308 



REVISION OF THE TENEHRION ID/E OF AMERICA, 



Following the Pediniform species, we have another suh-scction still having the ante- 

 rior spur of the anterior tibia larger than the posterior, hut differing especially in the form 

 of the elytra. In these the humeral angles of the elytra are hut feebly prominent, and 

 the base feebly emarginate ; the elytra themselves are always convex, never flattened and 

 sub-acute on the margin. The thorax is usually narrowed at base, the angles never 

 prominent nor overlapping the elytra] base. 



E. oarbonaria, Say, (Blaps) .Tourn. Acad. 3, 200; Lee. (Eleodes); soror, Lee., Proc. Acad. 1858, 185; immunii, 

 Lee, ib., 18G; debilis, Loc., ib., 185. 



This species as above defined may be known from all the others of the sub-section by 

 the smooth, polished elytra, with, rows of large punctures rather distantly placed, the in- 

 terstices of the rows are flat. In some specimens the punctures arc small, though in 

 other respects the characteristics of the species, such as the polish, the distance between 

 the rows, are still present. In some specimens of quadricollis there is an evident ten- 

 dency to the arrangement of the punctures in rows ; in these, however, the interstices 

 will be seen to be very distinctly diffusely punctured, besides lacking the peculiar appear- 

 ance of carbonaria, readily remembered after sight. 



I have united several other species with carbonaria, as may be seen above. Of these, 

 I am absolutely unable to distinguish even as faint varieties, soror and immuuis. Debilis 

 is a very small form from the mountainous region around Santa Fe, and differs from the 

 typical form only in having the thorax slightly more transverse and widest at the middle, 

 while the others have the thorax widest in front of the middle. From the known degree 

 of variation of other species and from the fact that this possesses all the other characters 

 of the species, I am unwilling to retain it as distinct. 



The species is rather abundant in southern Colorado, New Mexico and eastern Ari- 

 zona and Texas. 



Length .(55-1.00 inch. 



E. obsoleta, Say, (Blaps) Journ. Acad. 3, 261, (Eleodes) Lee. 



This species has inutic femora also, and maybe known by the sulcate or striate elytra. 

 The suture is frequently reddened, the stria? are marked with coarse punctures and the 

 interpaccs coarsely muricately punctured. The form is usually robust, occasionally elon- 

 gate in the males, elytra rather broadly oval and feebly convex on the disc. As in car- 

 bonaria, the thorax is sub-quadrate, sides and base feebly rounded, anteriorly very feebly 

 emarginate. 



Occurs abundantly on the plains of Kansas and southward to New Mexico. 



Length .50-80 inch. 



E. quadriooll is, Esoh., Zool. Atl. III., p. 12, tab. 14, fig. 5. Mann., Beitrag, 208; omnia, Leo., Pi-oe. Acad. 

 1858, 180; vidua, Lee., Ann. Lye. 5, 133. 



Very similar in form to obsoleta. The elytra are more convex, totally black, with 



