Dendroctomis brevicomis and Ips confusus under ordinary 

 conditions attack nearby trees. Dendroctonus monticolae in 

 sugar pine is apt to fly farther, undoubtedly due to the 

 more scattering distribution of sugar pines. Therefore, it 

 has become a rule with spotters, especially in yellow pine 

 infestations, to look for freshly infested trees in the in- 

 mediate vicinity of recently killed trees. 



Fprm I Data. 



After locating an infested tree, the spotter 

 should fill in the "Form I" shett , (see P. 5 of appendix) 

 giving it the proper consecutive number, mr.rk the number of 

 the tree on the base nap, anci blaze the tree, also marking tL 

 number on the blaze with blue crayon. 



It is always well for a spotter to go over some 

 of the freshly cut trees, from tine to tine, and check up his 

 data, especially in the case of doubtful trees. A memoranda 

 of 6 at a which the spotter cannot fill out should be given 

 each foreman of the three -man crews. After cutting a tree, 

 the foreman of each crew should place the number of the tree 

 en the top of the stump in blue crayon and collect the re- 

 qiiired data, turning it in each ni^hi to L'ho chief rf party, 

 who will then enter it on the proper "Porn I" slip. The nar:e 

 or initials of the foreman should be placed ^n ; ;he slip in 

 the lower left-hand corner. 



-51- 



