infesting indigenous fruit trees. 
THE HICKORY. 
AFFECTING THE TRUNK AND LIMBS. 
Boring large holes, lengthwise in the heart-wood; a long, soft, whitish, flattened 
grub. 
The Tioee Cekambyx. Monohammus tigrinus , De (See*. M . tomentosui , 
Zeiolek. 
The insect which we are now about to consider is one of the 
largest and finest of our American insects pertaining to the family 
Cerambycipje or Long-horned beetles. Hitherto it has not been 
known in what kind of wood the larva ot this species occurred. 
Indeed, the insect itself is rarely met with in collections, having 
been captured only in the State of Pennsylvania. But from the 
numbefs of its burrows, which I find in almost every hickory and 
walnut tree which I have had an opportunity of examining, I am 
impressed with the belief that this is a much more common insect 
than has been hitherto supposed, and now that the trees which it 
flreqents are known, it will probably be readily found, over a con¬ 
siderable extent of our country. 
Some hickories and bitter walnuts which were split for fuel at 
my door, gave me opportunities for observing the extensive exca¬ 
vations made by this borer and by the ants next to be noticed, 
which take up their residence in the burrows which this worm 
forms. The trees alluded to had stood solitary in the open fields, 
a situation in which all trees are much more liable to be infested 
with insects than when growing together in forests. And though 
to external appearance, these trees were sound and healthy, they 
