54 
CORN. 
The maggot turns to a small brown chrysalis on the injured stem 
beneath the sheatliing-leaf. From these chrysalids the flies come out 
in autumn, and sometimes may be found in vast numbers in newly- 
stacked Barley. 
From German observations it appears that the flies lay their eggs 
in the young autumn-corn plant, and in these the maggots feed, the 
flies from these coming out at the right season to start the summer 
attack on the growing corn, as mentioned above. 
We much need more observations as to where the winter brood lives 
in the country, as it is this which mainly keeps up the pest to attack 
the summer crops. We should then know how to check attack. At 
present, as we do not know of its presence till the mischief is begun, 
but little can he done in the way of prevention. 
Corn Sawfly. Cephas pygmceus , Curtis, 
1, 2, Sawfly, with nat. size ; 3, stem containing maggot; 4, 5, maggot, nat. size 
and mag.; 6, 7, parasite fly, Pachymerus calcitrator, mag., with nat. size. 
Some amount of attack of Corn Sawfly occurred last year, but not 
enough to require any very special mention, as the subject has often 
been entered on before in these Reports. 
The fly is of the shape figured above, with four wings, and of a 
yellow colour banded with black. The injuries it gives rise to may be 
easily known by looking within the attacked straw. Here the small 
legless, or almost legless, pale yellowish-coloured maggot, with its pale 
brown head armed with minute jaws, will be found feeding within the 
