New York AGiticuLTURAL Experiment Station. 275 



were placed upon the trunk and allowed to crawl about. Nearly. 

 all of tliem selected rough places in the bark and immediately 

 began to burrow in. Second, twenty beetles were placed near 

 the ends of the small limbs and prevented from escaping by glass 

 flasks placed over the ends and stopped with a plug of cotton 

 wrapped about the limb. In most cases the bottom of the flask 

 was broken out and a fine wire net fastened over to allow circu- 

 lation of air and prevent accumulation of moisture on the inside 

 of the glass. Third, sixty-seven beetles were confined in cells 

 made of half-inch curtain rings fastened together and to the bark 

 by melted paraffin. When the beetles had been placed in the 

 cells a thin cover glass, the same as used in microscopio work, 

 was sealed on with paraffin. From one to four beetles were 

 placed in each cell. This method, first suggested by Mr. Parrott, 

 proved to be the most 'Satisfactory as nearly every beetle began 

 at once to burrow into the bark and none of them were lost. A 

 pho:tograph of some of the cells attached to the trunk of a young 

 plum tree is shown at Fig. 9. 



Activities of the oonfined beetles. — The amount of time required 

 for the beetles to bury themselves in the bark varied from about 

 an hour to three hours or more. Whether the beetles will deposit 

 eggs in these young trees and beetles mature, it is too early yet 

 to determine. On November 18, some of the channels were cut 

 open. They were very irregular and extended in all directions. 

 No eggs or larvae were found. 



Hibernation of the beetles. — At the time of writing, Nov. 18, a 

 large number of examinations of bark and branches have been 

 made. As previously stated only beetles were found in the bark 

 of the peach trees evidently preparing to hibernate. The eggs 

 and larvae in the twigs would indicate hibernation in. the larva 

 or adult stage. 



T1i€ adult. — The adult is a beetle measuring from 1.5 to 2.2 

 mm. in length and varying in color from reddish-brown to nearly 

 black. The beetles move about quite rapidly and fly readily. 



