46 



the genus and perhaps of allied genera. So nearly torpid were the 

 larvae when received and taken from their burrows, even in a well 

 warmed atmosphere, that they appeared as if dead, some of them 

 remaining motionless for a long time. 



In many instances it was noticed in the larger branches, which were 

 perhaps from 1.] to If inches in diameter, that the mines had pene- 

 trated to the center 

 of these branches, 

 and in some cases 

 went through 

 them. In no in- 

 stance was it found 

 that the parent in- 

 sect deposited her 

 eggs in branches 

 smaller than one- 

 half to three- 

 fourths of an inch 

 in diameter. 



During Novem- 

 ber no larvae could 

 be discovered in 

 dry wood, but were 

 found in wood 

 which retained 

 moisture, even 

 when it had been 

 cut down for nearly 

 a year. 



Writing Novem- 

 ber 14, Mr. Adams 

 stated that he had 

 just learned that 

 the Forest Lawn Cemetery at that city had been badly infested by this 

 species, and that about fifty of the birch trees had been removed during 

 the past two years, the cause of the injury not having been known until 

 the attention of the authorities was called to it by our correspondent. 

 Mr. Adams's observations lead him to the belief that the beetles 

 issue in greatest numbers from the trees, beginning in the last week of 

 J une ; but as several other species of Agrilus, as well as many other 

 borers which inhabit the same latitude, issue from two to four weeks 

 earlier, it seems probable that the earliest date of issuance remains to 

 be observed. 



It was noticed that one of our common woodpeckers, undoubtedly 

 the hairy woodpecker, Picus (Dryobates) villosus Linn., as well as could 

 be ascertained without capturing or shooting a specimen, fed quite 



Fig. 16. — Work of Agrilus anxins outrank of white birch, hark removed 

 to show larval galleries — somewhat reduced (original). 



