new Species of Histeridse, 247 



pygidium is similarly punctured, margined externally with a 

 smooth somewhat elevated rim ; the prosternum is bistriate, 

 striae evanescent anteriorly before the suture, the anterior lobe 

 is margined with a deep stria which, being oblique laterally, 

 leaves a wide margin, the surface of the lobe and the keel is 

 sparsely punctulate and microscopically strigose ; the meso- 

 sternum is feebly sinuous and margined with a well-marked 

 stria j the metasternum has a lateral stria only ; the anterior 

 tibige are 3-dentate, but the apical tooth is bifid. 



The smooth margin of the propygidium in this species 

 agrees somewhat with that of II. latimargo, Sch. The 

 species belongs, like //. (jihherosus, to an American section of 

 the genus with a striate prosternum. 



Ilah. Costa Eica. '^ Barba Esmeralda, May 1890" 

 (P. Biolley). 



Hister planimargo, sp. n. 



Ovalis, convexus, niger, nitidus ; fronte punctulata, stria antice 

 recta ; thorace stria marginali iiiterrupta, interna iutegra ; 

 elj'tra striis 1-4 iutegris, 5 brevi, suturali dimidiata ; propj-gidio 

 postico transversim punctate, margiiie laterali aiiticoque Ifevi ; 

 pygidio punetato, margine extus lawi ; prosterno bistriato, striis 

 posticis conjunctis. 



L. 4^ mill. 



Oval, convex, black and shining; the head, surface punctu- 

 late, frontal stria nearly straight anteriorly ; the thorax, 

 marginal stria interrupted behind the neck, lateral stria com- 

 plete, parallel to the sides and somewhat strong laterally; 

 the elytra with a fine oblique humeral stria only, dorsal strite 

 1-4 complete and rather deep, 5 apical, short and punctiform, 

 sutural apical and dimidiate, turning away from the suture 

 posteriorly ; the propygidium is transversely densely punc- 

 tate, with the base and sides rather broadly smooth ; the 

 pygidium also densely punctate, with an outside smooth 

 margin ; the prosternum, anterior lobe niarginate, keel bi- 

 striate, striae joining behind, surface of lobe microscopically 

 strigose; the mesosternum feebly sinuous in front, marginal 

 stria complete; the anterior tibia with an apical bifid tooth 

 and two simple teeth behind it. 



In the American series this species may be placed next to 

 the last and near //. Jatimargo, Sch. 



Hah. Costa Eica [IJonchier). 



Hister cinctipygus, sp. n. 



Breviter ovatus, convexus, niger, nitidus ; fronte antice depressa, 

 stria Integra ; thorace antice bisinuato, stria marginali ad oculos 



