318 



REVISION OF THE TENEBKIONID./E OF AMERICA, 



E. pimelioides, Maim., Beitrag. 274; Mag. Zool. 184;?, pi. 120; viator, Leo., Proo. Acad. 1858, p, 188; tuUi- 

 f/itta, Lee, Pacif. R, R. Rep., App. 1, p. 50. 



The elytra of this species are more opaque than either of the preceding, and have rows 

 of small rounded tubercles placed in rather regular series, less distinct along the suture. 

 The form of thorax is similar to the preceding, and is coarsely and conftuently punctured. 



Abundant in Oregon and Montana, and is distributed in the same manner as nigrina, 

 except that it does not extend into New Mexico. 



Length .38-54 inch. 



In all the species of this sub-genus the middle lobe of the mentum is rather broader, 

 more obtuse in front (except clavicornia\ and the lateral lobes much less evident than 'in 

 the normal Eleodes (sub-gen.) In chivicomis the middle lobe is rather prominent and 

 more produced. 



Sub-Genus Piiomus. 



The first and second joints of the anterior tarsi of the male are thickened and flat- 

 tened beneath, and densely clothed with a very fine almost spongy pubesence. Combined 

 with these there is a peculiar more or less fusiform outline to the species. The sides of 

 the thorax always converge anteriorly, and the elytra become gradually broader in the 

 same line with the sides of the thorax. 



E. opaea, Say, (Blaps) Joura. Acad. 3, p. 202; (Eleodes) Lee.; (Promus) Lee., Class. Col. N. Am., p. 220. 



In this species the dorsum of elytra is quite flat, the margin rather acute, the surface 

 is opaque and sparsely covered with short recumbent setose hairs. The base of elytra is 

 deeply emarginate, the angles clasping the obtuse basal angles of the thorax. The first 

 two joints of the anterior tarsus of the male are distinctly broader. The femora are un- 

 armed. 



Occurs abundantly on the plains of Kansas and Colorado. 



Length .42-.50 inch. 



B. fusiformis, Lcc., Proc. Acad. 1858, p. 184. 



Similar in form to the preceding. The dorsum is, however, much less flattened and 

 the margin not acute. The surface is black and shining, neither opaque nor pubescent, 

 but rather finely and closely sub-seriatcly punctured. The elytral humeral angles clasp 

 the angles of the thorax. The femora are mutic. The joints of the anterior tarsi can 

 hardly be called dilated, still their vertical measurement is greater than that of the female, 

 in which the joints are nearly cylindrical There need be no doubt as to the position of 

 the species, its peculiar form and produced humeral angles show its relationship with 

 opaea. 



Occurs rarely, on the plains of Nebraska, southward through New Mexico, and is 

 more abundant, though by no means common, in Texas. 

 Length .50-.60 inch. 



