liNFESTING INDIGENOUS FRUIT TKEES. 



THE HICKOKY. 



AFFECTING THE TKUNK AND LIMBS. 



Boring large holes, lengthwise in the heart-wood ; a long, soft, whitish, flattened 



grub. 

 The Tiger Cerambtx. Monohammus tigrinus, De Geeb. M. tomentosus, 



Zeiglek. 



The insect which we are now about to consider is one of the 

 largest and finest of our American insects pertaining to the family 

 Cerambvcid^ or Long-horned beetles. Hitherto it has not been 

 known in what kind of wood the larva of 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 

 numbers 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 

 freqents 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 



