36 THE SCOLYTID BEETLES. 
In 1905 the Black Hills beetle was killing patches of timber in the 
vicinity of Colorado Springs and Palmer Lake. Colorado, as it did 
in the beginning of the attack in the Black Hills of South Dakota, in 
1897, but through the efforts of the late Gen. William J. Palmer and 
others, sufficient numbers of infested trees were felled and barked on 
private land and in the adjoining Xational Forest during 1905 and 
1906 to destroy a large percentage of the beetles in the entire vicinity. 
Careful inspection during the fall and winter of 1906 and 1907 indi- 
cates that the pest is now under complete control within a radius of 
some hundreds of square miles. 
The successful control of another serious outbreak of the Black 
Hills beetle in 1906 on an extensive private estate in southern Colo- 
rado was effected through the efforts of the owners in having some 
500 infested trees felled and barked within the necessary period to 
destroy the brood-. A large percentage, but not all. of the infested 
timber was thus treated. This was so successful that not a single 
infested and dying tree could be found when the area was inspected in 
1908. In this, as in the other case, considerable unnecessary expense 
was involved in the burning of the bark and tops, but the utilizable 
timber was more than enough to pay all expenses. It is evident that 
in this case a destructive invasion was prevented, and that more than 
a million dollars* worth of timber was protected. 
The most striking example of success in control of the Black 
Hills beetle was reported in time for mention in this connection. 
Mr. W. D. Edmonston. a forest ranger, detailed from the Forest 
Service to the Bureau of Entomology to work under the instruc- 
tions of the writer in the location and reporting of evidences of 
beetle infestation in the Xational Forests of Colorado and adjoining 
States, reported in May, 1907, that the pine timber was dying on a 
large estate not far from Idaho Springs, Colorado, and the adjoining 
Xational Forest. He was instructed to make more detailed examina- 
tions, after which he reported that some 65,000 feet of timber on the 
estate were foimd to be infested by the Black Hills beetle, and that 
unless the ravages were checked at once the timber not only on this 
estate but on the adjoining estates and Xational Forest would be killed. 
The owner of the property was advised by this bureau to take radical 
action according to a special recommendation and detailed instruc- 
tion- relating to a necessary control policy. Xo action was taken, 
however, before the first of the following July, and therefore not in 
time to prevent the beetles from swarming from the infested trees 
and extending their ravage-. In December. 1907. Mr. Edmonston 
\\ as instructed to make another examination of the timber, when he 
found that his prediction was being fulfilled. He reported that in- 
stead of 65,000 feet of infested timber, there was nearly four times 
as much timber involved in the new infestation, or over 250,000 feet. 
