassicae, Bouche ; Hylemyia antiqua, Meig. ; 

 Oscinella {Oscinis) frit, L. ; Tipula oleracea, L., injured cabbages but 

 was largely infested with Tachinids. 



Hyraenoptera : Cimbex femorata, L. {betulae, Zadd.), frequently 

 found on young birch trees ; Arge {Hylotoma) berberidis, Klug, in 

 some localities defoliated bushes of barberry ; Hylotoma rosarum, L. ; 

 Pteronus {Nenmtus) salicis, L. ; Croesus {Nenuitus) septentrionnlis, L. ; 

 Trichiocampus {Cladius) viminalis, F., on poplars ; Emphytus grossu- 

 lariae, Gl., two generations of which occurred between the end of June 

 and the middle of September, was found both on red and white 

 currants ; spraying with Paris green proved very effective ; Lophyrns 

 pini, L., is very injurioas to yomig (4-8 year old) plantations ; crushing 

 the larva e with gloved hands proved very effective ; when the numbers 

 are small, spraying with barium chloride (5 lb. in 27 gallons of water) 

 may be used ; Athalia spinarum, F., injured mustard in the district 

 of Kupjansk ; Eriocamjwides limacina, L., [Eriocampa adumbrata, 

 Klug) was found in quantity on cherries ; Ardis {Blennocampa) 

 bipunctata, KL, injured young shoots of roses : Hoplocampa fuhn- 

 cornis, Klug, was found sporadically, some orchards being totally 



(C172) ^ 



