78 
INJURY BY BARK-WEEVILS. ORDER COLEOPTERA, FAMILY 
CURCULIONIDZ. 
PARE ORs AS Hy LZ: 
57. The Sugar Pine Bark-Weevil. 
Pissodes sp. 
Adult snout-beetle deposits eggs in the outer bark of young living and injured 
sugar pine, producing small whitish grubs which mine through the inner bark and 
change to the adult in oval cavities excavated in the surface of the wood, causing the 
death or abnormal development of the trees. Grants Pass, Oreg. 
Exursit: Work. 
58. The Douglas Spruce Twig-Weevil. 
Curculionid. 
A small snout-beetle which deposits eggs in cavities in the bark of the small cen- 
tral shoots and terminal twigs of young, living Douglas spruce. The small whitish 
grubs mine through the inner bark and enter the pith to change to the adult, killing 
the twigs and causing a deformed development of the tree. St. Helen, Oreg. 
Exaripit: Work. 
59. The Pine Fungus-Gall Weevil. 
Curculionid. 
A small snout-beetle breeding in the bark and wood of a common fungus gall on 
the shore pine and western yellow pine, causing the death of the branches and young 
trees. Newport, Oreg., and Moscow Mountains, Idaho. 
Exuisit: Work. 
INJURY TO DEAD WOOD AND BARK BY POWDER-POST BEETLES. 
ORDER COLEOPTERA, FAMILY PTINIDZ. 
PART OF CASH 17. 
60. The Pine Wood Perforator. 
Ptinid ? 
Small white grubs burrow through the dead wood of western yellow pine logs, caus- 
ing rapid decay. Grants Pass, Oreg. 
Exuisit: Work. 
61. The Giant Arborvitze Ptinid. 
Ptinid. 
Small white grubs boring in the dead heartwood of living giant arborvite, con- 
tributing to the rapid decay of the heartwood. Port Angeles, Wash. 
Exursit: Work. 
62. The Giant Arborvite Dryophilus. 
Dryophilus sp. 
A small whitish grub and brownish beetle, breeding in the outer bark of the giant 
arborvite. Its work is very common. Detroit, Oreg., and Port Angeles, Wash. 
‘“Represents a European family and genus heretofore unrecorded from North 
America.’’ (Schwarz. ) 
Exuisit: Work. 
INJURY TO TWIGS BY BARK MAGGOTS. ORDER DIPTERA, 
FAMILY CECIDOMYIIDZ. 
PALER EF OR CASE LZ. 
63. The Pine Twie Maeeot. 
Cecidomyiid. 
x 
Minute reddish maggot, living in the bark of terminal twigs of the western yellow 
pine, causing the leaves to turn yellow and die. Moscow Mountains, Idaho. 
Common. 
Exuisst: Work. 
