99 
247. The Oak Carpenter Worm. 
Prionoxystus robinie Peck. 
The larvee mine in living oak and locust, and are sometimes very destructive, espe_ 
cially to aged trees. 
Exuisit: Adults, work. 
248. The Poplar Carpenter Worm. 
Cossus centerensis Lint. 
The larvee mine in trunks of cottonwood. 
Exursir: Adults. 
THE HORNTAILS OR WOOD WASPS. FAMILY UROCERIDZ. 
CASH 443. 
249. The Pigeon Tremex. 
Tremex columba Linn. 
Larvee mine the sapwood of hickory, oak, poplar, maple, and other deciduous 
forest trees, hastening the death of those weakened by other causes. 
Exuisir: Adults, work. 
250. The Pale Tremex. 
‘ Tremex sericeus.Say. 
Habits like the pigeon tremex. 
Exuisir: Adults. 
251. The White-Horned Horntail. 
Urocerus albicornis Fab. 
Attacks spruce, hemlock, and fir. 
Exuinit: Adults, larva, pupa, work. 
252. The Blue Horntail. 
Paururus cyaneus Fab. 
Attacks spruce and fir. 
Exuisit: Adult. 
253. The Banded Horntail. 
Urocerus abdominalis Harr. 
Attacks spruce. 
Exuisir: Adults. 
254. The Yellow-Winged Horntail. 
Urocerus flavipennis Kirby. 
Attacks spruce. 
Exuisir: Adults. 
255. The Small-Pine Horntail. 
Paururus pinicola Ashm. 
Larvee in pine. 
Exuisir: Adults. 
256. The Black-Pine Horntail. 
Paururus hopkinsi Ashi. 
Larvee in pine. 
Exuisir: Adults. 
