THE GENUS DENDROCTONUS. 37 



The owner was" again notified in December, 1907, of the serious char- 

 acter of the outbreak, and the suggestion made that if the logs from 

 the infested trees were converted into lumber and the slabs burned 

 before the next May, it would result in the protection of the remain- 

 ing living timber. Immediate steps were then taken to carry out 

 the original recommendations. Mr. 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 

 a sufficient number of beetles to check the infestation, and he 

 also marked infested timber on the adjoining estate and National 

 Forest. 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 those on the adjoining estate and 

 National Forest had been cut and barked. In November, 1908, Mr. 

 Edmonston was instructed to make another inspection of the forest 

 on the estate and surrounding area, and on December 1 he reported 

 as follows : 



Nothing could be more satisfactory than the results obtained by the cutting of the 

 infested timber on the estate. Your recommendations and instructions submitted 

 to the owner, and carefully followed by the manager of the estate, have clearly demon- 

 strated that insect infestation can be controlled and at no expense to the owner of the 

 timber involved; in fact, a very satisfactory price was realized, resulting in a net 

 profit, I understand, of $5 per thousand feet, board measure, on the 240,000 feet cut. 

 This, of course, does not include the profit of the milling operations, but for the logs 

 sold at the mill, after deducting the expenses of cutting and logging. The sawmill 

 was owned and operated by an Idaho Springs firm, and the manufactured article sold 

 in that town. I spent six days on the estate — November 18 to 23. After a very 

 thorough examination of the timber, I found only three infested trees, isolated 

 individuals, over a mile from where the large clumps of infested trees were cut. 

 With the exception of those three trees there is no new infestation on the estate. I 

 also examined the adjoining lands, but no new infestation was observed. The infested 

 trees which I marked in December, 1907, had all been cut and barked. On the 

 Pike National Forest, contiguous to the first-mentioned estate, where, you will 

 remember, I marked some clumps of infested trees, no new infestation was found — 

 not one tree. I found that all the infested trees I marked had been cut and barked. 

 Ranger Kelso had charge of this work, and it has been quite thoroughly done. 



This most gratifying result demonstrated two important facts: 

 One, that a very extensive outbreak by one of the Dendroctonus 

 beetles can be controlled without expense, and even at a profit, 

 whenever the conditions are favorable for the utilization of the 

 infested timber; the other, that the essential details, recommenda- 

 tions, and expert advice can be sucessfully carried out by a manager 

 of a private forest and by the rangers of National and State forests. 

 It also indicates quite conclusively that the widespread depredations 

 in the Black Hills National Forest could have been prevented with very 

 little expense to the Government if the matter had received prompt 

 attention in 1901, when the first investigations were made and recom- 



