NATURAL SCIENCES OP PHILADELPHIA. 79 



m i n a t u 3 Zee. shining brassy black. Head with clypeus broadly emarginate, 

 and acutely bidentate, front with a deep transverse line : antennae testaceous, 

 mouth reddish. Thorax not wider than long, subquadrate ovate, sides not con- 

 verging much in front, convex, anterior transverse impression feeble, dorsal line 

 entire, fine. Elytra not Avider than the thorax, twice as long as their width, 

 cylindrical: striae commencing behind the anterior declivity of the base, strong- 

 ly but distantly punctured nearly to the middle, the inner ones are then deep 

 and impunctured nearly to the tip, where they are less deep, but at the extreme 

 tip are again deeply impressed as in many other species : the interstices are 

 convex, the third not punctured : the outer strife are less deep, and the eighth 

 is almost eflfaced : the marginal ceases at the humerus. The abdomen is rufo- 

 testaceous, paler towards the tip : the legs are testaceous, the anterior tibiae are 

 armed externally with two teeth, the upper very small, the lower acute and 

 prominent: th*e terminal tooth is long and slightly curved, the inferior spur is 

 not longer than the tooth, but is more curved. 



24. D. d e n t i g e r, elongatus, nigro-ceneus nitidus, clypeo late emarginato 

 angulis prominulis, fronte transversim paulo impresso, thorace latitudine vix 

 breviore, antrorsum angustato, subgloboso, elytris striis punctatis, postice 

 parum obliteratis, inte"uis antice abbreviatis ; stria basali transversa nulla, 

 apicali unica brevi exarata ; antennis pedibusque rufo-testaceis, tibiis anticis 

 dente externo longo armatis. Long. •14. 



New York and Pennsylvania. More stout than D. terminatus andfili- 

 f or mis, but more elongate than usual. Blackish brassy, shining: head smooth 

 with deep frontal impressions connected between the antennae by a deep trans- 

 verse line : clypeus broadly emarginate, with the angles prominent, but not very 

 acute. Antennae reddish testaceous. Thorax slightly broader than long, nar- 

 rowed in front, subtrapezoidal, very much rounded behind, and convex, dorsal 

 line and anterior transverse impression well marked. Elytra hardly wider than 

 the thorax, about twice as long as the width, cylindrical, convex: striae seven 

 upon each, which are tolerably deep towards the base, but very fine and almost 

 obliterated at the apex : the punctures are large and extend to about the middle : 

 the marginal stria ceases at the shoulder, and the four interior strise do not 

 reach the declivity of the base. The under surface is black, and the legs are 

 ferruginous : the anterior tibiis are armed externally with a strong tooth near the 

 apex, the upper denticle is obsolete, the apical tooth is long and curved : the 

 interior apical spur is still longer and more curved. 



26. D. r ufi ven tris, nigro-aeneus, aitidus, clypeo truncato, fronte trans- 

 versim baud impressa, thorace latitudine baud breviore, ovali, antrorsum paulo 

 angustatoj elytris striis antice fortiter punctatis postice exaratis, ore abdom- 

 ineque rufis antennis fuscis ad basin pedibusque testaceis, tibiis anticis dente 

 inferiore acuto armatis. Long. -ll. 



One specimen from Louisiana given me by Dr. Schaum. In the proportions 

 of the body, and sculpture of the elytra this species resembles D. haemor- 

 r h o i d a 1 i s, but the other characters are very different. The upper denticle 

 of the anterior tibias is very small, the lower one is acute and prominent, the 

 terminal tooth is long and curved, but the inferior spur is yet longer and more 

 curved. The strife of the elytra do not extend upon the anterior declivity ; they 

 are very strongly punctured to the middle, and then become gradually obliter- 

 ated to the tip, when the first, second and seventh are slightly impressed : the 

 eighth stria is obliterated and the marginal ceases at the humerus : the inter- 

 stices are convex, and the third are without punctures. 



27. D. setosu s, feneo-niger, nitidus, clypeo emarginato, bidentato, fronte 

 transversim impressa, thorace latitudine breviore, ovato, trapezoideo, elytris 

 convexis, grosse seriatim punctatis, postice laevigatis, interstitiis alternis punctis 

 minutis setiferis uniseriatis notatis, antennis pedibusque testaceis, tibiis anticis 

 dente inferiore acuto, superiore vix distincto. Long. -12. 



Massachusetts and New York, in salt marsh. A very curious species, more 

 robust than usual and having nearly the proportions of D. globulosus. 



1857.] 



