446 



NEW YORK STATE MUSEUM 



injury. It has been recorded from a number of Northern States, and has 

 been taken on linden, beech, hickory and chestnut. 



Hickory timber beetle 



Xylcborits cclsus Hieh. 



A cylindric, brownish lieetle about y,6 inch long, makes holes of nearly uniform 

 diameter in hickory and oak. 



This species was bred in considerable numbers out of hickory logs 



from trees killed by the hickory bark borer, Scolytus quadrispi- 



n o s u s Say, at Geneseo N. Y. 



Description. The beetle is about 



yi6 inch long-, rather slender, almost 

 c)lindric in shape, with the tips of 

 the protruding mouth parts slightly 

 darker. The prothorax and elytra 

 are rather sparsely clothed with slen- 

 der, yellowish hairs, and there are 

 ''V two prominent and a number of less 

 distinct tubercles on the somewhat 

 steep declivity. This species, accord- 

 ■"^ ing to Dr LeConte, dilfers from 

 X. dispar Linn, by its much 

 more elon- 



Fig. I02 Female an. I male of XyleWnrub l e 1 s u s (After (r^^tg forUl, 

 Huhliarcl, U. S. Miv. Ent. Bill. 7, n. s. '97) '"^ 



the thorax 

 being about one half longer than wide, with the 

 sides parallel behind the middle and the elytra much 

 more than one half longer than the thorax. The 

 antenna is illustrated on i>late 67, figure 14 and a 



' " Fi^. 103 Middle tibiae : rt=Xyle bonis 



portion of the nroventriculus on plate -69, figure 8. "Uus-, /.=x. dispar; r=chra- 



^ * ^ '' ^ mesushicoriae, much enlarged 



Life history. This is our largest American (""ginaij 

 species of the genus, and according to Mr Hubbard, has been found 

 only in hickory, though Drs Packard and LeConte record it as an 



/T " 



