OF INJURIOUS INSECTS. 
29 
reported by Mr. Grierson as very prevalent in the Isle of Mull, where 
several patches had to he re-sown. The failure was ascribed to the 
dry weather. A slight attack of Fly is reported by Mr. Brunton as 
occurring at Glenann, Co. Antrim, Ireland. At Guildford; atMaldon; 
and at Exeter the absence of Fly is noted. Mr. Long mentions that 
at Henlow, Herts, the Turnip Fly has not been injurious this season, 
and that it hardly ever is so when the soil is thoroughly moistened. 
Mr. Wailes, writing from Beacon Banks, Easingfold, Yorkshire, 
mentions that Fly is caught by wheeling a board (to cover two rows) 
painted with treacle or some similarly sticky substance, so that the 
Fly leaping from the leaves on disturbance adheres to the surface, and 
is killed. Mr. Wailes also draws attention to the importance of the 
plant being pushed into vigour by good manuring, and notes that the 
Fly does not thrive in blowy, rainy weather. 
Athalia spinarum. 
Sawfly, larva and pupa. 
15. Athalia spinanim. Turnip Sawfly; Niggers; Black Palmer. 
Mr. Service notes that this is rarely injurious in the neighbourhood of 
Maxwelltown, but that he has often met with the insect when col¬ 
lecting, and has met with it during this summer as usual. Dusting 
with caustic-lime is mentioned as a good remedy by Mr. Dunn. Mr. 
Hart notes that he has used sheep and lambs with good effect in an 
attack of “ Niggers ” on Turnips in August. About 100 of them were 
driven backwards and forwards for an hour three days in succession, 
which quite cleared the plants, and did no injury to the animals. 
This attack is noted by Mr. Hart as the only one he ever had to deal 
with, and he tried several recommendations before resorting to the 
“ droving,” but they were all useless. 
16. Aphis rapae. Turnip Aphis. Mr. Malcolm Dunn notes that 
this was rather plentiful at Dalkeith in dry weather, but soon dis- 
apjieared. 
