78 PROCEEDINGS OP THE ACADEMY OP 



verse impression deep, dorsal line very fine. Elytra slightly wider than the 

 thorax, not quite twice as long as their width, convex ; near the suture, toward 

 the base, the surface is more convex, and this convexity is followed by a deep 

 impression near the suture, about the anterior fourth : the strias are punctured 

 but not impressed, they become obsolete at the latter fourth, and impressed at 

 their terminations, but the seventh and eighth are sinuate and impressed behind 

 to the very apex ; the tip of the third is not impressed : the marginal ceases at 

 the humerus : the first, fourth and fifth commence at the declivity of the base , 

 the others are a little shorter ; the intervals are entirely flat and the third is tri- 

 punctate. The legs are very dark rufous ; the anterior tibiae are armed exter- 

 nally with a small denticle, and an acute tooth ; the apical tooth is long and 

 curved, the inferior spur is one-third shorter, and slightly curved. 



lY. D. truncatus, nigro-aeneus, nitidus, clypeo truncato, vix emarginato, 

 fronte transversim hand profunde impressa, thorace latitudine subbreviore, 

 ovato antrorsum angustato, elytris striis impressis antice punctatis, 3ia hand 

 distincte bipunctata, 8va obsoleta, ad apicem exarata, interstitiis planis, palpis 

 pedibusque ferrugineis, antennis piceis ad basin ferrugineis, tibiis anticis vix 

 denticulatis. Long. •22. 



One specimen, Illinois, Mr. Wilcox. Of the same size as D. sphaericollis, but 

 more robust, and known at once by the ovate thorax and almost squarely trun- 

 cate clypeus. Blackish bronzed, shining : head with deep frontal impressions, 

 transverse line not profound : clypeus almost truncate with the angles rounded 

 not prominent; sides lobed as usual: antennae rufo-piceous, with the base red. 

 Palpi and mouth reddish. Thorax a little broader than long, ovate, narrowed 

 in front ; dorsal line and transverse anterior impression deep. Elytra not wider 

 than the thorax, less than twice as long as their width, convex : striae impressed 

 and entire, the first, fourth and fifth commence on the declivity of the base, 

 the others area little shorter, the eighth is obsolete and represented by only a 

 few punctures, but is deep at the tip : the punctures are moderately large and 

 extend a little beyond the middle ; the marginal stria ends at the humerus : the 

 interstices are flat, and in contact with the third stria may be seen two hardly 

 distinct dorsal punctures.- The body beneath is black ; the legs are dark red ; 

 the anterior tibiie have hardly a trace of external denticles, the terminal tooth 

 is long and gradually curved, the terminal spur is shorter and slightly curved. 



18. D. erythrocerus, elongatus, aeneo-niger, nitidus, clypeo fere trun- 

 cato, vix emarginato, angulis parum prominulis, fronte transversim impressa, 

 thorace latitudine longiere, subovato, elytris striis impressis, ad basin abbre- 

 viatis antice fortiter punctatis, 8va obsoleta ad apicem exarata, interstitiis fere 

 planis, antennis palpis pedibusque rufis, tibiis anticis vix denticulatis. Long. -20. 



Ohio. Dr. Schaum : Pennsylvania, Haldeman. DiflFers from the preceding by 

 the more slender form, deeper transverse frontal impression, and pale antennse. 



19. D. sellatus, piceo-rufus, nitidus, clypeo late emarginato, acute. biden- 

 dato, fronte transversim impresso, capite granulato rugoso, thorace convexo, 

 latitudine paulo breviore, ovato, elytris cylindricis convexis, pallidis, umbra 

 scutellari alteraque communi pone medium obscuratis, antennis pedibusque 

 testaceis. Long. -IS. 



Found at Atlantic City, on the coast of New Jersey ; allied to D. p a 1 1 i p e n- 

 ni s Putz. (^Clivina pallijjennis Say) but is much larger, and more robust, with 

 a more globose and slightly transverse thorax, and more strongly bidentate 

 clypeus. 



22. D. filiformis, feneo-niger, nitidus valde elongatus, clypeo late emarg- 

 inato bidentato, fronte transversim impressa, thorace latitudine baud breviore, 

 quadratim ovato, convexo, antrorsum subangustato, elytris cylindricis, striis 

 antice fortiter punctatis, postice fere integris, ad apicem breviter exaratis, ab- 

 domine postice, antennis pedibusque testaceis, tibiis anticis dente infcriore 

 elongato, superiore minuto. Long. -14. 



Coney Island, near New York, in salt marsh. Quite as slender as D. t e r - 



[March, 



