398 Mr. G. Lewis on 



Teretriosoma nigrescens^ sp. n. 



Subcyliiidricum. nigrum, nitidura, undique leviter punctatura ; pro- 

 sterno inciso ; niesosterno marginato ; antennis pedibusque piceo- 

 rufis. 



L. 2 miU. 



Cylindrical, black, shining ; head slightly convex between 

 the eyes, covered with small punctures not thickly set, clypeus 

 broad, slightly convex, and rounded off anteriorly ; thorax 

 sliglitly sinuous laterally, stria complete, punctures sparsely 

 set, rather fine on the sides and on the disk, but large in 

 front of the scutellum, without a scutellar impression ; elytra 

 evenly punctured throughout, with a posthumeral spot smooth, 

 one short oblique stria at base ; propygidium transverse, and 

 with the pygidium evenly punctulate, the pygidium convex ; 

 prosternum coarsely but not thickly punctate, distinctly incised 

 at the base ; raesosternum correspondingly acute anteriorly 

 and similarly punctate, with a well-marked marginal stria ; 

 the oblique lateral stria of the metasternum, as seen in T. virens 

 and others, is absent, and the median line also ; legs pitchy 

 red ; anterior tibiae 7-8-dentate, intermediate 5-spinose, poste- 

 rior 3-spinose ; antennas without pubescence. 



This species is rather larger than T. Grouvellei, and the 

 punctuation of the upper surface is much liner than in any 

 other species at present described. 



Hah. Guanajuato, Mexico. 



Teretriosoma Grouvellei, sp. n. 



Cylindricum, nigrum, nitidum, undique punctatiim ; mcsosterno 



obscure marginato ; pygidio convcxo. 

 L. vix 2 mill. 



Cylindrical, black, shining, wholly punctate ; antcnnte 

 without |)ubescence, scape angulate in the middle of the upper 

 edge ; forehead slightly convex, clypeus tiat ; thorax, stria 

 entire and well marked at the sides, but very tine behind the 

 head, rather closely punctured, without a scutellar fovea; 

 elytra also evenly and somewhat closely punctured througli- 

 oiit, not differing in the region of the scutellum ; propygidium 

 and pygidium more densely punctate, latter convex ; pro- 

 sternum coarsely punctate, the anterior lobe distinctly mar- 

 ginate, feebly impressed between the coxiv, and arched at 

 base ; niesosternum obtuse, anteriorly with marginal stria 

 complete but obscure, coarsely punctate, so also is the meta- 

 sternum ; nietasternal median line obsolete; tibiiv, intermediate 

 o-dentate, one small tooth near the base, two conspicuous in 



