AND EASTERN NEW MEXICO. 16 



Found near the Rocky mountains from Platte river to Santa F^, and westward 

 as far as Tucson. Larger than E. convexiis Lee, and less convex ; the sides of the 

 thorax are not suddenly depressed behind the middle as in that species. 



EITIBAPHIOIV Say. 



E. COlltllMllin, atrum opacum, thorace latitudine fere duplo latiore, antice profunde emarginato, 

 lateribus valde rotuudatis, disco parce punctato, parum convexo, ruargine late explanato modice 

 reflexo, angnlis auticis subaeutis, posticis latis obtusis valde rotimdatis, ad basin medio recte trun- 

 cate, elytris dorse planis, postice valde "declivibus at acute angustatis, thorace vix latioribus, fortiter 

 reflexo-marginatis, seriatim subtilius sat dense muricato punctatis, ad apicem singulatim breviter 

 acuminatis (9), vel in cauda brevi prolongatis ( ). Long. '55 — '65. Tab. I, fig. 8. 



Lec. Journ. Acad. Nat. Sc, Philad., 2d ser. IV, 40. 



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

 Helseus like E. muricatnm Say, the forms of the antennre, oral organs and legs re- 

 quire it to be associated with that species. The figure given saves the necessity of 

 a long description, while the diagnosis above will enable the species to be readily 

 recognized. 



Two specimens found by Dr. Webb, near the Mexican boundary, differ in having 

 the sides of the thorax much more strongly reflexed, so that that part becomes 

 much narrower than the elytra. This is, probably, merely a local variety, as simi- 

 lar differences occur among individuals of Cyclirus elevatus, and in many other 

 insects which have the margins of the body widely reflexed. 



BL,APSTI]\US Latr. 



B. prateniiiii^, elongato-ovalis convexus, ater opacus, breviter subtiliter fusco-pubescens, capite 

 thoraceque punctatissimis, hoe latitudine sesqui breviore, lateribus late retundatis, ad apicem emar- 

 ginato, angulis anticis acutis ad basin sinuate, angulis posticis rectis, elytris striis fortius punc- 

 tatis, interstitiis paulo convexis, punctulatis. Long. -20 — '23. 



Platte River Valley, abundant. Differs from the Californian B. puhescens Lec, 

 by the finer pubescence, by the more widely rounded sides of the thorax, and by 

 the more prominent anterior angles. 



B. vestitus, elongato-ovalis, convexus, a;neo-niger, pube albida minus subtili dense vestitus, capite 

 thoraceque confertim punctatis, hoc latitudine vix breviore, antrorsum paulo angustato, lateribus 

 late retundatis, ad apicem emarginato, angulis anticis acutis, ad basin sinuate, angulis posticis 

 rectis, elytris striis punctatis, interstitiis planis punctulatis. Long. -20. 



Two specimens from Platte River Valley. Very closely allied to the preceding, 

 but the coarse pubescence, and the flattened intervals of the elytra seem to be suffi- 

 cient characters for separating it. 



CE]^TRO]\OPUS SoLiER. 



C. opacil!ii, elongatus, niger opacus, capite postice punctato, fovea verticali notato, antice concave, 



epistomate late rotundato et fortiter marginato, thorace quadrate, antice vix angnstiore, lateribus 



parum retundatis, angulis posticis acutis, parum convexo, parce punctate, elytris striis e punctis 



parvis censtitutis. Long. '57. 



One male; Black Hills, Dr. Hammond. Differs from the Mexican C. mppressus, 



according to description, by being opaque, with finer elytral striaj. The sexual 



