46 



293. The Large Mahogany Timber Beetle (Platypus sp.). 

 Attacks mahogany trees and saw logs before importation. 

 Exhibit: Work. 



INSECTS INFESTING CYPRESS. 



CASE 54. 



294. The White-Lined Cypress Borer (Physocnemum andrese Hald.). 



Larvae 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 (CEmc rigida Say). 

 Larvae mine inner bark of girdled cypress and dying cedar. 

 Exhibit: Adult; larva; work; larval mines in bark of girdled cypress. 



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



Attacks recently felled and girdled bald 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 larvae. 



297. The Cypress Sapwood Borer (Acmscodera pulchella Hbst.). 



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

 death, causing rapid decay. 

 Exhibit: Adult; larva; work. 



298. The Cypress Weevil (Eudocimus 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 larvae of this beetle which would eventually result in defects 

 in the timber. 



SECTION IV. 

 PHOTOGRAPHS. 



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

 Dakota. 



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

 olina. 



Trunk of western yellow pine killed by the Arizona ^Dendroctonus, showing work 

 of beetles. New Mexico. 



Western yellow-pine tree, showing injury caused by the dark-red turpentine beetle 

 at base. New Mexico. 



Monterey pine tree, showing injury of the dark-red turpentine 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-pine trees killed by the mountain-pine Dendroctonus. Priest Biver Forest 

 Reserve, Idaho. (2.) 



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

 of Washington. 



