42 



THE FRUIT-TREE BARK-BEETLE. 



(Scolyius rugulosus Ratz. — fig. 40.) 



Small circular holes in the bark of fruit trees indicate this insect, 

 known also as the "peach bark-borer" or "shot-hole borer." The 



a 



Fig. AH.—Scolyins rm 



he d 



a, b, beetle; c, pupa; ri, larva; all enlarged. (Chittenden.) 



adult insect, a tinj' black beetle, appears in the latter part of March to 

 the middle of May, and burrows through the bark. Between the bark 

 and sapwood the female makes a burrow and lays her eggs along each 



Fie. a.—Amphiceruit himiiihitus: <i, beetle; 6, pupa; c, larva; d, winter burrow; c, larval galleiy; /, 



work in grape. (Marlatt.) 



side. The young upon hatching bore away from the parental burrow, 

 and in about three weeks are ready to pupate at the end of the galleiy. 



