AND EASTERN NEW MEXICO. 



HISTER LINN. 



II. hi-lraf us, quadrato-ovalis, niger nitidus, thorace bistriato, lateribus dense flavo-ciliatis, elytris 

 stria suturali utrinque abbreviata, tribus externis integris, marginal! brevissima, rudimentalique ad 

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

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



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

 having the elytral spot and compressed posterior tibije 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 tibias 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. biplagiatus, they are distant and 

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



H. iniliilii*, rotundato-ovalis, nigcr, nitidus, thorace bistriato, stria externa margin! approximata, 

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

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

 truncato ; 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 striae wanting. 



H. pollllllis. 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 truncato ; 

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



Kansas and New Mexico. 



SAPRINIIS LEACH. 



S. spurcus, quadrato-rotundatus, seneo-niger, nitidns, capite pnnctulato, thorace lateribus dense 

 punctatis, antice vix obsolete impresso, margine laterali sublsevi, elytris striis dorsalibus aeqnalibus 

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

 rali fere juncta; punctatis postice subaciculatis, spatio scutellari quadrato, margineque laterali 

 loevibus, epipleuris bistriatis punctatis, tibiis antieis sub-6-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 epipleuraa 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. parillllpunctatus, rotundatus, nigro-seneus nitidus, parce pnnctulatus, thorace lateribns et 

 basi confertim punctato, antice haud impresso, elytris striis paulo pone medium abbreviatis, scquali- 

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

 rufis, tibiis anticis denticulatis. Long. ] 3. 



One specimen : Platte river. Kesembles S. conformis, and placidus, but differs, 

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



