THE GENUS DENDKOCTONUS. 



139 



W. E. Jackson, with the statement that the beetle was doing consid- 

 erable damage in the Big Horn National Forest, Wyo. 

 Nothing further is known of the habits of this species. 



BASIS OF INFORMATION. 



Information about this species is based on specimens and notes 

 received from Forest Assistant Jeremiah Rebmann, of the Forest 

 Service, July, August, and October, 1905, collected in the Medicine 

 Bow National Forest, Wyo., and through the Forest Service from 

 W. E. Jackson, Big Horn National Forest, Wyo.; on investigations 

 by Mr. W. D. Edmonston, in the Pike National Forest (Jefferson), 

 Colo., December, 1906; on specimens received through the Forest 

 Service from the Cheyenne National Forest, September, 1908. Addi- 



Fig. 89.— The lodgepole pine beetle: Distribution map. (Author's illustration.) 



tional localities from correspondence and other collections are, 

 Saratoga, Yellowstone National Park, and Homestake, Wyo. It is 

 represented in the forest-insect collection of the Bureau of Ento- 

 mology by more than 100 specimens. 



BIBLIOGRAPHY. 



Hopkins, 1909, pp. 140-142. 



No. 20. THE ALLEGHENY SPRUCE BEETLE. 



(Dendroctonus punctatus Lee. Figs. 90, 91.) 



The Allegheny spruce beetle is a stout, brownish, cylindrical bark- 

 beetle, 6.5 mm. in length, resembling D. piceaperda, but larger, with 

 distinctly longer elytra in proportion to the thorax; head broad, 



