NATURAL SCIENCES OP PHILADELPHIA. 313 



rounded, mandibles one-toothed. Thorax bistriate, the inner stria entire, the 

 outer posteriorly abbreviated before the middle. Elytra with the first four 

 dorsal striae entire, equal, the fifth a mere point or altogether wanting, the 

 sutural anteriorly abbreviated before the middle and posteriorly towards the 

 apex, subhumeral none ; epipleurae punctate, bistriate. Mesosternum punctate, 

 entire; pygidium coarsely punctate. Antic tibiae four-toothed, the anterior 

 tooth emarginate. Length 'IS. 



Hister a m b i g e n a . Subrotundus, subconvexus, niger nitidus punctulatus, 

 stria frontali antice plana ; pronoto striis duabus inequalibus, exteriore postice 

 valde abbreviata, interiore integra: elytris striis omnibus dorsalibus integris, 

 quinta et suturali antice connexis, subhumeralibus duabus antice abbreviatis ; 

 tibiis anticis tridentatis. 



Vermont. 



Roundish, subconvex, black, shining, punctulate ; frontal stria plane in front. 

 Mandibles toothless. Thorax bistriate, the interior stria entire, the exterior 

 posteriorly abbreviated before the middle. All the dorsal striae of the elytra 

 with the sutural entire, equal, this last connected anteriorly with the fifth at 

 the base, subhumeral two anteriorly abbreviated, the exterior one longer, 

 epipleurae punctate unistriate pygidium punctate, mesosternum not emarginate. 

 Antic tibiae tridentate ; anterior tooth emarginate. Length -175. 



Hister fu rtivu s . Subrotundus, niger, nitidus, impunctatus ; pronoto 

 bistriato, stria exteriore postice abbreviata ; elytris striis tribus exterioribus in- 

 tegris equalibus, quarta antice abbreviata, quinta basali, suturali utrinque 

 abbreviata, humerali distincta, subhuraerali vix ulla, epipleuris punctatis, tri- 

 striatis ; prosterno antice truncato, utrinque dente parvo armato ; tibiis anticis 

 tridentatis. 



Georgia. 



Roundish, black, shining, impunctate, frontal stria entire rounded. Thorax 

 bistriate, exterior stria posteriorly abbreviated below the middle. Elytra, first 

 three dorsal stria? entire, fourth anteriorly abbreviated in the middle, fifth basal, 

 a mere point, or entirely wanting, sutural anteriorly abbreviated, humeral 

 distinct, subhumeral scarcely any; epipleurae punctate, with three striae, the 

 third one rudimentary ; prosternum truncate at the apex with a small tooth on 

 each side, propygidium and pygidium punctate, the first with an impression on 

 each side. Antic tibiae three-toothed. Length *4. 



Very much resembles the H. depurator, but this last has the prosternum 

 rounded at the apex, bent down and margined, it likewise has the sutural stria 

 sometimes entire, but oftener abbreviated on both sides. 



Epierus mehicanus. Ellipticus, convexiusculus, niger nitidus, fronte 

 convexa, impunctata ; pronoto dense puncticulato, stria marginali integra ; 

 elytris impunctatis, striis omnibus integris punctatis, marginali integra leviter 

 impressa ; epipleuris punctatis, unistriatis. 



Mexico. 



Elliptic, rather convex, black, shining, head impunctate, front convex. Tho- 

 rax densely puncticulate, marginal stria lightly impressed, entire. Elytra 

 smooth, impunctate, all the striae entire, equal, punctate, the marginal or sub- 

 humeral entire, slightly impressed, epipleurae punctate, unistriate. Pygidium 

 densely puncticulate. Feet black. Length -125. 



Epierus ellipticus. Ellipticus, subdepressus, niger, nitidus, fronte con- 

 vexa puncticulata, pronoto dense puncticulato, stria marginali integra; elytris 

 impunctatis, striis omnibus integris punctatis, subhumerali sive marginali for- 

 titer impressa, epipleuris punctatis unistriatis. 



Southern States. 



Elliptic, rather depressed, black, shining, front convex, puncticulate. Thorax 

 densely puncticulate, marginal stria entire, tolerably strongly impressed. Ely- 

 tra impunctate, all the strias punctate, entire, the marginal or subhumeral, 



1859.] 



