These will "be carried out on the Black Hills, Medicine Bow, Roosevelt, and Pike 
National Forests. In Utah, the current infestation is considerably more aggress- 
ive. Treatment of approximately 17,000 infested ponderosa pines on the Powell 
National Forest during the winter of 1939“^-0 caused a 92 -percent reduction on 
the treated area. A residual infestation of 6,000 trees chiefly on the un- 
treated areas remains to he treated this xonter. On the Wasatch National For- 
est the current Black Hills beetle infestation in lodgepole pine stands has 
reached epidemic proportions. An extensive control program is being conducted 1 
agc.ins t this infestation and it is hoped that by spring the areas of heaviest 
concentration will have been covered. (F. P. Keen, Bureau of Entomology and 
Plant Quarantine, U. S. D. A.) 
JEFFREY PINE BEETLE 
Throughout the Jeffrey pine stands of northeastern California surveys 
showed a marked increase in loss resulting from current infestations by the 
Jeffrey pine beetle. A considerable portion of the 124 board-foot-per-acre 
loss in the Lassen Forest and over half the 200 boa.rd-foot-per-a.cre loss cruisi 
on the Plumas Forest area was loss in Jeffrey pine. In spite of this activity, 
surveys of the Mono and Inyo stands to the south show very little activity and 
loss. (J. M. Miller, Bureau of Entomology and Plant Quarantine , U. S. D. A.) 
ENGELMANN SPRUCE BEETLE 
The sudden epidemic flare-up of the Engelmann spruce beetle ( Dendroc tonus 
engelmanni Hopk. ) which occurred some 4 years ago and resulted in a. tremendous 
destruction of spruce within the Yellowstone National Park and other areas, 
has decreased materially in severity. Although there are a few scattered light 
infestations of this insect within the northern Rocky Mountains, the epidemic 
has died down, owing in many areas to the lack of host material. (J. C, 
Evenden, Bureau of Entomology and Plant Quarantine , U. S. D. A.) 
ENGRAVER BEETLE 
The Oregon pine engraver ( Ips oregoni Eichh. ) continues its spot killing 
of small areas o.f nonderosa pine reproduction and small trees throughout the 
Inland Empire. These small flare-up infestations are in most cases associated 
with sporadic logging or wood-cutting operations. Such outbreaks are short- 
lived and control mea.sures are seldom necessary. (J. C. Evenden, Bureau of 
Entomology and Plant Quarantine, U. S. D. A.) 
. DOUGLAS FIR TUSSOCK MOTH 
The outbreak of the Douglas fir tussock noth ( Eenerocampa pseudotsugata 
McD.), which during the last few years destroyed some rather large patches of 
Douglas fir within the Sawtooth National Forest, has decreased to where no 
visible defoliation has occurred during the last two seasons. Associated with 
the Douglas fir tussock moth during this outbreak wore large numbers of a 
geonetrid defoliator, ' Nepytia canos aria var. Nik. The combined feeding of 
these two species of insects resulted in a. complete defoliation of the trees, 
(j. C. Eyenden, Bureau of Entomology and Plant Quarantine, U. S. D. A.) 
