42 



castt: ^■ttT'. 



264. The Mountain-Pine Dendroctonus (Dciulroctonm n. sp.). 



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

 and lodge-pole i)ine in the Northwestern States. Very common and capa])le of great 

 destruction to the best timber. 



Exhibit: Adults, work. 



265. The Arizona Dendroctonus {Dctidroctniiux u. 9,\^.). 



A common bark-l)eetle in the soutliern llocky Mountain region, attacking healtliy 

 western yellow pine, and, in company with several closely allied species, causing 

 great destruction of large quantities of tlic best timber. 



Exhibit: Adults, work. 



266. The Bald Cypress Bark -Beetle ( /'hlcroshuis n. sp.). 



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

 Exhibit: Adults, work. 



PREDACEOXJS AND PARASITIC ENEMIES OF DESTRUCTIVE 

 FOREST INSECTS. THE CLERIDS. FAMILY CLERID-ffi. 



C^^SE 48. 



267. The Dubius Clerid ( Thanasimns daUus 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 sphegrm Fab.). 



The adults feed upon the adults and the larva' upcju the developing broods of 

 numerous destructive T)ark-l)eetles in piiif^, spruce, and fir. Western States. 

 Exhibit: Adults. 



269. The European Bark-Beetle Destroyer iTIinDadnmsformicariu!^ 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-l)eetle [Dendroctonus frontaUs) in West Virginia. 



Exhibit: Adults. 



270. The Orange-Banded Clerid {('leriiit ichnrinnoni'us Fab.). 



The larvae prey upon the developing broods of tiie hic'Kory bark-beetle (ScoJi/tus 

 quadrispinosus ) . 

 Exhibit: Adults. 



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



Tlie larva' prey uixin and do much toward preventing the increase of several of the 

 destructive Hat-headed borers {Ihi2)re>itid!r) in deciduous trees. 

 Exhibit: Adults. 



THE CLICK BEETLES. FAMILY ELATERID-ffi. 



272. The Eyed Elater {Alaui^ ondatu.^ Linn.). 



As a larva preys ui)on numerous species of bark and wood boring insects in 

 deciduous trees. 

 Exhibit: Adults. 



273. The Small-Eyed Elater [Alans nu/o/is Fa)).). 



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

 Exhibit: Adults, larva. 



