93 
188. The Knob-Horned Pine-Borer. 
Acanthocinus nodosus Fab. 
The larvee mine the inner bark of pine stumps and large logs. 
Exursitr: Adults. 
189. The Obsolete Pine-Borer. 
Acanthocinus obsoletus Ol. 
The laryee mine the inner bark of freshly killed pine. 
Exuisir: Adults. 
190. The Small Pine Bark-Borer. 
Ceratographis pusillus Kirby. 
Larvee mine the inner bark of dead and dying pine. 
Exuisit: Adults. 
191. The Lesser Pine-Borer. 
Asemum mostum Hald. 
Larve bore into sapwood of dead pine and spruce logs and stumps. astern 
States. 
Exaursit: Adults. 
CASE, 35. 
192. The Poplar Borer. 
Saperda calcarata Say. 
Larve bore in trunks of living aspen, cottonwood, and willow, causing great 
destruction to these trees. 
Exuisit: Adults, work. 
193. The Common Elm-Tree Borer. 
Saperda tridentata Ol. 
The larvee mine the bark and sapwood of dead, dying, and healthy elm, often 
causing great destruction. i 
Exuisir: Adults, work. 
194. The Poplar Girdler. 
Saperda concolor Lee. 
Larvee mine in green bark of aspen and cottonwood saplings, girdling the trunks 
and causing large swellings; also attack willow. 
Exuisit: Adults, work. 
195. The Sugar-Maple Borer. 
Plagionotus speciosus Say. 
Larve mine the inner bark and sapwood of recently dead, dying, and living 
maple, often causing the death of weakened trees. 
Exuipir: Adults. 
196. The Locust Borer. 
Cyllene robin Forst. 
Larve mine the wood and bark of living locust, causing great damage and destruc- 
tion. 
Exuipir: Adults, work. 
197. The Linden Borer. 
Saperda vestita Say. 
Larve mine the inner bark and bore into the trunk of linden, causing much injury. 
Exuisit: Adults, work. 
