46 



293. The Large Mahog-any Timber Beetle (P/'f^/;)».s pp. ). 

 Attacks niahdjiaiiy ti'ccs ami ^a\v li>,us ])el'ore iiiiiinrtatioii. 

 Exhibit: Work. 



INSECTS INFESTING CYPRESS. 



CJ^Hldl Si. 



294. The "White-Lined Cypress Borer {Phi/sooicmwa andrcir Uald.). 



Larvaj mine the inner bark and outer sapwood of cypress logs. Southern States. 

 Exhibit: Adults; larva; gallery; complete larval mine on surface of wood of 

 girdled cypress tree. 



295. The Rigid Cypress Borer (G^me rigida Say). 

 Larvje mine inner bark of girdled cypress and dying cedar. 

 P^xhibit: Adult; larva; work; larval mines in bark of girdled cypress. 



296. The Bald Cypress Bark-Beetle {Phlceosinus n. sp.). 



Attacks recently felled and girdled l)ald cypress in the Southern States; beneficial 

 to girdled trees as it hastens death and causes the logs to dry more rapidly. 



Exhibit: Adults; inner bark from girdled cypress, showing characteristic galleries 

 of adults and larvse. 



297. The Cypress Sapwood Borer [Aamvodcra pnkJiella Hbst. ). 



A white grub whicli mines the sapwood of girdled cypress two or three years after 

 death, causing rapid decay. 

 Exhibit: Adult; larva; work. 



298. The Cypress Weevil {Eudoclmns mannerheimii Boh.). 



The adults feed on the bark of bald-cypress twigs, causing their death, and the 

 larvae mine the inner bark of injured and recently felled trees. Southern States. 



Exhibit: Adult; section from trunk of living cypress, showing partially healed- 

 over galleries made by larvse of this beetle which would eventually result in defects 

 in the timber. 



SECTION IV. 

 PHOTOGRAPHS. 



AVestern yellow pine trees killed by the pine-destroying beetle. Black Hills, South 

 Dakota. 



Section of yellow i>ine tree killed by the destructive pine bark-beetle. North Car- 

 olina. 



Trunk of western yellow ])ine killed l)y the Arizona Dendroctonus, showing work 

 of beetles. New Mexico. 



Western yellow-pine tree, showing injury caused l)y the dark-red turijentine beetle 

 at base. New Mexico. 



Monterey pine tree, showing injuiy of the dark-red turi)entine beetle at base. 

 California. 



Hemlock trees killed in 1892 by the hemlock span-worm. State of Washington. 

 Trunk of hickory tree killed by the hickory bark-beetle, showing growth of white 

 fungus following attack. Detroit, Mich. 



Silver-i>ine trees killed bj- the mountain-jiine Dendroctonus. I'riest River Forest 

 Reserve, Idaho. (2.) 



Bark from trunk of giant arborvita/, showing mines of the cedar bark-beetle. State 

 of Washington. 



