AND EASTERN NEW MEXICO. 



UISTER Li 



NN. 



H. instratllS, quadrato-ovalis, niger nitidus, thorace bistriato, lateribus dense flavo-ciliatis, elytris 

 stria suturali utrinque abbreviata, tribus externis integris, marginali brevissima, rudimentalique ad 

 basin interna notatis, macula utriuque lunata maxima rubra ornatis ; tibiis anticis bidentatis, pos- 

 ticis compressis biseriatim spinulosis, femoribus posticis majoribus rubro-tinetis. Long. -24 -32. 



Platte river : Intermediate between H. arcuatus Say, and K biplagkdus Lee, 

 having the elytral spot and compressed posterior tibiaB as in the latter, while by the 

 very densely ciliate margin of the thorax, the thick and sometimes reddish posterior 

 thighs, and the more numerous spines of the posterior tibia; it is evidently related 

 to the former. The outer series of spines is composed of numerous spines placed 

 irregularly in nearly a double row, while in H. Uplagiatus, they are distant and 

 regular ; the posterior tibioe are slightly less compressed than in that species. 



H. ntlbillif^, rotundato-ovalis, niger, nitidus, thorace bistriato, stria externa margini approximata, 

 ante medium abbreviata, elytris striis externis 4 integris, 5ta postica brevi, suturali ante medium 

 antice abbreviata, epipleuris striis duabus punctatis, striolaque brevi inferna ; mesosterno fere 

 truncate ; pygidio sat dense pimctato, tibiis anticis sub-5-clentatis. Long. -25. 



One specimen : Platte river. This and the next are very distinct from any of 

 our other species, in which the mesosternum is not distinctly emarginate, and the 

 elytral marginal stria3 wanting. 



H. polllitlis, rotundato-ovalis, niger nitidus, thorace bistriato, stria externa margine approximata 

 ante basin abl^reviata, elytris striis externis 3 integris, 4ta ad medium postice abbreviata, .5ta 

 obsoleta, suturali utrinque parum abbreviata, epipleuris 3-striatis; mesosterno fere truncato ; 

 pygidio parcius punctato, tibiis anticis sub-4-dentatis. Long. -20. 



Kansas and New Mexico. 



SAPRIIVUS Leach. 



S. spnrCllS, quadrato-rotundatus, teneo-uiger, nitidus, capite punctulato, thorace lateribus dense 

 punctatis, antice vix obsolete impresso, margine laterali sublcevi, elytris striis dorsalibus tequalibus 

 ad medium abbreviatis, interna cum suturali Integra connexa, marginali brevi obliqua cum hume- 

 ral! fere juncta; punctatis postice subaciculatis, spatio scutellari quadrato, margiueque laterali 

 lasvibus, epipleuris bistriatis punctatis, tibiis anticis sub-G-dentatis. Long. •14. 



One specimen : Platte river. Belongs to my division 4 (Proceedings Acad. Nat. 

 Sc. Phila. VI, 40), having the head not margined in front, the epipleurjB bistriate, 

 the prosternum transversely convex, with an anterior fovea on each side, and the 

 prosternal strije parallel, abbreviated in front. It is closely related to S. higens, 

 but is very considerably^ smaller, with the punctures of the elytra less aciculate, the 

 thorax scarcely impressed, and with the punctures of the sides not extending to the 

 lateral margin, which is only punctulate. 



S. pariiliipiinctatiis, rotundatus, nigro-^neus nitidus, parce punctulatus, thorace lateribus et 

 basi coufertim punctato, antice baud impresso, elytris striis paulo pone medium abbreviatis, a?quali- 

 bus, 4ta cum suturali integra conjuncta, marginali brevi, postice hand dense punctato, pedibus 

 rufis, tibiis anticis denticulatis. Long. •] 3. 



One specimen: Platte river. Resembles S. conformis, and placidus, but diflfers, 

 besides slighter characters above mentioned, by the punctures of the posterior 



