35 



THE ROUND-HEADED BORERS. FAMILY CERAMBYCIDiE. 



CASE 34. 



185. The White-Pine Sawyer (Monohammus scutellatus Say). 



Larva? mine the inner bark and bore deep into the sapwood of white and silver 

 pine, hastening the death of dying trees and injuring saw logs. 

 Exhibit: Adults, work. 



186. The Common Pine Sawyer {Monohammus confusor Kirby). 



The larva? mine the inner bark and bore large holes into the sapwood of dying 

 trees and saw logs of pine and spruce. 

 Exhibit: Adults, larva. 



187. The Ponderous Pine-Borer (Ergates splculatus Lee. ). 



Larva? bore in dead pine logs, injuring them for timber. Northwestern States. 

 Exhibit: Adults, larva, work. 



188. The Knob-Horned Pine-Borer (Acanthocinus nodosus Fab. ). 

 The larva? mine the inner bark of pine stumps and large logs. 

 Exhibit: Adults. 



189. The Obsolete Pine-Borer (Acanthocinus obsoletus Oliv.). 

 The larva? mine the inner bark of freshly killed pine. 

 Exhibit: Adults. 



190. The Small Pine Bark-Borer (Ceratographis pusillus Kirby). 

 Larvae mine the iimer bark of dead and dying pine. 



Exhibit: Adults. 



191. The Lesser Pine Borer (Asemum mocstum Hald.). 



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

 States. 



Exhibit: Adults. 



CASE 35. 



192. The Poplar Borer (Saperda calcarata Say). 



Larvae bore in trunks of living poplar, cottonwood, and willow, causing great 

 destruction to these trees. 

 Exhibit: Adults, work. 



193. The Common Elm-Tree Borer (Saperda tridentata Oliv.). 



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

 causing great destruction. 

 Exhibit: Adults, work. 



194. The Poplar Grirdler (Saperda concolor Lee). 



Larva? mine in green bark of poplar saplings, girdling the trunks and causing 

 large swellings; also attack willow. 

 Exhibit: Adults, work. 



195. The Sugar Maple Borer (Plagionotus speciosus Say). 



Larva? 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 robinise Forst. ). 



Larva? mine the wood and bark of living black locust, causing great damage and 

 destruction. 

 Exhibit: Adults, work. 



