February, '09] JOURNAL OF ECONOMIC ENTOMOLOGY 49 



reported recently. I took these extracts from manuscripts already 

 prepared in order to call attention to the fact that some of our most 

 destructive forest insects can be controlled without cost, and often 

 at a profit. 



AN EXAMPLE OF FOREST INSECT CONTROL AT A 



PROFIT 

 By A. D. Hopkins. Washhifitou. D. C. 



In May. 1907, Mr. W. D. Edmonston. a forest ranger, detailed 

 from the forest service to the Bureau of Entomology, to work under 

 our instructions in the location of evidences of beetle infestation in 

 the National Forests of Colorado and adjoining states, reported that 

 the pine timber was dying on a large estate not far from Idaho 

 Springs, Colorado, and in the adjoining Pikes Peak National Forest. 

 ]\lr. Edmonston was then instructed to make more detailed examin- 

 jitions, after which he reported that some 63,000 feet of standing 

 timber on the estate was infested by the Black Hills beetle and that 

 unless the ravages were checked at once it would kill the timber not 

 only on this estate, but that on the adjoining estates and National 

 Porest. The owTier of the property was advised by the Bureau of 

 Entomology to take radical action according to a special recommen- 

 dation and detailed instructions relating to a necessary control policy. 

 Ko action was taken, however, before the first of the following July, 

 and therefore not in time to prevent the broods of beetles from swarm- 

 ing from the infested trees and extending their ravages. In De- 

 cember. 1907, Mr. Edmonston was instructed to make another exam- 

 ination of the timber. Avhen he found that his prediction was being 

 fulfilled, and that instead of 65.000 feet of timber in the old infes- 

 tation, there was nearly four times as much timber involved in the 

 new. or over 250.000 feet. The owner was again notified of the se- 

 rious character of the outbreak, and the further suggestion made 

 that if the logs from the infested trees were converted into lumber 

 and the slabs burned l^efore ^lay. 1908. it would result in the pro- 

 tection of the remaining living timber. Immediate steps were then 

 taken by the owners to carry out the original recommendations. ^Ir. 

 Edmonston gave instructions to the manager of the estate in locating 

 and marking the infested trees and in the essential features in the 

 methods of utilization to destroy the necessary number of beetles. He 

 also marked the infested timber on an adjoining estate and on the 

 National Forest. Five months later, in May. 1908. ]Mr. Edmonston 

 reported that the larger clumps of infested trees on the estate had 

 been converted into lumber and the slabs burned, and that the 



