XII] Aphides and Sawylies 165 
The maggots are small, curled, wrinkled grubs with a 
definite head. They pupate in the stem just below. the 
cut, and here they remain until the following May, when 
they hatch into sawflies. 
Remedial Measures. 
As the pupae are present in the stubble after harvest, 
means should be taken to destroy them. The stubble 
should be burnt if possible: if not it should be harrowed 
and the plant remains collected and burned. 
The larvae of other sawflies may be found feeding 
on fruit trees. They resemble small caterpillars, but 
may be distinguished from them by the number of 
their legs. In addition to three pairs of true legs they 
possess more than five pairs of false legs, which is a 
greater number than is found in any caterpillars of 
moths and butterflies. 
CHAPTER XIII 
EELWORMS 
Eelworms are not insects but true worms. Some 
of them cause plant diseases and others are present in 
a large number of diseased plants. They are unseg- 
mented worm-like creatures, very small, and never 
reach + inch in length, the majority being about 
gy inch long. For our purpose we may classify them 
as: parasitic forms; free-living forms. 
The former cause plant diseases. The latter are 
always present in decaying roots or stems, and are 
