or PHYTOPHAGOUS COLEOPTEEA. 349 



oblique and very slightly bisinuate on either side, median lobe 

 subacute ; upper surface distinctly punctured, interspaces (when 

 viewed under a lens) very minutely punctured ; at the base on 

 either side the median lobe is a distinct depression. Scutellum 

 narrowly trigonate, shining black. Elytra distinctly punctate- 

 striate, interspaces remotely impressed with very minute punc- 

 tures, only visible under a lens. Presternum broadly oblong- 

 quadrate, its surface plane, coarsely rugose-punctate. 



Lamprosoma TRiDENTATUM, n. sp. Ovatum, postice attenuatum, 

 valde convexum, nitidum, subtus cum antennis nigrum, supra aureo- 

 seneum ; capite granuloso, tenuiter subremote punctato ; clypeo de- 

 clivi, antiee concavo-emarginato ; labro tridentato ; thorace remote 

 tenuiter punctato ; elyti'is sat fortiter punctato -striatis ; prosterno 

 plus duplo longiore quam latiore, piano, fortiter punctato, antiee 

 concavo. Long. 3 lin., lat. 2j lin. 



Sab. Brazil. 



Head granulose, finely but not closely punctured; clypeus 

 almost entirely separated from the face by a sutural line, its an- 

 terior surface gradually deflexed, more coarsely punctured than 

 the upper face, its anterior margin concave-emarginate ; labrum 

 black, its anterior margin tridentate. Thorax more than twice 

 as broad as long at the base ; sides quickly converging and slightly 

 rounded from base to apex ; basal margin very oblique on either 

 side, broadly but slightly concave near the outer angle, apex of 

 median lobe subacute ; upper surface distantly and finely punctured, 

 impressed near the middle of the basal margin with a few large 

 punctures ; at the middle of the base, just before the basal lobe, is 

 a faint, ill-defined transverse impression. Scutellum narrowly 

 wedge-shaped, black. Elytra rather strongly punctate-striate ; 

 interspaces plane, impressed here and there with faint irregular 

 strigse. 



Lamprosoma canaliculatum, n. sp. Breviter ovatum, gibboso- 

 convexum, late metallico-purpureum, nitidum, pectore oreque nigris ; 

 capite evidenter punctato ; clypeo depresso, antiee profunde concavo- 

 emarginato, sinus lateribus in dentem robustum obtusum, intus leviter 

 curvatum, producto ; thorace evidenter subremote punctato, nitidO;, 

 utrinque ante lobum basalem vix excavato ; elytris distincte punctato- 

 striatis, interspatiis (sub lente) tenuissime punctatis ; prosterno plus 

 triplo longiore quam latiore, antiee canaliculate. Long. 3 lin., lat. 

 ».2i lin. 

 - SLab. Upper A-mazons, Pebas. 



Head finely but distantly punctured ; clypeus and a narrow tri- 



