4 COLEOPTERA OP 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. sf riatuIUMS, nigrum, capite thoraceque nitidis leviter rugosis, hoc brevi, versus latera et basin 

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

 subrotundatis, dense striatis, iuterstitiis 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 strife 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. hixaiion ; 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 elj^tra are one-half wider than the thorax, about one-fourth 

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

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

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



II.YBIIJS Er. 



I. Liai*ainaeU!ir, elongatns ovalis, autice paulo obtusus, nigro-aeneus, nndique subtiliter dense 

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

 pedibusque anterioribus piceo-rufis, jjedibus posticis uigro-piceis. Long. -37 — ■4L 



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 I. ^-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. 



AGABrS Leach. 



A. claTattlS, elongato-ovalis, niodice eonvexus, piceus uitidus, obsolete punetnlatns, capite, thoracis 

 eljtrorumque lateribus scnsim rufo-piceis, pedibus autennisque ferrugiueis, his articulis externis 

 dilatatis, 9-11 nigro-piceis. Long. -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 antennae are gradually wider; the 8th, 9th, and 10th are 

 subrectangular, wider than long, and as wide as the 7th; the 11th is oval and 

 pointed, narrower than the 10th. 



