20 LE CONTE.— GOLEOPTERA OF THE 



Pelecyphorus costipennis, piceo-niger, sordidus, opacus, thorace latitudine plus duplo breviove, lateribus 

 valde rotundatis depressis, undique dense grosse confluenter punctate, ad basin late emarginato angulis 

 posticis' productis acutis, elytris breviter ovatisconvexis, postice valde declivibus, sutura costis duabus 

 ante apicem connuentibus margineque valde elevatis, interstitiis valde inaequalibus, epipleuris parce, 

 punctatis, abdomine dense punctato. Long. -60 — -80. 



Arizona, Dr. "Webb. Also related to P. sordidus, but the thorax is compara- 

 tively larger, with the posterior angles more elongated and acute. The elytra are 

 wider, with the costse more elevated. 



Eusattus productus, subcylindrico-ovalis, postice acutus, niger, thorace elytris latiore brevi modice 

 convexo, vix subtilissime punctulato, postice valde bisinuato, angulis posticis acutis, lateribus fortiter 

 depresso-marginatis, elytris inordinatim parcius muricato-punctatis, tibiis anticis serrulatis, angulo 

 externo parum producto. Long. "44 — -52. 



Arizona, Mr. Schott. Comparatively narrower than E. d u b i u s Lee, much larger, 

 with less convex and scarcely punctured thorax, and more distinctly punctured elytra; 

 the latter exhibit a faint tendency to become sulcate, and the punctures are very 

 obviously muricate : they are nearly parallel on the sides for three-fourths of their 

 length, then narrowed obliquely to the apex which thus appears nearly acute. 



Embaphion contusum, atrum opacum, thorace latitudine fere duplo latiore, antice profunde emarginato, 

 lateribus valde rotundatis, disco parum convexo, parce punctato, margine lato explanato modice reflexo, 

 angulis anticis subacutis, posticis latis obtusis valde rotundatis, basi media recte truncata, elytris dorso 

 planis, postice valde declivibus, et acute angustatis, thorace vix latioribus fortiter reflexo-marginatis 

 seriatim subtilius sat dense muricato-punctatis, ad apicem singulatim breviter acuminatis ( $ ) vel in cauda 

 brevi prolongatis ( % ). Long. -55 — -65. 



Fort Laramie and Santa Fe. Though differing very much in form from the Helaeus- 

 like E. muricatum Say, the form of the antennas, oral organs and legs require it to be 

 associated in the same genus with that species. 



Two specimens brought by Dr. Thos. H. Webb from Arizona differ in having 

 the side of the thorax much more strongly reflexed, so that that part becomes con- 

 siderably narrower than the elytra. This is probably merely an individual varia- 

 tion, as similar differences occur in Cychrus elevatus, as in many other insects in 

 which the margins of the body are widely reflexed. 



Khipiphorus puncticeps, niger capite dense punctato, occipite obtuse rotundato, thorace rufo scabro- 

 punctato, lobo scutellari ad apicem impresso, elytris confertim grosse punctatis introrsum late impressis, 

 testaceis, puncto humerali, gutta ad medium apiceque nigris, abdomine sanguineo ; antennis rufis extror- 

 sum fuscis. Long. -35 — -40. 



Three specimens agreeing in color, from Llano Estacado, Capt. Pope. Differs from 

 our common, much varying species, called R. varicolor by Gerstaecker, (but which 

 should rather be named R. pectinatus Fdbr., that being the earliest name given 

 to the species,) but differs by the head being uniformly densely punctured, by the an- 



