CONTENTS: 
Page. 
Request, authorization, and. instructions....-..--..:......---s.---.-..-2.--2 if 
2 DnB TERA (TVA SITY 2 0) peat an a a 7 
ren cOMUMU OM SPOWSEIVEM a. so ke os aw ss a -oceaccce 5 jc tjacc socce eee oeeeeen tes 7 
1 Ss SHMTVO Tue AT OG 2S 0 ECT 0727 eee ne 7 
einai MECHA TOMGed ays See eee hs ae ok af c,o soaps ett et tama ss e-cse 7 
PEERmOMOe catised Wy IMSCCtS ..222.25- 2.222 e046 oe ce te nde me oes ne ncn soa sen 9 
DAB TEREST NPP REVS nS leg fea nn lS 9 
Ree ema cen lore eee ne see Pee ce Rev SA Oot ee ee eee ce 9 
Peerrent mpm COMM s ae tee, esac oe cok Ses a es ose + MSE oe win ene eae es 10 
ine Orevon Lomicus (Tomicus oregont Michh.) ....../222.---2-se0+25- 10 
The coarse-writing bark-beetle ( Tomicus calligraphus Germ.) .....------- it 
The wood-engraying Tomicus (Tomicus cexlatus Eichh. var. scopulorum, 
lg WEES) a SESSASA eae eS aa eae lle spel are a ae ear I oe 2, 
The dark-red turpentine beetle (Dendroctonus valens Lec.) .......--------- 12 
The western pine Hylurgops (Hylurgops subcostulatus Mann.) ....------- 13 
The pine-root bark-beetle (Hylastes porosus Er.) ...........------------- 13 
1 SUPEYELM EWAN fy eu) DTS esp A ae sy aA 1 
Ambrosia or timber beetles and wood-boring grubs ..............--...-- 14 
Sete ReCHC wie UROM, OFMEF CAUSES... - oc - eese oc ea we wtaicescses-8 14 
bere Kaper pibe haw OM aa 2 6 Soo ae wk, nos nye eee He ew ee ne 14 
2 TUS a2 EGE eee es ec Pn AI ag ec ce RE 14 
LINES SE Git Sahl 3G iy OVE Ns Ve LE Fees ne 15 
Natural enemies of the destructive and injurious insects..............------- 15 
PURSE 2 UBB ogy ioe wal Sh 2a eg a a 15 
ive pinish-ereen, predaceous: beetles...) se sc obs ceases sccues <a 15 
Gierianpecved and Ghee lanver: fsck ult Secs 3 odincchs va fds Lec Son's 15 
Red-bug enemy of the bark-beetle ( Trogosita virescens Fab.).......-- 16 
WempECUUeCeGHnDCCbiCn. oc. cake ones oon se ele. SE eS Pecos nee 16 
iene Clams pete = ewe te wae yk hee ate So on ole ae 16 
wee DES GARD ore, 2 Oe oo Re Pe ee ee ne Oe mea 16 
Birds as enemies of the destructive beetle ...........-.-..-.------------ GR 
Howetie trees are attacked and@killed. .. . o..220....520-ceceeec enn sceee seen 17 
Characteristic features of the living, dying, and dead trees infested and killed 
TLD Tyee Eta Se ae se) ee es se ne 0 a ee ee ee 19 
aimee ABele PMC ER CECNIg2 ie An 88 OS nS A acak hee sacle Soe bens 19 
eb Ne ARIMCeOl WIONCINES 26 5525.2 cancicsrs Sedo d~ oda Culoniaesdecanadcesecsss 19 
Appearance of the trees that have been dead three years or more.....--- 19 
Evidence of the work of the beetle on old dead trees............-.------ 20 
The relation of wood-boring insects and wood-destroying fungi to the rapid 
EIB EE S7G'GE J8 CONEY i ESTES 770700 re a 20 
