36 U. S. P. R. R. EXP. AND SURVEYS ZOOLOGY 47TH PARALLEL. 



margine apicali maculaque communi scutellari nigris, striis utrinque tribus externis integris, 

 reliqiiis obliteratis ; tibiis anticis bidentatis, posticis seriebus transversis extrorsum spinulosis. 

 Long. *25. 



One specimen from San Francisco, given me by Mr. Wild. Smaller and narrower than 

 H. arcuatus, to which it is allied. The thighs are entirely black, arid the posterior tibire are 

 more compressed. The sutural stria is entirely wanting, and the epipleime are marked with a 

 single lateral stria ; the pygidium is equably and coarsely punctured. 



SAPRINUS Leach. 



S. estriatus, oblongo-rotundatus, eeneo-niger, thorace confertissime aciculato, callo utrinque 

 rotundato, spatioque basali sublaevibus, elytris confertissime aciculatis striis dorsalibus nullis, 

 macula pone basin subsuturali altera humerali tertiaque intermedia minore nitidis lasvibus, 

 stria externa elongata flexuosa parum distincta. Long. 13. 



One specimen from Oregon, collected by Dr. Townsend. This species belongs with S. fra- 

 ternus, mancus, bigemrneus, &c., to group 8 of my division of the genus, (Proc. Acad. Nat. 

 Sc. 6,) in whicli the front is transversely margined and angularly impressed, and the proster- 

 num compressed with the striae distinct. The anterior tibise were probably four-toothed, as in 

 S. bigemmeus, but the teeth, with the exception of one at the middle are entirely worn off. 



TERETRIUS Er. 



T. dbliquulus, oblongus, cylindricus, niger nitidus punctatus, elytris striola obliqua ad basin 

 versus humeros impressis ; anteiinarum clava, pedibusque piceo-rufis, tibiis anticis subito 

 dilatatis, sexdenticulatis. Long. *13. 



Sacramento ; Mr. Wittick. This species resembles in form T. piclpes, but is considerably 

 larger, being fully twice as long ; that species is more finely punctured, and has no oblique 

 stria at the base of the elytra. 



EPURAEA Er. 



E. nubila, elongato-ovalis, testacea, punctulato-rugosa, subtiliter flavo-pubescens, thorace 

 antrorsurn angustato, lateribus rotundatis depressis, angulis posticis subrectis, elytris anguste 

 marginatis, macula utrinque ad medium nigro-picea ornatis, ad apicem singulatim rotundato- 

 truncatis. Long. &quot;10. 



One specimen, San Jose, California. This species is a little wider than E. parallela Lee., 

 but is narrower than usual ; the thorax is about twice as wide as its length ; the base is 

 broadly rounded in the middle, and slightly sinuate towards the basal angles, so that the 

 latter become nearly rectangular, and not rounded. The elytra are about one-half longer 

 than wide. 



OMOSITA Er. 



0. inversa, nigra, opaca, subtiliter griseo-pubescens, confertim subtilius punctata, thorace 

 piceo-rufo, latitudine plus duplo breviore, antrorsum magis angustato, lateribus rotundatis late 

 depressis, disco canaliculato et utrinque subfoveato, elytris testaceis, macula utrinque basali, 



