10 COLEOPTERAOFKANSAS 



jointed antennae and simple ungues. The rough sculpture and short sparse pubes- 

 cence give the insect very much the appearance of an Ochodwus. 



I>. nidi*, ferrugineo-fuscus, oblongus, parum nitidus, pilis brevibus minus subtilibus, albidis minus 

 dense Yestitus, capite punctate, hemihexagono, clypeo antice latins emarginato, thorace convexo 

 antrorsnm angustato, lateribus valde rotundatis, dense punctate, elytris rugose punctatis, sutura 

 costisque solitis tribus parum elevatis, pygidio confertim punctate. Long. '30. 



Two specimens from the black hills: Dr. W. A. Hammond. The punctures are 

 large and not deep. The body beneath is more shining, and less densely punctured. 



OiVIORGIJS ER. 



O. SClltellariSj apterus, niger, thorace cataphracto valde inajquali, lateribus rotundatis, elytris 

 seriatim minus distincte punctatis, transversim caslatis, interstitiis subquadratis, subrequaliter 

 parum elevatis. Long. -6 '65. Tab. I, fig. 4. 



LEC. Proc. Acad. Nat. Sc. VII, 214. 



Trox scutellaris SAY, Journ. Acad. Nat. Sc. Ill, 238. 



From Platte river to Santa Fe. Other nearly allied species found in Texas are 

 described by me in the place above cited ; from all of them, however, it may be 

 distinguished by the assemblage of characters here given. 



CAUiTHOI ILLIGEE. 



C. praticola, snbovatus, ater opacus, supra subtilius licet evidenter granulatus, clypeo 6-dentato, 

 dentibus duobus mediis obtusis, reliquis latis modice prominulis, thorace brevi convexo, lateribus 

 valde rotundatis, elytris capite thoraceque vix longioribus, basi late emarginatis, lateribns et apice 

 rotundatis, planiusculis versus seutellum paulo impressis, striis parum distinctis ; thorace snbtus 

 versus angulum anticum tuberculo minuto marginali instructo, pro receptione pedum parum exca- 

 vato, pygidio convexiusculo, parce subtiliter granulate. Long. -27 "37. 



Kansas and New Mexico. Resembles C. nigricornis, but the form is less abbre- 

 viated, the lateral teeth of the clypeus are more prominent, the elytra are less 

 sparsely granulate, and the pygidium is more finely granulate, not impressed or 

 carinate towards the base. 



For the purpose of enabling the relations between the species of Cantlum inha- 

 biting the United States to be understood, as well as of providing names for several 

 nondescript species, I add the following synoptic table : 



A. Prothorax pleuris linea transversa a coxis procedente obsoleta vel nulla. 



a. Prothorax pleuris margine versus angulum anticum tuberculo minuto subinterrupto. 



* Clypeo rotundato, bidentato ; (species magnse). 



rotundatus supra grannlatus, oculis latiusculis vigilans. 



rotnndatns, oculis angnstissimis ; 



supra evidenter granulatus lieris. 



obsolete granulatus chalci/es. 



** Clypeo 6-dentato; (species minores). 

 Pygidio rude granulate, basi plus minus carinato ; 



clypei dentibus omnibus magnis ; 



oblongo-rotundatus, supra rude granulatus ebenus. 



rotundatus, supra subtilius granulatus depressipennis. 



clypei dentibus lateralibus minus prominulis ; 

 breviter rotundatus, supra subtiliter, elytris parcius granulatus nigricornis. 



