266 NEW YORK STATE MUSEUM 



hairs. The thin membranous labrum is divided into two parts, the basal 

 soHd, the terminal portion forming a movable flap, overlapping and reach- 

 ing nearly to the end of the mandibles when closed ; the basal portion is 

 shorter than broad, being broadly trapezoidal and smooth ; the outer 

 division is broader than long, the edges being rounded so that it is almost 

 broadly ovate (transversely) and smooth, covered with long hairs. It is 

 pale membranous with a testaceous hue. Mandibles black, very thick and 

 stout, wnth obtuse, rounded edges ; they are almost as long as the base is 

 broad. Ma.xillae membranous, flattened, maxillary palpi two jointed. 

 Labium membranous, with a transverse chitinous band near the insertion of 

 the two jointed palpi ; both joints short ; second one half as thick as the 

 first ; edge hairy, the hairs reaching to the ends of the palpi. Length of 

 the iDody .50 inch ; breadth of prothoracic segment, 4.2 mm ; breadth of 

 head, 3.2 mm. 



The adult beetle is about .^4^ inch long, jet-black in color and rather 

 prettily marked with golden yellow lines as in figure. The antennae 

 are a dark brown and the legs a light brown. Dr Walsh states that this 

 species may be distinguished from the closely allied locust borer by its 

 rela.xed antennae extending beyond the tip of the wing covers by the entire 

 length of the terminal segment, by the greater robustness of these organs 

 and by the terminal or eleventh segments being fully one half longer than 

 the penultimate and composed of two portions connected by a suture. The 

 wing covers of this species are widened at the base and taper toward their 

 tips, and the second or W-shaped band is whitish instead of yellowish 

 as in the locust borer [pi. 15, fig. loj. 



Natural enemies. I)r A. I). Hopkins records Hemirhipus fas- 

 cicular i s Fabr. as attacking the larva of this borer in mulberry and Mr 

 F. H. Chittenden states that Bracon erythrog aster Brulle was 

 reared from hickory wood infested almost exclusively by this beetle. 



Bibliography 

 1890 Packard, A. S. U. S. Ent. Com. 5th Rep't, p. 287- 88, 329 

 1893 Lintner, J. A. Ins. N. Y. 8th Rep't, ]>. 175-76 



