INJURIOUS INSECTS. 251 



of the thorax, rusty yellow, and two black elevated dots on the 

 middle of the thorax, and a third dot on the hinder edge close to 

 the scutel ; wing covers are coarsely punctured, in rows on the 

 top, and irregularly on the sides and tips, each of which is slightly 

 notched, and ends with two little points.* 



Observations. This insect finishes its transformation towards 

 the end of July, and lays its eggs early in August, one by one, on 

 the stems of the blackberry or raspberry. The grubs burrow 

 directly into the pith. The plant withers and dies the same sum- 

 mer. 



S. hivittata. — Fig. 7. Upper side of the body marked 

 with two white longitudinal stripes, between three of a light brown 

 color ; face, antennae, under side of the body, and legs, white. 



Observatio7is. This insect is the great pest of the apple tree, 

 quince, mountain ash, hawthorn, and shadbush. The larva have 

 been found in the trunks of all these trees, and the insect itself 

 feeding upon their leaves. 



That our readers may see the importance of watchfulness over 

 their orchards, we subjoin a few extracts of a letter of the late 

 Jesse Buel, upon this pest, of May, 1825. 



Mr. Buel says that he was sent for a few days ago, by Mr- 

 Heartt, of Troy, to witness the devastation made in a fine young 

 orchard, by a grub hitherto unknown to farmers, and which cor- 

 rectly to know, and to be able to guard against, is a matter of 

 great public interest. 



It appears from this letter, that the orchard was injured much 

 more seriously in that part which had a warm southern exposure 

 and was situated upon a steep declivity. The whole damage which 

 was done to this single orchard, was estimated by Mr. Heartt. the 

 owner, at $2,000. 



The larva, in this instance, entered the sap-wood just beneath 

 I the surface, and then cut its way upwards. The grub, after having 

 undergone its transformation, which requires about three years, 

 escaped through the bark by a perforation about thirteen inches 

 above the surface. Sometimes they were so numerous in a single 

 Itree as to destroy the whole circle of sap-wood. 



•A large proportion of the specific descriptions ami observations are copied directly 

 from Harris' Massachusetts Report. The editor has no merit, except in giving ac- 

 curate figures of the insects. 



