158 DESCRIPTIONS OF NEW SPECIES, 



and thorax being less distinctly channelled. The antennae are 

 rather shorter, and slightly less slender. 



I have seen no males belonging to this form, and but one of 

 Lytia conspersa Lee. ; but have observed in the typical specimens 

 of E. maculata that the denuded spots are much larger in the 

 females than in the males, and therefore conclude that the differ- 

 ences being of a comparative nature, the present species, as well 

 as the one just named, should be regarded as races of E. maculata. 



460. E. sericaiis. Nigra, pube cinerea minus subtili dense vestita ; 

 capite thoraceque sat dense, elytris densius punctatis, thorace campanu- 

 lato, latitudirie parum longiore, canaliculate, basi marginata ; autennis 

 nigris, capite thoraceque baud longioribus, articulis externis arete appli- 

 catis. Long. '30 -43. 



Kansas, New Mexico, and Texas ; abundant. Allied to E. 

 ferruginea, but the pubescence is much coarser, and cinereous 

 instead of fulvous ; and the thorax is less elongate. Otherwise 

 but little difference is observed. 



461. E. pruinosa. Nigra opaca, pube brevi subtili minus dense 

 vestita, capite thoraceque subtiliter confertim punctatis, hoc campanu- 

 lato, latitudine baud longiore, subtiliter canaliculate ; elytris thorace 

 sesqui latioribus subtilissime scabro-punctatis ; antennis nigris filiformi- 

 bus, capite thoraceque vi-x longioribus, articulis externis arete applicatis. 

 Long. -30 -44. 



Colorado Territory ; three specimens kindly given me by Mr. 

 Benj. D. Walsh. This specjes is allied to E. ferruginea, and 

 sericans, but differs by the pubescence being very fine, and not 

 dense, giving a leaden lustre to the surface. I can find no sexual 

 differences in the specimens. 



462. E. callosa. Nigra subnitida, pube Ifete fulva dense vestita, 

 capite thoraceque confertim punctatis, hoc campanulato, latitudine 

 paulo longiore, canaliculate, callo utrinque ovali nitido laevi ornato ; 

 elytris thoraoe sesqui latioribus, dense subtiliter rugose punctatis ; an- 

 tennis nigris capite thoraceque paulo longioribus, filiformibus, articulis 

 externis arete applicatis. Long. .37 '44. 



Texas, Mr. A. Salle; Nebraska, Mr. Ulke. There are five 

 specimens before me, in which I can detect no sexual differences. 

 This species is more slender than E. sericans and pruinosa, being 

 of the same form and color as E. ferruginea, from which it differs 

 by the smooth callus each side of the thorax, midway between the 

 apex and base, and equally distant from the side and the medial line. 



