18 
NOTES OF OBSERVATIONS 
Norwich, and at Little Ilford, Essex, the Onions suffered much from 
the Maggot, and the Onion bed in my own garden near Islewortli was 
the most complete failure I ever met with. I attribute this in part to 
the ground, which is a stiff loam, not being sufficiently cultivated and 
manured beforehand; also, I feel doubts as to the desirableness of 
guano as a stimulant. Being anxious to experiment on the matter, I 
applied it liberally as a watering, or occasionally as a dry sprinkling 
along the rows, washed in by watering; and following on this the 
attack commenced, and was excessively severe. 
Tet maxis Onopordinis. 
8. Tephritis Onopordinis. Celery Fly. The worst attack 
observed of this Fly was reported by Mr. Glenny, who forwarded 
specimens of injured leaves from Barking, Essex, on the 16tli of 
September. On the first signs of insect presence the infested portions 
had been picked off, and it was hoped further damage had been 
prevented, but about the beginning of September a new attack took 
place, and the Celery was spoilt for the year. At New Malden, 
Surrey, Mr. J. Dobson, jun., notes that the larvae were very plentiful 
in the same situation as last season, and that pinching the Grubs in 
the leaves, which was then tried, proved of little use as a remedy. 
This year he had each plant examined when transplanting, and all 
pieces infested by Maggot snipped out with a pair of scissors. 
Another examination was made three weeks later, accompanied by a 
similar trimming, and the Celery growth was pressed on by good 
treatment. The result was “ a better crop could not be wished for.” 
In my garden near Islewortli (in which neighbourhood the Celery 
