102 DESCRIPTIONS OP NEW SPECIES. 



Russian America, the sides of the thorax are also very strongly 

 and unequally toothed, but the elytra are not opaque, and the 

 granules are not so dense nor so acute, being less distinct than 

 the corresponding punctures. 



355. D. cribratlis. Elongatus cylindricus niger, dorso glaber, ad 

 marginem parce pilosus, thorace latitudine haud breviore, lateribus 

 cum apice rotundatis, subserratis, angulis postiois rotundatis, disco con- 

 vexo confertim granulate, granulis versus apicem acutis reclinatis ; 

 elytris nitidis, fortiter baud seriatim punctatis, postice sequaliter con- 

 vexis. Long. -14 *19. 



Middle States ; not rare. Quite distinct by the feebly serrate 

 thorax, and the shining coarsely punctured elytra. 



356. D. dciisiis. Elongatus, cylindricus, niger subopacus, setis fulvis 

 erectis vestitus, thorace latitudiiie haud breviore, lateribus antice cum 

 apice rotundatis et fortiter dentatis, postice subparallelis subserratis, 

 angulis posticis rotuudatis, disco convexo dense granulato, granulis 

 anticis acutis ; elytris coufertim fortiter punctatis, subgranulatis, postice 

 sequaliter convexis. Long. '12. 



Two specimens ; New York. Differs from D. substriafus by 

 the thorax being more densely granulate and by the elytra not 

 being substriate, and from D. porcatus by the elytra not being so 

 rough, and from both by the sides of the thorax from the middle 

 being only feebly serrate. 



POL.YCAON LAP. 



357. P. plibescens. Elongatus, nigro-piceus, pube laxa helva ves- 

 titus pilis longioribus intermixes, capite thoraceque confertim granu- 

 latis, hoc ovato latitudine vix longiore, postice angustato, apice obsolete, 

 basi sat distincte transversim impresso, elytris sat dense punctatis. 

 Long. -40. 



Cape San Lucas, Lower California ; Mr. Xantus. The punc- 

 tures of the elytra are not coarse, nor very closely placed, but 

 simply moderate in ttoth respects : the front is uniformly convex, 

 and not impressed. 



358. P. punctatus. Elongatus, nigro-piceus nitidus, pube brevi laxa 

 vestitus pilis longioribus intermixtis, capite granulato, tliorace ovato 

 latitudine vix longiore, postice angustato, subcanaliculato vix trans- 

 versim impresso, disco punctato, versus latera subgranulato, elytris sat 

 dense punctatis. Long. -48. 



