101 
263. The Hickory Bark-Beetle. 
Scolytus quadrispinosus Say. 
A eommon bark-beetle in hickory, frequently causing the death of trees. The 
‘adults also do some damage by gnawing the base of small twigs, causing their death. 
Exureir: Adults, work. 
CASH 47. 
264. The Mountain Pine Dendroctonus. 
Dendroctonus n. sp. 
Attacks living, injured, and recently felled mountain or silver pine, sugar pine, and 
lodgepole pine in the Northwestern States. Very common and capable of great 
destruction to the best timber. 
Exnisir: Adults, work. 
265. The Arizona Dendroctonus. 
Dendroctonus n. sp. 
A common bark-beetle in the southern Rocky Mountain region, attacking healthy 
western yellow pine, and, in company with several closely allied species, causing 
ereat destruction of large quantities of the best timber. 
Exuisit: Adults, work. 
266. The Bald Cypress Bark-Beetle. 
Phleosinus n. sp. 
Attacks recently felled and girdled bald cypress in the Southern States. 
Exarsit: Adults, work. 
PREDACEOUS AND PARASITIC ENEMIES OF DESTRUCTIVE 
FOREST INSECTS. THE CLERIDS. FAMILY CLERIDA. 
CASH 48. 
267. The Dubius Clerid. 
Thanasimus dubius Fab. 
The beetles destroy the adults, and the larvee prey upon the developing broods of 
many species of bark-beetles in pine and spruce, and are frequently of the greatest 
_ benefit in holding in check the more destructive of these. 
Exursir: Adults. 
268. The Spider-like Clerid. 
Clerus sphegeus Fab. 
The adults feed upon the adults and the larvee upon the developing broods of 
/ numerous destructiye bark-beetles in pine, spruce, and fir. Western States. 
Exursit: Adults. 
269. The European Bark-Beetle Destroyer. 
Thanasimus formicarius Linn. 
Is very destructive to bark-beetles infesting pine and spruce in Europe, and was 
introduced into America in 1892 to act as a check to the alarming increase of the 
| destructive bark-beetle (Dendroctonus frontalis) in West Virginia. 
Exuisir: Adults. 
270. The Orange-Banded Clerid. 
Clerus ichneumoneus Fab. 
The larvee prey upon the developing broods of the hickory bark-beetle (Scolytus 
quadrispinosus ). 
Exuipit: Adults. 
