70 



In discussing the synonomy of this species it is pointed out that 

 the variety of this insect that has been recorded under the name 

 'pusilla is not the true 0. piisilla of Meigen. This variety has been 

 recorded on the Continent as attacking only rye in the winter 

 generation and only the panicles of oats in the summer one. 



The parasites of the frit-fly include Sigalphns cmidatus, Pferomalus 

 puparvm, P. micans, Rhoptotneris 2vildhami, Tricliomanus crisfafus, 

 Polyscytus oscinidis, Merisiis intermedins, Seniiotellus nigripes, and 

 Miris dolobmtus. 



It is the universal opinion that late-sown spring crops are most 

 afiected, the date of the beginning of the dangerous period being 

 probably dependent on the weather. Spring corn sown before 

 the end of March is usually not attacked ; occasionally it may 

 be safe to sow up to the middle of April on a good tilth, but after that 

 date attack is very probable in infested districts. Reports of bad 

 frit-fly attack on crops " after grass " are common both in this country 

 and in Canada. It must be remembered that some of the reported 

 attacks on wheat may have been due to Hylemyia coardata, damage 

 by which much resembles that of 0. frit. Attention has also been 

 called to the possibihty of infested seeds acting as a source of infection. 



The only remedies are early sowing and stimulation of early growth. 

 The best time for sowing probably varies with the season, but crops 

 sown early in March usually enjoy immunity from attack. Ammonium 

 sulphate and sodium nitrate appear to be two of the best top-dressings 

 for young oats, and it has been specially noted that sodium nitrate, 

 applied as soon as the oats were through, gave better results in a dry 

 season than ammonium sulphate apphed when oats were drilled. 

 Fields should be kept clean of grass, and grass borders round fields 

 and grass edgings to field roads should be destroyed. 



Morris (H. M.). The Larval and Pupal Stages of Scatopse notata, L. — 

 Ann. App. Biol., Cambridge, v, no. 2, October 1918, pp. 102-108, 

 7 figs., 1 plate. [Received 14th December 1918.] 



The larva and pupa of Scatopse notata. L., are here described from 

 larvae obtained in Cheshire at the end of October 1917, in the decaying 

 remains of a wasp's nest. The pupal stage was found to last about 

 14 days. 



Green (E. E.). A List of Coecidae affecting various Genera of Plants. 

 — Ann. App. Biol., Cambridge, v, no. 2, October 1918, pp. 143- 

 156. [Received 14th December 1918.] 



This paper forms the third part of the author's valuable list of 

 Coccids and their food-plants [see this Revieiv, Ser. A, v, p. 519 & vi, 

 p. 281]. 



Bevan (W.). To Potato Growers' and Merchants. — Cyprus Agric. Jl., 

 Nicosia, xiv, no. 4, October 1918, pp. 85-86. [Received 13th 

 December 1918.] 



In several parts of Cyprus potatoes have been attacked by a moth, 

 Phthorimaea opercidella {Lita solanella), which lays its eggs in the 

 eyes or buds of the tubers, into which the larvae burrow. It is a 



