43 



and a half or more in length, and nearly as thick as the little finger. 

 Before transforming they line their burrows with a web of silk, and 

 return to the interior or some distance from the external opening, 

 spin an imperfect cocoon, in which they assume and pass the pupa 

 state. The pupa is an inch and a half or two inches long, of an am- 

 ber color, changing to brown in front; on the upper side of each ab- 

 dominal ring are two transverse rows of toothlike projections. By 

 means of these the pupa just before transforming to the moth, works 

 its way to the mouth of the burrow, so that the perfect insect may 

 escape; which usually occurs in the latter part of June or the first 

 part of July. 



The eggs are doubtless deposited sometime in July, and are of a 

 dark brown or somewhat purplish color. The ovipositor of the female 

 being extensile, she is enabled to place them in the deeper cracks 

 and crevices of the bark. The young worms which hatch from them 

 are dark brown witti large heads. They are active and commence 

 spinning as soon as they are hatched. 



A LIST 



of the various borers herein mentioned with the names and parts of 

 the plants they injure. Those with b prefixed operate in the per- 

 fect or beetle state, all the rest in the larva state : 



Chryspbothris femorata — Bores into the trunk of the apple, peach, 

 pear, plum, cherry, soft maple, white oak, box elder, mountain ash, 

 beech and hickory. 



Dicerca divaricaca — Bores into the wild and cultivated cherry trees, 

 peach tree and beech. 



Dicerca lurida — Bores into the hickory tree. 



Agrilus ruffcollis — Bores into the raspberry and blackberry canes. 



Agrihts lateralis — Not known positively in what plant the larva 

 lives. 



b. Amphicerus bicandatus — The perfect insect bores into the axles of 

 the twigs of the apple, grape, pear and peach. 



Sinoxy.on Casilaris — Bores into the trunk and probably branches of 

 the hickory, apple and peach trees and grape vines. 



Fandeleteins hilaris — Bores into the white oak. 



Magdalis armicollis — The elm tree bark-miner and borer. 



Hylobius pales — Bark-miner of the pine tree. 



Pissodes strobi — Bores into the young shoots of the white pine. 



Analcis fragarise — Bores into the crown and stem of the strawberry 

 plant. 



Scnlytus 4 spinosus — Bores into various hickories. 



Hylurgv,s tenebrans — Bores into the inner bark of pine trees. 



Hylvrgus dentatus — Bores into the red cedar. 



Priouus imbricornis — Root-borer, found in the roots of the grape vine. 



P.ionus laticollis — Root-borer, especially roots of the grape vine. 



Callidum amoenum — Bores under the bark of the pine. 



Chion ductus — Bores into the trunk of the hickory. 



Eburia quadrigemiuata — Bores into the honey locust. 



Elaphidion villosum — Bores into the twigs of the black and white oaks, 

 and probably the apple tree. 



