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



margine apicali maculaque communi scutellari nigriS;, striis utrinque tribus externis integris, ' 

 reliquis obliteratis ; tibiis anticis bidentatis, jjosticis 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, and the posterior tibife are 

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

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



Sapeinus Leach. 



S. estriatus, oblongo-rotundatus, a^neo-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 laevibus, 

 stria externa elongata flexuosa parum distincta. Long. 'IS. 



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

 ternus, mancus, bigemmeus, &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 jiroster- 

 num compressed with the striae distinct. The anterior tibinB 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. obUquulus, oblongus, cylindricus, niger nitidus punctatus, elytris striola obliqua ad basin 

 versus humei'os impressis ; antennarum clava, pedibusque piceo-rufis, tibiis anticis subito 

 dilatatis, sexdenticulatis. Long. "13. 



Sacramento ; Mr. Wittick. This sjiecies resembles in form T. picipes, 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. 



Epueaea Er. 



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

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

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

 trimcatis. Long. -10. 



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



O. 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, elytiis testaceis, macula utrinque basali, 



