611 



all the larvae. Gipsy moth tree-banding material brought about the 

 greatest reduction in the number of larvae in a tree, and best with- 

 stood weather conditions and tree growth. Paradichlorobenzene gives 

 promise of becoming a valuable insecticide for this pest, and much 

 of the information here summarised has already been noticed [R.A.E., 

 A, viii, 189 ; ix, 325]. Application is best made after all the eggs 

 have hatched, in the north after 15th September and in the south 

 immediately after the 1st October. Applications made late in August 

 or early in September kill the larvae but do not prevent the entrance 

 of newly-hatched individuals. If an application is to be made early 

 in the season, the best time is from 1st May to 15th June. 



Froggatt (W. W.). French Bean Fly {Agwmvza phaseoli). — Agric. 

 Gaz. N.S.W., Sydney, xxxiii, pt. 8, 1st August 1922, p. 552. 



The eggs of Agromyza phaseoli, Coq. (French bean fly) are laid in 

 the stem of French beans, where the larvae feed and cause decay. 

 Suggested remedies are banking the beans with earth right up to 

 the stem, so that the action of the fly is checked and the beans throw 

 out fresh roots above the damaged portion ; and clean cultivation 

 and the removal and destruction by fire of all old bean stalks when 

 the crops are gathered. 



Watson (E. B.). The Food Habits of Wasps {Vespa).—BuU. Cliamb. 

 Hortic, London, i, no. 2, October 1922, pp. 26-31, 5 figs. 



The food of Vespa spp. consists largely of Diptera. One observation 

 on a colony of about 60 workers showed 227 flies to be brought to 

 the nest within an hour. In another nest examined about 90 per cent, 

 of the flies brought in were Muscids. Larvae of Pteromis {Nejuatits) 

 ribesii (gooseberry sawfly) are also attacked by both queen and worker 

 wasps. Insects that were eagerly devoured by wasps when offered 

 to them included blue-bottles and other Muscids, Tipulids, and Jassids. 

 Wasps should undoubtedly be regarded as beneficial insects and should 

 be protected. 



Bentley (G. M.). The Mexican Bean Beetle a new and serious Pest in 

 Tennessee. — Tennessee State Bd. Ent., Kiw.xville, Bull. 41 

 (xi, no. 2), June 1922, 15 pp., 13 figs. [Received 12th October 

 1922.] 



Ovv'ing to the continued spread of the Mexican bean beetle, Epilachna 

 cornipta, Muls., a brief and popular account is given of its appearance 

 in various stages and of its habits. Hand-picking and dusting with 

 1 part calcium arsenate and 9 parts hydrated lime or with 1 part 

 sulphur and 4 parts hydrated lime should be carried out as soon as 

 the pest is found. 



MacLennan (A. H.). New Methods developed in Control of Insects 

 and Fungus Diseases. — 17th Ann. Kept. Ontario Veg. Groioers' 

 Assoc, 1921, Toronto, 1922, pp. 32-38. 



Work on the cabbage root maggot [Phorhia brassicae, Bch.] has 

 confirmed the efficacy of the treatments previously suggested [R.A.E., 

 A, ix, 127, 128, 372]. In conjunction with Prof. Caesar, a good deal 

 of further information regarding this pest was obtained. There are 

 three generations, and a partial fourth one in a 3'ear. Oviposition 



