172 AMERICAN COLPX)PTERA. 



lower than usual, crowded near the base, separated by approximately their own 

 diameters (though irregularly disposed) ou the middle of the disk. Abdomen 

 alutaceous, scarcely shining, sparsely punctured and pubescent. Legs moderate. 

 Length 2.6 mm. 



The irieasurement cited above, is that of the type, which belongs 

 to the United States National Museum. Another specimen, which 

 I have been allowed to retain, is slightly smaller, while a third, 

 probable a female, is a trifle larger. This last mentioned specimen 

 is somewhat differently colored, the elytra being slightly infuscate at 

 tip, and the entire upper surface of the body less shining. The 

 abdomen in this last specimen is piceous, and it may perhaps not 

 belong to the same species, since it differs also in not having evident 

 craterform elytral punctures. 



Collected in the Panamint Valley, California, by Mr. Koebele, 

 during his connection with the Death Valley Expedition, and listed 

 as Tanarthrus n. sp. by Mr. Linell in his report on the beetles of 

 that region. The label bears date of April, 1891. The application 

 of the specific name will be evident enough to one who Jias had ex- 

 perience in the district whence the species came. 



T. alntacens Lee. ^Narrow, slightly convex, feebly shining, black, an- 

 tennae and legs more or less piceous. Pubescence fine, short and sparse. Elytra 

 one-half longer than wide, with sparsely placed shallow craterform punctures 

 among the fine interstitial ones. Length 2.2 mm. 



Easily recognized by the small size, dark color and feeble sculp- 

 ture. It is found in California, my specimens coming from Redondo 

 (March and June) and San Diego County (March). They were 

 given me by Mr. Fall. 



BIBLIOGRAPHY. 

 T. brevipennis Casey, Ann. N. Y. Acad. Sci., viii, 1895, 751. 

 T. nnbifer Casey, loc. cit.. 752. 

 T. virginalis n. sp. 

 T. mormon n. sp. 

 T. inyo n. sp. 

 T. salicola LeConte, Trans. Am. Ent. Soc, v, 1875, 174 (Tanarthrus); Casey, Ann. 



N. Y. Acad. Soi., viii, 1895, 754; tricolor Casey, loc. cit., 753. 

 T. densas Casey, loc. cit., 754. 

 T. infernalis n. sp. 

 T. alutacem LeConte, Ann. N. Y. Lyceum, v, 1851, 155 (Anthicus) ; Proc. Acad- 



Nat. Sci. Phil., vi, 1852, 104 (Tanarthrus) ; Casey, Ann. N. Y. Acad. Sci., 



viii, 1895, 755. 



