312 PROCEEDINGS OP THE ACADEMY OP 



Striae entire, equal, the fifth abbreviated anteriorly much behind the middle, the 

 sutural before the middle; epipleuree and mesosternum impunctate, the former 

 bistriate, pygidium densely punctate. Feet rufous, antic tibiae with six small 

 teeth. Length *1. 



Resembles the Ph. ve r n u s ; but differs in the less concave frout, in the 

 longer sutural stria, and in the punctate pygidium ; the Ph. v e r n u s has this 

 part very finely puncticulate, it is likewise a little larger. 



Hister h os p i t u s . Subrotundus, convexus, niger, nitidus, stria frontali 

 subsinuata; prouoto unistriato ; elytris striis tribus dorsalibus primis integris, 

 quarta et quinta obsoletis, suturali ante medium antice abbreviata, subhumerali 

 nulla ; propygidio utrinque ad latera impresso ; tibiis anticis tridentatis. 



Western States. 



Roundish convex, black, shining, impunctate, frontal stria subsinuate, mandi- 

 bles toothless. Thorax with one entire stria, the descending portion of which 

 forms a right angle with the part in front. Elytra with the first three dorsal 

 striae entire, equal, the fourth and fifth obsolete or only marked by an apical 

 and basal point, sutural anteriorly abbreviated before the middle, subhumeral 

 none ; epipleurae punctate bistriate. Propygidium with an impression on each 

 side and with the pygidium densely punctate, mesosternum very slightly emar- 

 ginate. Antic tibiae tridentate, the anterior tooth large. Length -2. 



Hister regularis. Ovalis, parum convexus, niger, nitidissimus, impunc- 

 tatus, fronte stria subplana ; pronoto striis duabus externa abbreviata, interna 

 integra ; elytris striis tribus dorsalibus primis integris, quarta et quinta medio 

 antice abbreviatis, suturali ante medium antice abbreviata, subhumerali medio 

 antice abbreviata, pygidio puoctato ; tibiis anticis tridentatis. 

 Africa. 

 . Oval, a little convex, black, very shining, impunctate, frontal stria nearly 

 plain, a little incurved in the middle, mandibles strong, two-toothed, deeply 

 longitudinally excavated. Thorax bistriate, the external stria much abbreviated 

 posteriorly before the middle, the interior entire, sinuate in the middle, the 

 marginal very lightly marked. Elytra a -little narrowed behind, with impunc- 

 tured striae, the first three equal, entire, fourth and fifth abbreviated anteriorly 

 in the middle, the sutural a little before the middle, subhumeral impunctate ; 

 pygidium punctate. Antic tibia? tridentate. Length -35. 



Hister granadensis. Suboblongiis, convexus, niger, nitidus, stria 

 frontali sinuata ; pronoto bistriato, striis subequalibus, subintegris ; elytris striis 

 quatuor dorsalibus primis integris, quinta, suturali et subhumerali antice ab- 

 breviatis ; propygidio utrinque impressione profunda laterali et cum pygidio 

 punctato ; tibiis anticis quadridentatis. 



Panama. 



Rather oblong, convex, black, shining. Head punctate, slightly impressed, 

 stria sinuate. Thorax very finely puncticulate, bistriate, striaj subequal, sub- 

 entire the outer one a little more abbreviated than the inner. Elytra smooth, 

 the first four dorsal striae equal, entire, fifth very much abbreviated behind the 

 middle, sutural abbreviated before, subhumeral in the middle ; epipleura? bi- 

 striate ; propygidium with a deep lateral impression on each side, and with the 

 pygidium thickly punctured. Antic tibiae four-toothed, the anterior tooth 

 bifid, the posterior minute. Length -26. 



Resembles H. coenosus. 



Hister defectu s. Rotundus niger, nitidus, stria frontali rotundata ; pro- 

 noto bistriato, stria interiore integra exteriore ante medium postice abbreviata: 

 elytris striis quatuor dorsalibus primis integris, quinta nulla vel punctum 

 merum, suturali abbreviata, subhumerali nulla : tibiis anticis quadridentatis. 



New York to Georgia. 



Roundish, black, shiniag, impunctate except on the head, frontal stria 



[Nov. 



