2S4 NEW YORK STATE MUSEUM 



bci^inninj^ of the winter, at whicli time they retire a little further into the 

 wood and close the opening of thi- burrows. When in thick limbs two or 

 three bore obliquely till they reach the center or near it, and then proceed 

 up it two or three inches, the galleries of different burrows being parallel 

 but not communicating. Dr Hamilton calls attention to the fact that 

 larvae near the center are larger, and he believes that only they attain 

 maturity, though in our experience the different sizes indicate the sexes and 

 unless parasitized all emerge. The larvae feed the second summer and 

 hibernate in j)upal chambers near the center and emerge the following 

 spring. riiis insect and its work is shown on |)latc 6, figuies 20-25. 



Description. 1 he bcctK- is a cinnamon l)ro\vn. white marked insect with 

 one elongated spot near the middle of the wing co\ers and a nearly circular 

 one toward the; apex. 



Distribution. Ibis sjjecies has been rc-corded from Canada, Xew \'ork. 

 New Jersey, Pennsylvania and <)hii). and a])pears to l)e limited in its range 

 to the northeastern I'nited .Stales. 



Natural enemies. Infesteil limbs are frequently in\estigated by wood- 

 peckers antl uniloiibledly many larvae perish owing to the acti\ it\- of tiiese 

 beneficial birils. 



Remedial measures. It shouKl l)e coni|)arati\'eI\- easy to keep this insect 

 in check b\' cutting away liie galls and burning them belore the insects ha\'e 

 an opijortunily to escajje. The onl\' oljjiction is that this procetlure would 

 be likel)' to mar the symmetry of tin- tree. 



Bibliography 

 1904 Felt, E. P. & Joutel, L. H. N. V. .State .Mus. Uul. 74, p. 63-66 



Bronze birch borer 

 .lori/iis (Ui.x/iis (ior\'. 



A flattened whitish rather delicate griili, alxnu -yl inch in length, witli a large flattened 

 head, may be found boring the inner bark of wiiite and otiier birches. 



The work of this destructive borer was brought to the writer's attention 

 in I 8g8, because of its serious injuries to white birches at Buffalo. Ximur- 



