42 



CASE 47. 



264. The Mountain-Pine Dendroctonus {Dendroctonus h. sp.). 



Attacks living, injured, and recently felled mountain or silver pine, sugar pine, 

 and lodge-pole pine in the Northwestern States. Very common and capable of great 

 destruction to the best timber. 



Exhibit: Adults, work. 



265. The Arizona Dendroctonus (Dendroctonus n. sp. ). 



A common bark-beetle in the southern Kocky 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 (PMccosinus n. sp.). 



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

 Exhibit: Adults, work. 



PFvEDACEOTJS AND PARASITIC ENEMIES OF DESTRUCTIVE 

 FOREST INSECTS. THE CLERIDS. FAMILY CLERIDiE. 



CASE 48. 



267. The Dubius Clerid ( Thanasimus dubius Fab. ). 



The beetles destroy the adults, and the larvae 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 (Clerus sphegeus 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 (Thanasimus form icarius 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 Orang-e-Banded Clerid (Clerus ichneumoneusFafo.). • 



The larvae prey upon the developing broods of the hickory bark-beetle (ScoJt/tus 

 quadrispinosus ) . 

 Exhibit: Adults. 



271. The Hairy Clerid (Chariessa pilosa Forst. ). 



The larvae prey upon and do much toward preventing the increase of several of the 

 destructive flat-headed borers (Buprestidse) in deciduous trees. 

 Exhibit: Adults. 



THE CLICK BEETLES. FAMILY ELATERID^. 



272. The Eyed Elater (Alaus oculatus Linn.). 



As a larva preys upon numerous species of bark and wood boring insects in 

 deciduous trees. 

 Exhibit: Adults. 



273. The Small-Eyed Elater {Alaus myops Fab.). 



As a larva preys upon the larger species of borers in coniferous trees. 

 Exhibit: Adults, larva. 



