290 



NEW YORK STATE MUSEUM 



Description. The parent beetle is a minute reddish-brown, cylindric 

 insect, about 3/3, inch long. The shape of the antennal club, 

 the puncturing of the prothorax and the linear dotting of the 

 I eljtra are well shown in figure 51. .Structural details of the 

 first are shown on plate 67, figure i. The elytral declivity is 

 slightly excavated and marked by two rather inconspicuous 

 teeth on each side. 

 l\ This insect enters the dying or dead tree vertically 



for a distance of about }^ inch and from that point 

 inward branches may diverge at oblique angles. The 

 brood chambers are nearly 3 g inch long and extend vertically above 

 and below the main branches ^sce fig. 53]. 



Food plants. Mr H. G. Hubbard states that this species attacks m'JT- 

 oaks, hickory, beech, maple, aspen, apple and orange, and that the ^" „,' 

 list might be extended to include hard wood timber. Dr A. D. Zlch 

 Hopkins has recorded this insect as occurring in West Virginia in (orig'^'ai) 

 pine, white oak, black oak, red oak, jack oak, elm, beech, maple, chestnut, 

 bass wood, honey locust, yellow poplar or tulip, buckeye, morello cherry, 

 red cedar and hemlock. 



(After Hubbard, 

 U. S. Dep't Agric. 

 Div. Ent. Bui. 7, 

 n. s. 1897) 



(After Hubbard, U. S. 



Life history. Mr H. G. Hubbard has made some interesting observa- 

 tions on the life history of members of this genus. He states that the 



