Gooseberry Grub. 245 
I cannot but regret, that, in Mr. Rennie’s useful paper, 
there is no figure ae P. Napze‘ee ; which ought on no account 
to have been omitted, if a specimen could have been procured 
for the purpose. Perhaps he will favour us with one on some 
future occasion. — W. T. B. 
Art. TX. On the Gooseberry Grub. By E. S. 
Sir, 
As the season is at hand when the gooseberry leaves begin 
to shoot, a few remarks on what is commonly called the erub, 
which commits sad ravages on the foliage of these shoots, may 
not be unacceptable. Early in March, if the weather is 
favourable, the first flies issue from their chrysalis, a few 
inches below the soil, at the foot of the trees; and, by a sharp- 
sighted observer, may be seen about nine or ten o’clock in 
the morning, should the sun be shining, hovering over the 
gooseberry trees; and, every now and then, settling on a leaf, 
vibrating their antenna in bustling action, searching for a 
suitable leaf whereupon to deposit their eggs: and every fly 
destroyed at this period is, therefore, the aleiniate destruction 
of some thousands of voracious successors. If carefully 
watched, after having made choice of a leaf, it will be ob- 
served retiring to the under side; where, in course of time, it 
deposits, along the stronger flores or veins of the leaf, a 
series of eges, “which appear like small pellucid oblong strings 
of delicate beads, following the lines of the foliatory nerves. 
The following observations on the times of hatching, &c., may 
be relied upon as accurate : — On the 9th of April the eggs 
were laid; on the 19th they were hatched; and if the tem- 
perature is mild, they increase rapidly to maturity : and from 
their numbers (for a single fly will fill up the veins of many 
leaves), the foliage of the devoted tree is soon destroyed. 
They usually continue in the larva state about ten days ; when, 
dropping to the earth, they penetrate below the surface, and 
change into a small brown chrysalis ; in which dormant state 
they remain from fourteen to Seventeen days, and then come 
forth as flies, which, in a day or two, lay their respective quan- 
tities ‘of eges ; and, ince: brood after brood is continued inde- 
finitely ; and I am not aware that any limits of season act as a 
check, unless attended with decrease of temperature, which, of 
course, puts a stop to their progress. One mode of guarding 
against the evil I have already noticed, but the most keen- 
sighted gardener can never effect the destaicaont of the ori- 
ginal stock of these vernal progenitors. He should, there- 
fore, from the first moment of seeing the flies hovering about 
his trees, keep a sharp look out on the leayes, particularly 
