RIBBON-FOOTED CORN-FLY. 
55 
This attack is demonstrably no new one, but it lias 
b een quite exceptionally severe in the last season, 
owing conjecturally to the exceptional heat and 
d rouglit. 
This “ Ribbon-footed Com Fly ” is a small two¬ 
winged black and yellow fly, of the size figured above, 
and appearance as figured magnified. The injury is 
caused by the maggot hatched from the egg, deposited 
whilst the plant is yet tender, gnawing its way down 
from the ear to the first knot, often causing consider¬ 
able damage to the lowest grains, and frequently so 
stunting the growth that the plant remains low and 
sickly, and without power for the ear to free itself from 
the sheath. But the special mark by which Chlorous 
attack may be known is the long, black, irregular 
furrow showing the track of the maggot outside the 
stem (see accompanying figure). The maggot changes 
to chrysalis on the plant beneath the sheathing leaf 
where it fed, and, as the fly soon emerges, it may 
sometimes be found in legions in fresh stacks of Barley. 
On July 3rd Mr. J. Gf. Mann, writing from The 
Grange, Bishop’s Stortford, Herts, mentioned:— 
“ Chlorous tceniopus swarms in my late Barley, and 
also in my neighbour’s. I also went into North 
Essex and South Cambs. last week, and found it 
there in all the late Barley .... this has done much 
harm. Also on the above day (July 23rd) specimens 
of Barley-ears attacked by Chlorops were sent me by 
Mr. Richard Fowler from Broughton, near Aylesbury, 
Bucks, with a note that the crop was very much 
broken.” 
A.communication was sent to me on July 21st, 
from Wilstead, Bedford, by Mr. James Newman. 
He mentioned:—“I have enclosed in the box some 
ears of Barley, in which you will find an insect eating 
the stem, and also up to the ear and stopping its 
growth; and six more in the small paper parcel, 
taken out of other ears. I find a great many more 
in late-sown Barley than in early-sown.I was 
over a large field of Barley yesterday, thirty acres or 
more, and more than half had stopped growing by 
this insect.” 
On July 26tli a parcel of Barley was forwarded by 
Mr. Towse, of The Avenue, Streatham, showing attack 
Stem of Barley at¬ 
tacked by Chlorops, 
showing blackened 
maggot-channel. 
