294 



REVISION OF THE TENEBRIONIDJ3 OF AMERICA, 



E. erosus, rounded oval, convex, black, moderately shining. Thorax scarcely punctured, except near the mar- 

 gin; margin slightly thickened; elytra with irregular shallow fovea:, interstices elevated, convex, smooth; inflexed 

 portion of elytra coarsely punctured. Length .71, breadth .44 inch. 



Our largest and one of our most distinct species, by the peculiar sculpture of the 

 elytra. This sculpture appears to result from an irregular coarse puncturing in series, 

 the interstices between the series and the punctures being elevated, rounded and smooth. 

 The elytra, therefore, have a somewhat coarsely eroded appearance. 



Collected by Mr. ¥m. M. Gabb, with the preceding species. 



E. lsevis, Lee., New Species, p. 118. 



From Cape St. Lucas, Lower California. ' In my cabinet are specimens collected by 

 Mr. Gabb in the same region, differing from the typical forms in the same manner that 

 the Arizona specimens oTretieulatus differ from those of Colorado, that is by being oboval 

 and with the elytra more convex and inflated. With this degree of variation demon- 

 strated by a full scries of our species, I am unwilling to separate a similar variation in 

 another as distinct, even though not possessing the intermediate forms. 



Length .52— .(54 inch. 



E. difflcilis, Lee, Ann. Lye. 5-133. E. convexns, Lee, id. 



I have in my cabinet a very good series of this species, sufficient indeed to render the 

 feeble characters separating difflcilis and convexns evanescent. 1 have others again 

 scarcely less smooth than nitidijpennis, Lee., from Jalapa, Mexico. It seems probable 

 that some further collections in regions between Arizona and Chihuahua would afford 

 specimens warranting the union of this species also. This species is not rare from San 

 Diego to Owens' Valley, and from Arizona, to New Mexico and Colorado. 



Length .35-45 inch. 



E. muricatus, Leo., Ann. Lye. V., 182. 



From Oregon, New Mexico, and Owens' Valley, Cal. 

 Length .45 inch. 



E. dilatatns, Lee, Ann. LyC. V., 132. 



From the deserts of the Colorado River. I am unable to see any difference between 

 this species and the preceding, except in the very dense fine punctulation of the epipleuree. 

 Length .30 inch. 



E. puberulus, Lee, Proe. Acad, 7, 84. Tcxn.s. 



Lifters from muricatus by the sparse scaledike hairs of the elytra. 

 Length .30 inch. 



E. dn hi us, Lee., Ann. Lye. V., 133. 

 Compinus dubius, Lee, Class. Col. N. A., 233. 



From the deserts of the Colorado and Gila. 

 Length .30 inch. 



