MANGOLD AND BEET FLY. 
63 
of a yellow or rusty colour. The end of the tail is bluish, from the 
digested food showing through the skin, and is somewhat enlarged so 
as to have a swollen appearance. The chrysalis or pupa is like the 
perfect beetle, with the forming limbs folded below it. 
The Cockchafer in England, and various kinds of Chafers in 
Canada, Ceylon, and other parts of the British possessions, are so 
destructive in their grub-state that any information of practical methods 
of keeping them in check would be very serviceable. 
With regard to the powers of destruction of an individual grub, I 
found by experiment that one about three-quarters grown, placed with 
an uninjured Mangold root, had by the following morning gnawed a 
hole half an inch across and three-eighths deep; by the following 
morning it was large enough for the grub to lie in ; and on the next 
day the burrow had been so far extended under the rind that the grub 
was out of sight, having thus cleared out a burrow about an inch 
and a quarter or more in length, and half an inch across in about 
three days. 
From experiment made with a mixture of mineral oil (kerosine) 
and soft-soap, it was plain the grub could go down into the ground 
quite fast enough to avoid any harm even from this strong insecticide. 
Shaking down the beetles from trees on to cloths and destroying them, 
or shaking them down to pigs, gets rid of great numbers; but with 
regard to the grubs, no way seems practicable—or at least known of— 
for getting rid of them, excepting disturbing the infested surface of the 
ground, when the grub is near the top, and having these grubs hand¬ 
picked or killed by droves of pigs; or sometimes, amongst tree-roots, 
turning over the surface with stout wooden pegs and clearing the 
grubs, answers well. 
More information is greatly needed. 
Mangold and Beet Fly. Anthomyia Betce , Curtis. 
Anthomyia Bet,e. 
Beet Fly and pupa, mag. and nat. size; head and eggs, mag. 
On the 26th of August I was favoured with the following com¬ 
munication from Mr. Watson Hornsby, of Abbey Town, Holme 
