489 



showing 21 per cent, of parasitised individuals on spring wheat and 

 none on lucerne. Less important parasites are a Hymenopteron, 

 Zele sp., and the Tachinids, Peleteria robusta, Wied., and Ernestia 

 radiciim, F. It is thought that with more complete knowledge of 

 the life-histories, particularly of the Tachinids, it may be possible to 

 encourage their increase by the selection of favourable crops and a 

 consideration of the most advantageous dates of sowing. 



BucKELL (E. R.). Locust Control. — British Columbia Dept. Agric, 

 Victoria, Circ. 63 (New Hortic. Ser.), June 1921, 12 pp., 8 figs. 



The species of locusts most injurious to range land, vegetable crops 

 and fruit-trees in British Columbia are Camnula pelhicida, Melanoplus 

 atlantis and Platybothrus brimneus on range lands, and M . femur-rubrum 

 and M. bivittatus in the more humid districts. The preparation of 

 poison bait according to the Kansas formula is described, with a suit- 

 able canvas bag fitted with a metal spout for distributing it. A useful 

 machine for catching grasshoppers, as well as the usual hopperdozers, 

 is described and illustrated. Neither of these measures is practicable 

 on the large areas of range land, which are very thinly populated and 

 where overgrazing frequently occurs. Careful preservation of the 

 ranges by fencing and a system of range rotation will restrict the 

 breeding areas of some of the most injurious species. Fence-rows, 

 roadsides or small areas of waste land on dry farms close to open ranges 

 should be treated promptly, while the hoppers are young, or deeply 

 ploughed before the eggs hatch. On lowland and valley farms locust 

 invasions are comparatively rare, oviposition occurring occasionally 

 on the drier pasture lands and on old clover and lucerne fields. These 

 should be ploughed at least six inches deep after the eggs are laid in 

 autumn or before they hatch in spring. The importance of co-operation 

 in any anti-locust measures is emphasised. 



FuLLAWAY (D. T.). Fig Insect Investigations. — Hawaiian Forester & 

 Agric., Honolulu, xviii, no. 6, June 1921, pp. 139-143. 



An account is given of a journey to China and India with a view 

 to ascertaining the most suitable species of Ficus to introduce into 

 Hawaii for the purpose of reafforestation. The method of shipping 

 Ficus retusa containing fig wasps is discussed. 



During these investigations an attempt was also made to secure the 

 fruit-fly parasite, Syniomosphyrtim indicum, from India, but none were 

 obtainable. 



Zum Flug der Sauerwurmmotten. [On the Vine Moths of the Second 

 Generation.] — Luxemburger Weinztg., Grevenmacher, ix, no. 16, 

 6th August 1921, pp. 191-192. 



The second generation of the vine-moths [Clysia amhiguella, Hb., 

 and Polychrosis botrana, Schiff.] appears to have been very unevenly 

 distributed among the vineyards in Luxemburg in 1921. In one 

 locality only two moths have been taken in spite of the fact that the 

 first generation was numerous. 



(4286) 2 K 



