814 [Assembly 
timely care. It would appear that tile excessive drouth of the 
past summer and autumn had favored the multiplication of the 
moths which produce these borers, bringing them out in such 
numbers that the roots of all our peach trees were stocked to 
repletion, and the insects were obliged to resort to other kinds of 
trees to dispose of a surplus portion of their eggs, as we shall 
presently see. 
Many intelligent persons, who are acquainted with this insect 
and the Apple tree borer only in their larva states, cannot fully 
persuade themselves that the two are really ^different insects, so 
much do the worms resemble each other in their external appear¬ 
ance and the habit of attacking the trees at the surface of the 
ground. But any one who places them side by side will readily 
perceive that they differ from each other in several important 
particulars. The Peach borer is cylindrical and not broader 
anteriorly, like the Apple tree borer; it has three pairs of small 
feet, whilst the Apple tree borer has none; it has only a few 
scattered coarsish hairs, whilst the Apple tree borer has numerous 
fine shorter ones. Such important differences prove that these 
worms are really distinct. They differ much more widely when 
they come to attain their perfect state. Whilst the Apple tree 
borer is transformed, as we have already seen, to a Long horned 
beetle, the worm of the peach tree changes to a four-winged fly, 
bearing some resemblance to a large wasp, and pertains to the 
Family AIgeriid^; of the Order Lepidoptera. 
This insect was named JEgwia exitiosa or the Destructive Algeria 
by Mr. Say, and was described by him in a communication giving 
an account of its habits by Mr. James Worth, which was pub¬ 
lished in the Journal of the Philadelphia Academy of Natural 
Sciences, (vol. iii. p. 216) in the year 1823. Mr. Worth having 
obtained the winged moths in July supposed this month only was 
the one in which the perfect insect makes its appearance. But 
whoever examines infested roots will find worms upon them of 
all sizes, at all times of the year. ’ Even in the winter small 
worms occur with others which are full grown, showing that these 
last will complete their changes much earlier in the season than 
