NORTH OF MEXICO. 



319 



E. seriata, Loo., Proc. Acad. 1858, p. 185. 



The elytra of this species are frequently inflated in the female, always very convex 

 and without any semblance of even an obtuse margin. Their sculpture consists of distant 

 rows of large and rather distant punctures. The anterior femora of the male are armed 

 with an obtuse tooth, and the two basal joints distinctly thickened and dilated. 



Occurs in New Mexico and Texas. 



Length .66-80 inch. 



E. subnitens, Loo., Ann. Lyo. 5, 184. 



Similar in form to seriata, but less robust and more fusiform. The elytra! margin is 

 regularly rounded, as in the preceding species. The surface is sub-opaque and the sculp- 

 ture of distant stria: of fine punctures. The male has an acute tooth to the anterior fe- 

 mur, and the two basal joints very distinctly thickened. 



The unique specimen came from the region of Arizona traversed by the Gila Eiver. 



Length .70 inch. 



E. striolata, Leo., Proo. Acad, 1858, p. 185. 



It is not without some misgivings that I place this species in the present sub-genus. 

 Three specimens are known to me, all females. The anterior spurs of the anterior tibia' 

 in all the species of Promus, are similar in structure to that seen in kSection 13, Group I. 

 Eleodes, thus increasing the difficulty of assigning places in the genus to females when 

 the male is unknown. The anterior femora of the specimen before me arc very feebly 

 sinuate, and should the male prove to have simple tarsi and a toothed femur, the species 

 should be placed near extricata. As in the two preceding species, the basis of elytra are 

 very feebly emarginate, the angles acute, neither prolonged nor clasping the thoracic base. 

 The surface is marked with approximate stria: of rather fine punctures. The apex of 

 elytra is faintly prolonged, witli the tips of the elytra slightly separated. 



Occurs in southwestern Texas and adjoining regions of Mexico. 



Length .65-77 inch. 



DISCOGENIA, Lee. 

 Disoogenia, Loo., Now Spec. 117. 



'Ibis genus differs from Eleodes by very feeble characters, the value of which may be 



at any time lessened by the discovery of intermediate forms. The "mentum is quite flat, 



not at all trilobed, but transverse, widened from the base to the middle, then rounded, 



both at the front and sides, the lateral angles being also rounded at tip; the surface is 



punctured and is foveate on each, side near the angle." The epipleuree of the elytra, as in 



Eleodes, arc rather suddenly dilated at base and are slightly visible from above. The 



tarsi are similar in both sexes and rather coarsely spinous beneath. The tibial spurs are 



similar in the sexes and nearly equal. 



