4 COLE OPT ERA OF KANSAS 



Platte river : on one occasion seen running on the ground in large numbers. 

 Wider and more robust than the other North American species. 



C. striatullllH, nigrum, capitc thoraceque nitidis leviter rngosis, hoc brevi, versus latera et basin 

 rugoso et punctate, postice paulo angustato, ad basin late emarginato, elytris thorace latioribus, 

 subrotundatis, dense striatis, interstitiis imbricatis, versus apicem tuberculis parvis confertis exas- 

 peratis. Long. -65. 



Milk river : one specimen found by Dr. Suckley, U. S. A., attached to the North 

 Pacific R. R. Expedition under Gov. J. J. Stevens; Utah, Mr. Drexler. This 

 species closely resembles C. Zimmermanni Lee., which is properly an Oregon 

 species, but differs in the head and thorax being much less punctured ; also in the 

 thorax being less narrowed towards the base, and in the stria; of the elytra being 

 more distinct. 



Body black ; head shining, finely but sparsely wrinkled and punctured, with the 

 frontal impressions moderately deep. Thorax shining, about one-half wider than 

 the head, twice as wide as its length, rounded on the sides anteriorly, obliquely 

 but only moderately narrowed to the base, which is broadly emarginate, with 

 prolonged basal angles ; the middle of the base is, however, truncate, and not 

 concave as in C. hixatum ; the sides are narrowly margined, the dorsal line is dis 

 tinct ; the sides are densely rugosely punctured, but the sculpture becomes indis 

 tinct on the disc. The elytra are one-half wider than the thorax, about one-fourth 

 longer than their width, covered with close set stria?, the outer ones of which are 

 indistinct; the interstices are transversely rugose, the rugce being deeper at the 

 sides and apex, so that the surface is there covered with small rounded tubercles. 



IL.YBHJS EK. 



I. Laramacus, clongatus ovalis, antice paulo obtusus, nigro-Eeneus, undique subtiliter dense 

 reticulatus, fere opacus, elytris striola submarginali, maculaque majuscula anteapicali pallidis, ore 

 pedibusque auterioribus picco-rufis, pedibus posticis uigro-piceis. Long. -37 41. 



Fort Laramie : narrower and less convex than our species found in the Atlantic 

 States, with the sides of the thorax less rapidly converging in front : resembling 

 more nearly in form the / ^-maculatus of Oregon; it is, however, less oval than 

 that species, with the sides less rounded, and the anteapical spot larger. The 

 specific differences in this genus are very unsatisfactory, and depend entirely upon 

 slight modifications in form, which cannot be clearly expressed in a description. 



AGABVS LEACH. 



A. davatllS, elongato-ovalis, modice convexus, piceus nitidus, obsolete pimctulatus, capite, thoracis 

 elytrorumque lateribus sensim rufo-piceis, pedibus antennisque ferrugiueis, his articulis exteruis 

 dilatatis, 9-11 nigro-pieeis. Long. &quot;34. 



Three males from Loup Fork of the Platte : Dr. Hayden. A most interesting 

 addition to our fauna, being the analogue of A. serricornis of Europe. The 5th, 

 6th, and 7th joints of the antennte are gradually wider; the 8th, 9th, and 10th are 

 subrectangular, wider than long, and as wide as the 7th; the llth is oval and 

 pointed, narrower than the 10th. 



