1855.] 297 



nigricante, lateribus marginatis, cum elytris angulum haud formantibus, his 

 punctulatis nigris, vittis duabus margine apiceque flavo-testaceis, vitta externa 

 ad humerum cum margine confluente. Long. -16. 



Fort Laramie, Nebraska. The form of body is exactly that of H. undulatus, 

 and the epistoma is very obsoletely transversely impressed, as in H. mixtus 

 above mentioned, but cannot be said to be margined. The inner vitta of the 

 elytra does not reach the base, but be ids a little outwards at its extremity; to- 

 wards the tip it is nearly confluent with the apical spot ; the outer vitta com- 

 mences at the humerus, where it is confluent with the margin, and ends at nearly 

 one-fourth from the tip ; in or e specimen it is also confluent with the margin at 

 its posterior extremity. The punctuation is a'ike in all the specimens seen, but 

 it is quite likely that the females are more finely punctured, less shining and 

 more pubescent. 



35. H. vi ti o su s, ovalis, longior parum convexus, subtilissime punctulatus 

 postice subattenuatus, subtiliter pubescens, niger, capite thoracisque lateribus 

 obscure ferrugineis, hoc lateribus marginato, cum elytri3 angulum haud formante, 

 his nigris margine angusto basali, fasciis undatis duabus interrupts (pnsteriore 

 indistincta) margine laterali apiceque testaceis, pedibus runs. Long. -15. 



One specimen from Illinois ; Mr. Willcox. Of the same form as H. mixtus, 

 from which it is distinguished by its black under surface. The bands of the 

 elytra are placed a3 in H. undulatus and its allies, but are much inrerrupted, 

 and of the posterior one only the lateral spot and a very small discoidal dot are 

 visible ; the basal margin is testaceous towards the scutellura. The dark red of 

 the thorax fades imperceptibly into black, in such manner as to induce me tr> 

 believe, that specimens will be found having a red thorax, with only the basal 

 margin blackish. The males are probably more distinctly punctured. 



41. H. n i g e r. What I consider as Say's species resembles extremely in form, 

 sculpture and color, H. punctatissimus, but is a little more obtuse anteriorly, 

 and equally attenuated behind ; it may be distinguished by the lateral margin of 

 the thorax being hardly conspicuous, while in H. punctatissimus it is 

 broad and thickened. The head is more finely punctulate, and the epistoma is 

 not margined. 



47. H. subtonsus, longior ovalis, parum convexus, parce pubescens, niger, 

 ore rufescente, thorace lateribus vix marginatis rufescentibua cum elytris an- 

 gulum obtusum formantibus, angulis posticis rectis, disco parce subtilius, ad basin 

 ct latera distinctius puuctato, elytris stepe testaceo-piceis, modice punctatis, 

 pedibus rufo-testaceis. Long. -125. 



Lake Superior and Vermont. Resembles in appearance H. varians and H. 

 puberulus, and likely to be confounded with them. H. varians is narrower and 

 more oblong, the sides being almost parallel at the middle, and is entirely gla- 

 brous. H. puberulus has the posterior angles of the thorax obtuse and very 

 distinctly impressed. The elytra of the female are less shining and le^s deeply 

 punctured than those of the female. 



53. II. c o 1 1 ar is, piceo-testaceus, longior ellipticus parum convexus, glaber, 

 thorace lateribus rotundatis fortiter marginatis cum elytris angulum obtusis- 

 simum formantibus, parce punctulato, grossius ad ba^in, elytria minus dense 

 punctatis, punctis postice subtilioribus. Long. -14. 



Two specimens; Lake Superior. The usual discoidal row of punctures on the 

 elytra is more distinct than usual towards the base of the elytra; the apical row 

 of punctures on the thorax is likewise well marked. 



55. H.concinnus, longior ovalis postice attenuatus, parum convexus, 

 glaber, subtilissime punctulatus niger, capite, pedibus. ano, thoraceque ferru- 

 gineis, hoc ad apicem late ad basin anguste nigricante, lat ribus tenuit-r mar- 

 einatis cum elytris angulum haud formantibus, his nigri.-, macula quadrata 

 humerali, fasciis angulatis duabus, margine apiceque testaceis, stria suturali 

 punctorumque serie dorsali dlstinctis. Long. -14. 



