-_ 14 - 
E. W. Jones, engaged in wireworm investigations in Walla Walla, 
Wash., reports a plan to underteke a continuing series of quantitative 
studies of wireworms, "to determine such points as (1) the brocd nunber, 
(2) normal seasonal mortality, (3) food preferences, and (4) the effects 
of edaphic and climatic factors on the numbers of each brood of wire- 
worms. * * * The methced of sampling consisted of taking a set of 25 one- 
quarter square foot samples 12 inches deep in each field. Each sample was 
taken by driving a 6 by 6 inch by 1 ft. steel form into the ground and 
removing the soil within the forms. Each sample was then washed in 40- 
mesh screen pans. The wireworms thus secured were counted and records 
made of the number of each brocd cbtained in a sample." Mr. Jones pre- 
sents the following table giving the results of this type of investiga- 
tion for the season 1931: 
Precentage of total wireworms of the 1931 brood _in various crops 

-sNNumber 1/4 Total Number ii Percentages» 
tees lea sq. ft number | wireworms aot" pee Cae 
Samples. wireworms— per so lit a eee 
Pheletes canus Lec. 
PMT OU nn asa dh0e as 5 60 . 164 a a - ... 69s 
PEDO Ui gsstscveenns- seus: 29 AV S21 0. te eden tor bie. 75 | 
MCLG Oe ses cncsrotnis asses LOO Sars vA a . DE 64 
BM OOLTACN asvstsveievannste 20 127 | 25 | 81 
C. (EOD GO aes, SUR Reeer soe ee tH 167 LO te ees 65 
eV Des 2... ek iy, 41 $e CAP LAG So eae ESTAS: 65 
maesweetclover.,.i.i.,.. 6 : O99 tee tun 635) Lt 
Pheletes californicus Mann. s 
BePAV EA Via, ci.tib. its DOve is die ye 152 . Lea 55> | 
RROD USK. Cit. cirepdee ne aii Oe. 155 RO i, se). tee 
LL RR RD SE CY Ye mak Fan Co A ne A RE OCT TES hl TE, OS ON a Se A AS A et RI th mo a a HE Soe 

Total average 63 per cent 

en ns ae SO 
sixty-three per cent of the total number of wireworms in the soil 
samples were found to be of the 1951 brood, 
FOREST INSECTS 
A. L. Gibson, who is in charge of the annual insect survey of the 
seaverhead National Forest, Mont., reports that preliminary results show 
a tremendous increase in the 1931 infestation by the mountain pine beetle 
(Dendroctcenus monticolae Hopk.}), and states: "On the northern and western 
portions of the forests, where the units have been completed, there is an 
increase of some 5,500,000 trees over the number attacked in1930, Exper- 
iments conducted in connection with this survey show very clearly that 
the attacking beetles emerge some few weeks after attack and reattack 

