87 



appear to have played the chief role, the Braconid, Meteorus albidi- 

 tarsis, being the most important. Its attack takes place before the 

 host caterpillar is half-grown, and its larva leaves the caterpillar before 

 the latter pupates, spins a cocoon and hibernates, pupating in the 

 following spring. After a pupal period of 14 days the adult Braconid 

 emerges. Ichneumon pachymenis also parasitises the pine moth in the 

 latter's larval stage, but towards its end, and the parasite larva pupates 

 within the host cocoon after feeding on its contents. 



It is remarkable that M. albiditarsis is almost unknown outside 

 Holland as a parasite of P. flammea, and that parasites well known 

 elsewhere are either scarce or altogether absent in Holland. 



Most of the parasitic Diptera observed in 1919 were Panzeria 

 ritdis, and in localities where these flies were numerous, the parasitic 

 Hymenoptera were present only in small numbers. 



ScHOEVERS (T. A. C). Wintervlinderbestrijding. [Measures against 

 Cheimatobia brumala, L.] — Tijdschr. Plantenziekten, Wageningen, 

 x.xvi, no. 11, November 1920," p. 212. 



Banding is the best method of combating the winter moth, Cheima- 

 tobia briimata, L. Failing this, recourse may be had to thorough 

 spraying with 8 per cent, carbolineum in Februarys or March, or 

 spraying with Paris green (or other arsenical spray) as soon as injury 

 is noticed. 



La Convenzione Internazionale per I'Organizzazione della Lotta contro 

 le Cavalette. [The International Convention for Organising 

 Measures against Locusts.] — L'Agric. Colon., Florence, xiv, no. 11, 

 November 1920, pp. 500-502. 



This Convention met from 28th to 31st October 1920 at the Inter- 

 national Institute of Agriculture in Rome, delegates being present 

 from some 26 different countries. 



An agreement was drawn up, and has already been signed by a 

 number of the countries concerned, by which the contracting States 

 undertake to combat locusts capable of causing losses to neighbouring 

 signatory States and to inform the latter at once of the movements 

 of such locusts. Special agreements are permissible between any of the 

 States that wish to take combined action. The International Institute 

 of Agriculture at Rome is to be recognised as the official centre for 

 records and publications concerning anti-locust work, and the signatory 

 States bind themselves to furnish the Institute once a year (or more 

 often as circumstances may require) with authoritative information of 

 a technical, scientific, legislative, and administrative character ; the 

 Institute is to givT the widest and most speedy publicity to such 

 information. Any proposal made by a signatory State tending to modify 

 this present convention must be communicated to the Institute and 

 submitted by the latter to a conference of delegates from the contracting 

 countries, the conference being called at the time that a general meeting 

 of the Institute is being held ; the proposals made by the delegates 

 must then be submitted for the approval of the contracting States. 

 The present convention is to be signed and ratified as soon as possible, 

 and the ratifications are to be delivered to the Italian Go\-ernment, 

 which will communicate the fact to the other contracting States 

 and to the Institute. Any State, Dominion, or self-go\'erning Colony 

 that has not \^et signed the convention may do so, and colcMiies may 

 be admitted under the same conditions as apply to independent States, 



