377 



can be applied. Remedial measures should be continued even when 

 the fly is scarce to prevent its becoming abundant. Commiaity 

 co-operation is essential, as one infested field may furnish enough flies 

 to damage the wheat for several miles round. 



Phillips (E. F.). Control of American Foulbrood U.S. Dept. Agric, 



Washington, D.C., Farmers' Bull. 1084, March 1920, 15 pp., 5 figs. 

 [Received 7th July 1920.] 



This bulletin describes American foulbrood in bees and its symptoms, 

 emphasising the importance of distinguishing tliis disease, caused by 

 Bacillus larvae, a spore-bearmg organism, from European foulbrood. 

 Preventive measures, which will greatly minimise the danger of 

 infection though they will not give complete security, are described 

 together with remedial measures which all involve different methods 

 of removing the bees from the infected hives, and estabhshing them 

 in fresh ones away from the infected combs, honey and other materials. 

 The drugs that have been recommended for this disease are described 

 as useless. 



Haviland (M. D.). Preliminary Note on Antennal Variation in an 

 Aphis (Myzus ribis, Linn.). — Proc. Cnmh. Philosoph. Soc, 

 Cambridge, xx, Pt. 1, June 1920, pp. 35-44. 



Experiments as to the effects on the position of the sensoria on the 

 antennae of the winged parthenogenetic females of Myzus ribis, 

 produced by different foods, e.g. — ^green currant leaves, or currant 

 leaves covered with red blisters from Aphid attack — suggest that the 

 antennae of Myzus ribis are modified according to the food taken, 

 and that the effect in one generation is discernible in the succeeding 

 three or fom*. 



DoDD (A. p.). Notes on the Exotic Proctotrupoidea in the British 

 and Oxford University Museums. — Trans. Ent. Soc, London, 1919, 

 Pts. 3, 4, 15th January 1920, pp. 321-382. [Received 12th 

 July 1920.] 



Among the sixty-three new species described are Hadronotus antestiae 

 and Telenomus truncativentris, bred from the eggs of the coffee-bug, 

 Antestia lineaticollis, in East Africa. 



MuNRo (J, W.). Survey of the Forest Insect Conditions in the British 

 Isles 1919. — Forestry Commission, London, Bull. 2, May 1920, 

 35 pp., 18 figs., 3 plates 1 map. [Received 10th July 1920.] 



The war conditions were particularly favourable to the spread of 

 various forest insect pests [R.A.E., A, yi, 258] in Great Britain and 

 (Ireland, and a prehminary survey of conditions shows that coniferous 

 woods generally are in a most unhealthy condition. In a summary 

 of the results of this survey it is stated that Scots pine woods, and 

 jyoung coniferous plantations on the site of or near felled areas of 

 Scots pine are suffering most. Pure larch, spruce, Douglas fir and 



(701) ~ B 



