OF THE UNITED STATES. 



Two specimens, San Jose, California. Approaches wry closely what 1 consider as C. 

 ventricosus, but the thorax is much more rounded on the sides, which are stronglj sinuate 

 towards the posterior angles, while in C. ventricosus they converge obliquely, and arc 

 scarcely sinuous in their outline. 



C. c o r d a t u s, niger, nitidus, thorace cordato, lateribus valde rotundatis, postice sinuatis, angulia 

 posticis rectis, elytria minus convexis, thorace plus Besqui latioribus, apice acuminatis, profondo 

 nato-striatis, interatitiis vix tnterruptis. Long. '48. 



One male, San .lose. California. This species is closelj allied to the preceding, hul in 

 comparing the same sex. the elytra arc so much less convex, more parallel, and les 

 clivous at the extremity, that I am obliged to consider them as distinct specii 



C. bicarinatus, niger, Bubpurpurascens, tboracc rotunda to, latitudine nor -i trun- 



cate, punctato, ct utrinque valde profunde iuipresso; elytria planiusculis, confertim 



nato-striatis, versus apicem ct latera tuberculis nitidis granule versus marginem acute ele- 



vata postice abbreviata, ornatis. Long. "6. 



\ fine species, of which I found but a single specimen in Habersham Co., Georgia. It 

 r< sembles ('. niagarensis, hut the thorax is not wider than its length: the elytra are more 

 tuberculate posteriorly, and the acutely elevated costa, near the margin, extending from 

 near the base to within one fifth of the apex at first sight distinguishes it. 



Now \ki.i i s Lee. 



rnstrumenta cibaria et alia, Bicut in Cychris; differt tamen antennarum articulia duobus terti 

 basi glabris; tarsi maris antici levi elytra Ll-striata. 



These species, although very similar to Cychrus, differ so remarkably in the antennae 

 and the number of stria? of the elytra, that I have thought it necessary to si parate them. 

 In ( \ i hrus the firsl four joints of the antenna? are entirety glabrous, and the elj tra have 

 at least fourteen striae on each. 



The three species resemble in appearance the small Cychri from Western America, 

 rather than those of the Atlantic side. 



1. N. b i 1 o b u s, purpureo-seneus, tho o, valde canaliculato valde ai 



:tato, et vald rsim impresso, angulia posticis obtusis, elytria striia I I profun 



Loi _■■. '52. 

 hrus bilobus Say, Tra .. . Lee. Ag Lac. Sup. 208, tab. 8, I 



S >is bilobus I'.j. Sp. ' ren. 2, 16. 



I ike Superior and < >hio. 



-'. N. I ger, nitidi Ide c inaliculato, pi ito, prof ■ 



transversim impn ; Bplendide violaci 11 profunde 



apice minus impreaais. Long. ■ 12. 



One specimen, Illinois; Mr. Willcox. Easily distinguished by the thorax being impunc- 

 tured, and by the punctures of the striae of the elytra being larger and less 'I"-' : the 

 thorax i- |i -- narrowed behind than in \. bilobi 



:'.. N. debilia, niger, nitidus, thorace latitudine longiore, modice canaliculato, i 

 vor.. \. 



