NOTES OF OBSERVATIONS 
OF 
INJURIOUS INSECTS 
AND 
COMMON CROP PESTS 
During 1883. 
I 
APPLE. 
Apple Sawfly. Tenthredo testudinea, Stepk.; Hoplocampa testudinea , 
Cameron. 
The attack of Apple Sawfly caterpillars has not often been recorded, 
but is sometimes the cause of much mischief in the first stage of the 
crop, by means of the caterpillars feeding inside the young forming 
Apples. 
On June 25th I found many small Apples, under trees from which 
they had fallen, in my garden near Isleworth. Some of the Apples 
were about an inch long, many were smaller. Most of the larger ones 
had a blackish mark on them on one side, or near the stem, and, on 
opening them, the inside was found to have been eaten away, so as to 
form a hollowed-out chamber from the mark or hole in the side to the 
centre and some way past it. This was filled with decayed matter 
formed of the gnawed pulp of the young Apple, and in this decayed 
matter there was in many cases one Sawfly caterpillar. 
These were of various sizes (the largest about half an inch long), 
whitish, with a pinkish streak along the centre of the back. The 
largest specimen did not show the streak, very possibly from coloured 
matter in the food-canal having been discharged. The caterpillars 
are distinguished from Moth and Beetle grubs by having six pairs of 
sucker feet beneath the body , besides the pair at the end of the tail, and 
the three pairs of regular claw feet. 
B 
