93 



188. The Knob-Horned Pine-Borer. 



Acanthocinus nodosus Fal). 



The larva^ mine the inner l)ark of pine stumps and large logs. 

 Exhibit: Adults. 



189. The Obsolete Pine-Borer. 



Acanthocinus obsoletvs 01. 



The larvpe mine the inner liark of freshly killed pine. 

 Exhibit: Adults. 



190. The Small Pine Bark-Borer. 



Ceratographis pusUlus Kirby. 



Larva? mine the inner bark of dead and dying pine. 

 Exhibit: Adults. 



191. The Lesser Pine-Borer. 



At^anain )na'stitm llald. 



Larva? bore into sapwood of dead pine and spruce logs and stumps. Eastern 

 States. 



Exhibit: Adults. 



r'^SK 35. 



192. The Poplar Borer. 



Saperda calcarata Say. 



Larva? bore in trunks of living aspen, cottonvvood, and willow, t-ausing great 

 destruetion to these trees. 

 Exhibit: Adults, work. 



193. The Common Elm-Tree Borer. 

 Saperda tridentata 01. 



The larvio mine the bark and sapwood of dead, dying, and healthy elm, often 

 causing great destruction. 

 Exhibit: Adults, work. 



194. The Poplar Girdler. 

 Saperda. concolor Lee. 



Larva? mine in green bark of aspen and cottonwood saplings, girdling the trunks 

 and causing large swellings; also attack willow. 

 Exhibit: Adults, work. 



195. The Sugar-Maple Borer. 



Plaglonotus speciosus Say. 



Larvae mine the inner bark and sapwood of recently dead, dying, and living 

 maple, often causing the death of weakened trees. 

 Exhibit: Adults. 



196. The Locust Borer. 

 Cyllene robinix Forst. 



Larvae mine the wood and bark of living locust, causing great damage and destruc- 

 tion. 



Exhibit: Adults, work. 



197. The Linden Borer. 



Sajierda reslikt Say. 



Larvae mine the inner bark and bore into the trunk of linden, causing much injury. 

 Exhibit: Adults, work. 



