514 SEVENTH REPORT OF THE FOREST, FISH AND GAME COMMISSION. 



deposited in small notches along the sides of the brood chambers and from one 

 to two other females are admitted to this central chamber, and they start galleries 

 in other directions. The eggs begin to hatch before the galleries are completed 

 and the grubs barrow in the inner bark on which the)- feed. This is soon filled 

 with grubs of various sizes and by the time all the eggs are hatched, the inner 

 bark within, for a radius of from 2 to 4 inches, is completelj' riddled by galleries. 

 The grubs on attaining full growth enlarge the ends of their burrows and form cells 

 in which the final transformations take place. The beetles may cither emerge from 

 the bark shortly and start a second brood or remain in this retreat till the follow- 

 ing spring. Dr. Hopkins states that two or three broods may occur in one season 



FIG, 14. SPRUCE BARK RATHER BADLY 

 EATEN BY POL VCRAPIIUS KUF/PEXXIS. 



ORIGIMAL. 



''ZW^ 



FIG. 15. SPRUCE BARK B.ADLY EATEN 

 BY rOLYGRAPHUS RUFIPEXNIS. 



ORIGINAL. 



and his observations lead him to believe that owing to the shortness of the season 

 and the high elevations occupied by the spruce in West \'irginia, there is generally 

 but one generation annually. 



Description. The beetle varies from light brown to black. It is quite small, 

 being about »,, of an inch long and rather stout. The head is thickly and finely 

 punctured and nearly concealed by the overhanging prothora.x. The mouth parts 

 are tipped with black and the concolorous, coarsely granulated eyes are divided, the 

 two portions being connected by a smooth strip of chitin. The prothora.x is much 

 narrowed in front, is thickly and finely punctured and the wing covers or elytra are 



