306 REVISION OF Tin: TBNEBRIONID.S OF AMERICA, 



indistinct striae, with the whole surface rather densely and very irregularly muricately 

 punctured. The anterior femora are armed in both sexes with a tooth, strong and acute 

 in the male, verj obtuse in the female and occasionally reduced to a mere sinuation. 

 This form occurs in New Mexico. Length 1.25 inch. 



obscura,Sa ices already given). 



Differs from the preceding as follows: Elytra Feebly sulcate, interstices convex and 

 rather sparselj muricately punctured, the more densely in the stria'. This race is also 

 smaller and shows more tendency in the elytra to become reddish brown than the others. 

 I' agrees in everj respect with dispersa excepting the elytral sculpture. Its habitat is 

 more northern than the preceding, occurring in Nebraska anil Colorado. 



Length 1 .05 inch. 



sulcipenuis, Mum.. Beitrag. 226; Mag. Zool. 1843, pi. 128; arata, Lee, Proc. Acad. 1858, p. L82. 



This form is still more deeply sulcate than the preceding and has smoother interstices 

 with fewer muricate punctures. 



Specimens occur very abundantly in Oregon, northern California, and through Nevada 

 and Colorado to New Mexico and Arizona. 



Length hardly varying from 1.25—1.30 inch. 



E. acuta, Say, Blaps Journ. Acad. ::. p. 258. Am. Ent. tab. 16. Esch. (Eleodes . 



The form of this species is not greatly different from the preceding. The only con- 

 stant character being in the greater acuteness of the elytral margin, especially near the 



humeral angle. The dorsum of elytra is more or less flattened, and in proportion to the 

 extent of this depression the margin is more extended from the humeral angle until it is 

 almost as evident, though never so acute as in the following species. The thorax is simi- 

 lar in form to ohscura and lacks entirely the flattening and very acute margin of suturalis. 

 The anterior femora are toothed, the female the more obtuse. The species occurs from 

 Kansas to Texas and varies in length from 1.-1.40 inch. 



E. suturalis, Say, Blaps) Journ. Acad. 3, p. 257; Am. Ent. tab. 16; Escb. (Eleodes). 



The general form of this species agrees with the two already mentioned, differing, 

 however, in having both the thorax and elytra with a very acute margin, generally slightly 

 reflexed in the latter, always so in the- former, so that the dorsum appears either flattened 

 or concave, in accordance with the degree to which they are upturned. The sides of the 

 elytra are rounded, never parallel, tin 1 dorsum is always flat. The anterior femora are not 

 very acutely toothed, frequently merely sinuate. Occurs abundantly in Kansas and Xe- 

 braska, and varies in length from .8 to 1.2 inch. 



Man\ specimi ns have a broad red hand along the suture of the elytra. 



E. i ■■ \ a mi v. Lei ., Proc. Acad. 18C8, p. is?; Thomson, Arcana, 1. pi. XII. fig. .">. 



\cuti l\ margined as in the preceding. The thoracic margin is much wider and more 



