43S AmWAl. REPORT OF NEW-YORK 



HTCKOHT. TRT7NK. 



12. THE HICKORY.— Carj/a alba et al 



The several species of hickory and walnut are all preyed upon 

 alike by the same insects with a very few exceptions, and these 

 trees suffer much more from their attacks than any of our other 

 wild fruit trees. In the state of New- York are upwards of sixty 

 insect depredators belonging to these trees. Only a part of these,, 

 however J are yet known to us in their perfect state so that we are 

 able to name and describe them. 



AFFECTING THE TRUNK AND LIMBS. 



151. Tiger Cerambtx, G^oes /ignna, Degeer. (Coleoptera. Cerambycidae.) 



Boring large holes lengthwise in the solid wood, a large cream- 

 yellow grub, slightly tapering, with a faint darker line along the 

 middle of its back, a black head chestnut-brown at its base, and 

 the first ring flattened and pale tawny yellowish; changing to a 

 pupa in the burrow it excavates (as do all other borers of the 

 beetle kind), and producing a long-horned beetle of a brown 

 color covered with incumbent short tawny gray pubescence, more 

 dense on the wing covers, which have a broad dark brown band 

 beyond their middle and another on their base, the thorax with 

 an erect blunt spine on each side, and the antennse pale yellowish 

 with their first joint dark brown. Length about one inch. This 

 is the common borer in all the hickory and walnut trees in my 

 neighborhood. Those species of the old genus Monohammusy in 

 which the feelers are blunt instead of pointed at their ends, have 

 recently been set off into a distinct genus by Dr. Leconte, to 

 which the name Goes is given. See Transactions, 1854, p. 850. 



The annexed cut handsomely illustrates the principal opera- 

 tions of this insect; and those of the Apple-tree borer and other 

 large borers belonging to the family Cerambycidae are closely 

 analogous to this. On the left hand side of the figure near its 

 lower end is seen a small cavity which the parent beetle gnaws 

 through the hard dead outer layers of the bark, and a small perfo- 

 ration through the soft new inner layers. Does the parent drop her 

 egg in the bottom of the cavity which she gnaws, and does the 

 young worm eat its way through the soft inner layers to the 



