HOPKINS: NEW SCOLYTOID BEETLES 429 



ENTOMOLOGY.— A new genus of scolytoid beetles.^ A. D. 

 Hopkins, Bureau of Entomology. 



There is in North America a group of beetles which inhabits the 

 young cones and, in rare cases, the twigs or shoots of different 

 species of Pinus. A representative of this group has been in 

 the Fitch collection since 1850; another in the Hubbard and 

 Schwarz collection since 1877; two species in Dr. W. H. Harring- 

 ton's collection, Ottawa, Canada, since 1885; one species in the col- 

 lection of Dr. J. Hamilton, Allegheny, Pa., since 1893; and dur- 

 ing the past thirteen years many species have been added to the 

 Forest Insect Collection of the Bureau of Entomology,, in the 

 U. S. National Museum. It has been found that some of the 

 species are exceedingly common and often so destructive to the 

 young cones of Pinus strobus in the East, Pinus scopulorum in 

 the Rocky Mountain region, and Pinus ponderosa and Pinus 

 lambertiana on the Pacific Slope, as to reduce the crop of seed 

 fifty per cent or more below the normal during a single year. 

 The species which inhabits the cones of Pinus strobus was de- 

 scribed by Mr. E. A. Schwarz^ as Pityophthorus coniperda. 



The first reference to the habits of a representative of the 

 group was published by A. S. Packard in the fifth report of the 

 U. S. Entomological Commission, 1890, page 810, under the 

 name Dryocoetes affaber Mann., and later Dr. Harrington^ 

 and Dr. Hamilton* pubhshed notes under the names Dryocoetes 

 affaber, D. autographus, and Pityophthorus coniperda. 



The other species, while recognized by the writer as ^new and 

 as representing an undescribed genus, have not been described, 

 because it was intended to include them in one of the parts of 

 a monograph. 5 



1 Contribution from the Branch oi' Forest Insects, Bureau of Entomology 

 U. S. Department of Agriculture. 



2 Proc. Entom. Soc. Washington, 3: 143-145. March 28, 1895 

 'Canad. Entom. 23: 26-27. 1891. Also, Ibid. 34: 72-73. 1902. 

 *Ibid. 25: 279. 1893. 



^ Contributions toward a monograph of the scolytoid beetles, of which have 

 been published: Tech. Series No. 17, Part I, 1909, and Part II, 1915, Bureau of 

 Entomology, U S. Dept. Agric; Proc. U. S. National Museum, Vol. 48, pp. 

 115-136, 1914; and Report 99, Office of the Secretary, U. S. Dept. Agric, 1915. 



