542 



on poisoning larvae of Haltica oleracea and Athalia spinarutn with 

 acid lead chromate gave negative results [see this Review, Ser. A, iii, 

 p. 109]. The following pests are dealt with in the report : — 



Pests of sugar-beet. Coleoptera : Bothynoderes punctiventris. Germ., 

 not numerous ; the larvae of Otiorrhynchus ligustici, L. , which were 

 also found in large numbers on roots of clover ; to the list of the food- 

 plants of this pest [see this Review, Ser. A, ii, p. 465] should be added, 

 according to Kirchner, the following : —rye, barley, peas and straw- 

 berries ; Tanymecus palliatus, F. ; Liparus coronatus, Goeze ; Gas- 

 troidea polygoni, L., is sometimes found on sugar-beet and it is thought 

 that the Histerid, Saprinus virescens, Payk., destroys its eggs and 

 larvae. The Silphid, Thanatophilus sinuatus, F., has not been 

 previously reported as a pest of sugar-beet, though T. rugosus, L., is 

 recorded by Theobald ; the larvae of these beetles were observed to 

 eat seedhngs of red beet and of Chenopodiimi album ; a 5 or 6 per cent, 

 solution of barium chloride is very effective against them. According 

 to Petrushtchinsky, Agriofes lineatus, L., may be controlled by rolling 

 the soil and by applying kainit and saltpetre. Pentodon idiota, 

 Hbst., is included in the hst of pests of beet, on the strength of the 

 statement of S. A. Mokrzecki and I. M. Shtchegolev [see this Review, 

 Ser. A, i, p. 357]. With regard to Podonta nigrita, ¥., in addition to 

 the author's own observations [see this Review, Ser. A, iii, p. 93], it 

 has also been recorded by Portchinsky [see this Review, Ser. A, iii, 

 p. 483], by Krassilstchick in Bessarabia, by Uvarov in Stavropol on 

 flowering grain, and by Sochatzky in Kiev, and probably it also occurs 

 in Cherson, Taurida and the province of the Don. 



Lepidoptera : Phlyctaenodes sticticalis appeared very early, on 12th 

 May, but was not numerous. Phytometra (Plusia) gamma, L., occurred 

 in small numbers in the middle of September ; its caterpillars were 

 largely infested with Litomastix truncatellus, Dalm., and its eggs by 

 Telenomus phalaenarum, Nees. According to Standfuss, they are also 

 infested with the fungi, Empusa muscae, Cohn, and according to Ludwig, 

 by Empusa plusiae, Giard, which is carried by a mite, resembhng 

 Tyroglyphus mycetophagus. Acronycta rumicis, L., is recorded as a 

 pest of sugar-beet on the strength of the statement of Ochsenheimer ; 

 in the Baltic provinces there is only one generation of these insects, 

 the moths being on the wing in May and June. In the greater 

 part of Europe, in Siberia and Central Asia, there is a second 

 generation in Jul}'' and August, while in Bukovina there are three 

 generations, in April, June and August. 



Rhynchota : Eulecanium robinarium, Douglas, was only observed 

 in small numbers, probably owing to its numerous enemies and para- 

 sites, which include the beetle, Anihribusvariexjatus, Geoffr. {varius, F.), 

 and the Chalcids, Coccophagus scutellaris, Nees, and Aphelinus 

 (Coccobius), scutellaris, Dalm. The eggs of Aphis rumicis 

 {papaveris, F.) winter on Yiburnum opulus, Philadelphus coronarius, 

 Euonymus europaea and E. japonica, but in warm winters may also 

 occur on beets remaining in the field after the harvests. The aphids 

 do not appear on beet before May. Macrosiphum circumflexum, 

 Buckton, occurred on beet grown in the laboratory. Figures of 

 wingless and winged viviparous females of this species are given. 

 Adelphocoris lineolatus, Goeze, and Lygus pratensis, L., var. campestris. 

 Fall., were observed in August to be feeding on the flower buds of a 



