101 



263. The Hickory Bark-Beetle. 



tScolytus quadrisinnosus Say. 



A common liark-beetle in hickory, frequently causing the death of trees. The 

 adnUs also do some damage by gnawing the base of small twigs, causing their death. 

 Exhibit: Adults, work. 



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 timl)er. 



Exhibit: 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 

 great destruction of large quantities of the best timber. 



Exhibit: Adults, work. 



266. The Bald Cypress Bark-Beetle. 



Phlieosinus n. sp. 



Attacks recently felled and girdled bald cypress in the Southern States. 

 Exhibit: Adults, work. 



PE.EDACEOUS AND PARASITIC ENEMIES OF DESTRUCTIVE 

 FOREST INSECTS. THE CLERIDS. FAMILY CLERID^. 



267. The Dubius Clerid. 

 Thunasimus dubius Fab. 



The beetles destroy the adults, and the larva? 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. 

 Exhibit: Adults. 



268. The Spider-like Clerid. 

 Clems spliegeus Fab. 



The adults feed upon the adults and the larvae upon the developing broods of 

 numerous destructive bark-beetles in pine, spruce, and fir. Western States. 

 Exhibit: Adults. 



269. The European Bark-Beetle Destroyer. 



Thanasiinus forniicurms 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. 

 Exhibit: Adults. 



270. The Orange-Banded Clerid. 

 Clerus irhneumoneus Fab. 



The larvfie prej' upon the developing l)roods of the hickory l)ark-beetle {Scoh/lns 

 qtiadrisjniiusus). 

 Exhibit: Adults. 



