387 



FoRSius (R.). Kleinere Mitteilungen uber Tenthredinoiden. [Minor 

 Communications on Tcnthi-edimds.]—Meddel. Soc. Flora et Fauna 

 Fennica, Helsingfors, no. 45, 1920, pp. 165-169. 



FoRSius (R.) . Kleinere Beitrage zur Kenntnis der Tenthredinoideneier. 



[Minor Contributions to the Knowledge of the Eggs of Tenthre- 

 dinids.]— Ibidem, pp. 169-184, with figs. (Abstracts in Wiener 

 Landw. Ztg., 1921, no. 32-33.) 



Many notes of galls on willows caused by sawfiies are given. 



The largest eggs are those of Acantholyda pinivora, a pest of pine. 

 Those of Lophyrus sertifer and a few other species are able to withstand 

 such low temperatures as — 30° C. (- 22° F.). Sexual reproduction is 

 usual, but parthenogenesis may occur. The eggs are destroyed by 

 Acarids, bugs, and parasitic Hymenoptera. 



FoRsius (R.) . Zur Kenntnis einiger Blattwespen und Blattwespenlarven. 



[A Contribution to the Knowledge of some Sawfiies and Sawfly 



Larvae.] — Meddel. Soc. Flora et Fauna Fennica, Helsingfors, 



no. 45, 1920, pp. 106-115. (Abstract in Wiener Landw. Ztg., 1921, 



no. 32-33.) 



In Finland many species of sawflies injure Alniis, Betula and Salix. 



The larvae of Amauronematus forsius, EnsL, often completely defoliate 



Salix aurita. Lophvrus fuscipennis, Fs., oviposits on the needles of 



Picea excelsa. Thelarva of Pamphilius depressus, Schr. [vafer, Zett.), 



eats holes in the leaves of Betida verrucosa and rolls them up. Two 



species attack Geranium silvaticum, and others injure Rumex 



domesticus, Rosa and Spiraea. Calameuta filiformis, Eversm., occurs 



on oats in Finland, never on reeds. 



MuLLER (H. C.) & ]\IoLZ (F.). Weitere Versuche zur BekampJung 

 der Riibennematoden [Heterodera schactii, A. Schmidt) mittels 

 des abgeanderten Fangpflanzenverfahrens. [Further Experiments 

 in combating H. schachtii by means of the modified Trap Plant 

 Uei\\od.'\— Landw. Jahrhiicher, liv, no. 5, pp. 747-768. (Abstract 

 in Wiener Landw. Ztg., 1921, no. 32-33.) 



Trap plants for the Nematode, Heterodera schachtii, Schmidt, may 

 be killed by a 30 per cent, solution of iron sulphate. The first trap 

 crop must be sown before cereals, and two others after harvesting. 

 After the iron sulphate has destroyed all the aerial parts of the plants, 

 the Nematodes continue to develop for some time in the roots, but 

 no eggs are produced. 



ScH^iiiDT (H. W.). Die Schnellkafer. Biologische Beobachtungen an 



Agriotes lineatus, L. — Mitt. Deutsch. Landw. Ges., 1921, no. 1, 

 pp. 9-10. (Abstract in Wiener Landw. Ztg., 1921, no. 32-33.) 



In one part of a potato field wireworms, Agriotes lineatus, L., did 

 no damage, whereas severe injury was observed in another portion. 

 The former had been previously planted with horse-radish, while 

 vetches had been grown on the latter. To combat A. lineatus the 

 ground must be ploughed repeatedly, and this operation must not be 

 followed by crops with succulent roots or tubers, or by wheat. ]\Iustard, 

 horse-radish or woad are, however, suitable. 



