252 QUARTERLY JOURNAL. 



The larva are fleshy, whitish grubs, nearly cylindrical, and 

 tapering a little from the first ring to the end of the body ; head 

 small, horny, and brown. It comes forth from the trunks of the 

 trees a perfect insect, like No. 7, early in June, making its escape 

 in the night. In the day time it is at rest among the leaves of the 

 tree which it devours. 



Dr. Harris considers the constant re-appearance of this borer in 

 our orchards and nurseries is owing in a great measure to the care- 

 lessness and inattention of individual owners. Old trees are suf- 

 fered to remain, which are full of the insect in its larva state ; or, 

 they suffer the suckers to choke the base of the tree, and furnish a 

 harbor so long as they remain unpruned. 



Two or three methods have been resorted to for destroying this 

 insect. 1st. By a wire thrust up into its hole. 2d. Cutting it 

 out with a gouge. 3d. Plugging the hole with a piece of soft 

 wood, to which Dr. Harris advises the use of a few grains of cam- 

 phor. The first method is the safest. The gouging, if resorted 

 to, ought to be performed with great care. In all cases, however, 

 the suckers ought to be cut, removed from the field, or burned. 

 The worst of cases we have seen of the ravages of this pest, have 

 been those where the tree has been shaded and choked by suckers. 

 The dampness, together with the exclusion of light, seem peculi- 

 arly favorable for the increase and propagation of this insect. 



tS^. calcarata. — Body covered with a close short nap ; color, fine 

 blue-gray punctured with brown, and with four ochre-yellow lines 

 on the head, and three on top of the thorax ; wing covers tipped 

 with sharp points. 



Observations. This is the largest of our Saperdas. The grubs 

 infest our native, as well as the Lombardy poplar, which last it 

 has nearly destroyed. They are of a yellowish white color, except 

 the upper part of the first segment, which is of a dark buff. When 

 fully grown, they are two inches long ; body thick, and larger 

 before than behind, and consists of twelve segments separated from 

 each other by deep transverse furrows. 



The beetles may be found on the trunks and branches of the 

 various kinds of poplar, in August and September ; they fly by 

 night. (Harris.) 



Gen. clytus. — Body elongated ; antenna^ shorter than the body. 

 Thorax globose, unarmed ; hind legs clavate. 



