AND EASTERN NEW MEXICO. 



11ISTER LINN. 



II. instrntlis, quadrato-ovalis, niger nitidus, thorace ))istriato, latcribus dense flavo-ciliatis, elytris 

 stria suturali utriuque abbreviata, tribus externis integris, marginali brevissiraa, rudiraentalique ad 

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

 ticis compressis biscriatim spinnlosis, femoribus posticis majoribus rubro-tinctis. Long. -24 32. 



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

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

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

 thighs, and the more numerous spines of the posterior tibice 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 //. biplagiatus, they are distant and 

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



H. nubilllS, rotuudato-ovalis, niger, nitidus, thorace bistriato, stria externa margin! approximate, 

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

 antice abbreviata, epiplcuris striis duabus punctatis, striolaque brevi infcrna ; mesosterno fere 

 truncate ; pygidio sat dense punctato, tibiis anticis sub-5-dentatis. Long. -25. 



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

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

 elytral marginal strice wanting. 



H. poll ill II*, rotundato-ovalis, niger nitidus, thorace bistriato, stria externa margine approximata 

 ante basin abbreviata, elytris striis externis 3 integris, 4ta ad medium postice abbreviata, 5ta 

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

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



Kansas and New Mexico. 



SAPRIi\US LEACH. 



S. s pure us, quadrato-rotundatus, asneo-niger, nitidus, capite punctulato, thorace lateribus dense 

 punctatis, antice vix obsolete impresso, margine lateral! sublu;vi, elytris striis dorsalibus oequalibus 

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

 ral! fere juncta; punctatis postice subaciculatis, spatio scntellari quadrato, margineque lateral! 

 Iambus, epipleuris bistriatis punctatis, tibiis antieis 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 epipleune bistriate, 

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

 prosternal striae parallel, abbreviated in front. It is closely related to S. lugens, 

 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. pai Hliiplinctatus, rotundatus, nigro-aeneus nitidus, parce punctulatus, thorace latcribus et 

 basi confertim punctato, antice haud impresso, elytris striis paulo pone medium abbreviatis, a?quali- 

 bus, 4ta cum suturali integra conjuncta, marginali brevi, postice haud dense punctato, pedibns 

 rufis, tibiis anticis denticulatis. Long. 13. 



One specimen: Platte river. Resembles S. conformis, and placldus, but differs, 

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



