17 



special interest from the fact that there appears to be no previous 

 record of a Scolytid bark-beetle infesting either Alnus or Tsuga. 



Another Scolytid, which does not seem to be referable to any known 

 genus, was found in the thin bark of young dying sugar pine trees in 

 the vicinity of Grants Pass, Oreg. ; also in other pines and in the 

 red fir. 



The numerous other Scolytids represented in the collection made on 

 this trip can not be mentioned in this preliminary report, but will form 

 the subject of several pages of original matter in my final report on the 

 results of this investigation. 



DESTRUCTIVE BUPRESTID ENEMIES OF HEMLOCK, RED FIR, AND 



NOBLE FIR. 



The evidence found in living, dying, and dead noble fir and hemlock 

 in the Cascade Forest Reserve, at Berry, Oreg. , and in hemlock and 

 red fir along the Columbia River, in the vicinity of St. Helen, indicated 

 that much loss of valuable timber had been due to the work of 

 Buprestid larvas in the living bark of these trees. The conditions 

 at the time were not favorable for a study of this class of enemies or 

 for a special investigation of the damage which seemed to be due to 

 their attacks. It is, however, a subject of special importance, which 

 will demand considerable attention in the future. Specimens of larvae 

 collected from the bark of living trees were provisional^ identified 

 by Mr. Schwarz as belonging to the genus Melonophila, probably M. 

 drummondi, which is closely allied to M.fulvoguttata, a destructive 

 enemy of the he mlock in West Virginia. An undetermined Ceram- 

 bycid bark borer was found associated with the Buprestid larvae in 

 hemlock a^d red fir, but the evidence pointed to the Buprestid as 

 having * -lade the first attack. 



FOREST TREE DEFOLIATORS. 



While I did not have an opportunity, owing to the earliness of the 

 season, to investigate the insects which are injurious and destructive 

 to the foliage of forest trees, I found abundant evidence of this class 

 of depredators, especially in the work of the pine butterfly on the 

 yellow pine of eastern Washington and western Idaho, and the 

 Geometrid of Clatsop County, Oreg. , on Tideland spruce and hemlock. 



The work of the pine butterfly has been previously recorded by 

 Mr. Stretch, in Papillio (Vol. II, pp. 103-110), and subsequently 

 copied in the Fifth Report of the United States Entomological Com- 

 mission (pp. 762-767). The subject has also received special attention 

 within recent years at the hands of Professor Aldrich, of the Idaho 

 station; therefore the only observation made by the writer on this trip 

 which it seems proper to mention in this connection is that relating to 

 8602— No. 21 2 



