new Species of Histeiidge. 271 



The straight crenulate stria at the suture of the raesosternum 

 is a marked character of this species and also that the pro- 

 sternal stria has an angular course anteriorly, not rounded off 

 as in P. lectus and tuberculatus. 



Bab. Rio Janeiro {Ft-}/). 



Eeninus turritus, sp. n. 



Breviter ovatus, convexus, piceus, nitidus ; fronte lateribus carinato- 

 striata, elypeo truncato marginato ; pronoto basi bicarinato ; ely tris 

 striis humerali et 1-4 integris, carinatis, siiturali tuberculiformi ; 

 mesosterno in medio transversim bistriato ; tibiis valde dilatatis. 



L. 31 mill. 



Shortly oval, convex, piceous, shining ; the head with a 

 cariniform lateral stria, the epistoma with a few fine irregular 

 transverse stria3, clypeus truncate with the edge distinctly 

 raised; the thorax smooth, marginal stria complete, anterior 

 angles a little oblique, on either side at the base opposite the 

 third elytral stria is a somewhat oblique fine carina which 

 does not quite reach to the middle of the disk; the elytra, striae, 

 inner humeral carinate and complete, 1-1 also complete but 

 less carinate, especially the fourth, 5 wanting, sutural tuber- 

 culiforra, tubercles seven and one basal close to the scutellum; 

 the propygidium is finely, transversely, and irregularly strigou^ 

 except at the apex ; the pygidium is almost without sculpture; 

 the prosternum, surface microscopically densely strigose, the an- 

 terior lobe is widely expanded and marginate, the keel has two 

 median stria3 which widen out widely at the base, where they 

 join the lateral striaj, anteriorly the median stria3 join before 

 the middle, the two lateral strife are broken or branched ante- 

 riorly ; the mesosternum is obtusely acuminate, the marginal 

 stria is fine and does not follow the contour of the acumination, 

 behind the marginal stria are two well-marked transverse strise, 

 the anterior one is widely bowed, the posterior one is nearly 

 straight, the suture is sutficiently traceable to show its position; 

 the metasternum has a straight lateral stria and tliree others 

 outcurved beside it, near t le centre there is a very minute 

 tubercle; the first segment of the abdomen has three fine 

 lateral striae and some irregular scratches or strite on each side 

 of its base. The surfaces of all the sterna are impunctate ; 

 the tibiae are all widely dilated and spinulose on their outer 

 edges. 



This species closely resembles R. meticulosa, Lew., in the 

 thoracic carina and the tuberculate sutural stria. E. Salvini, 

 Lew., has no sutural stria, and in seminitens, Sch., the sutural 

 stria is punctiform and dimidiate. R. meticulosa has the 



