neio Species of Ilistcridiii. 



?>2 1 



Oval, brassy ami sliiniii^; ; the head densely piiiictati', 

 stria obsolete ; the thorax broadly rusjose-pimctate laterally, 

 and narrowly at the b v^e, smooth behind the head and on th(! 

 disc, lateral edj^e with fiavoiH hair; the elytra, hunioral 

 anG;le smooth, stri;e 1-2 basal and very short, interstices 

 strigose, sutural stria complete with an arcuate basal extension, 

 the other strias are wanting, the flavous batid has a lob •- 

 shaped outline on the sutural disc and extends to the outer 

 margin, anteriorly it is obtusely pointed on the inner side of 

 the second stria (see fig. 9) ; the pygidinm is somewliat closely 

 but not densely punctate; the prosternum bistriate ; the 

 niesosternum evenly not closely punctured, with the marginal 

 stria interrupted in the middle ; the anterior tibiie liav3 

 12-13 small teeth. 



This species differs from E. finvopictus, Lew., in the thoracx 

 band of punctures not continuing behind the head ; in the 

 form of the flavous band it i.s most similar to I>isignatufs, Er. 



Hab. Chubut, Patagonia. ]\Iany exami)les. 



As the elytral markings are fairly constant in these species 

 I give outlines of thepatterns of E.zonalis (tig. 9), Jiavopi'ctus 

 (Hg. 10), Lew., decoratus(y\g. 11 ) and hisignatus (fig. 12), Er., 

 as an aid to their identification. 



Flo-. 9. 



Fm. 10. 



Fijr. II. 



Fi<r. U. 



(Jnaihonciis brevlstenuis, sp. n, 



Ovalis, corivexiusculus, nitidus ; fronte parum convpxa, paroo 

 punctulata ; elytris striis 1-4 dorsalibus flimidiatis, 4 basi 

 crenata ad suturam continuata ; prosterno striis brevibus aiitir(> 

 obtuse coiiuntibus. 



L. '21 m\\\. 



Oval, rather convex, black and shining; (he head, forehead 

 slightly convex, almost smooth, punctures being fine and 

 sparse; the thorax clearly punctured laterally, punctures 

 much finer on the disc, stria interrupted anteriorly, scutellar 

 fovea well-marked; tlie elytra, strije 1-4 dimidiate, inner 

 striie gradually shorter, 4 continues along the base to the 

 suture as a crenellate stria, sutural wanting ; the pygidia 

 finely and evenly not densely j)unctulate ; the prosteinum. 



