398 Mr. G. Lewis 07i 



Teretriosoma nigrescenSj sp. n. 



Subcylindricum. nigrum, nitidum, imdiquo leviter punctatum ; pro- 

 stenio inciso ; mesosterno marginato ; aiitenuis pedibusque piceo- 

 riifis. 



L. 2 mill. 



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 

 slightly 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 ; mesosternum 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 tibise 7-8-dentate, intermediate 5-spinose, poste- 

 rior 3-spinose ; antennee without pubescence. 



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

 punctuation of the upper surface is much finer tiian in any 

 other species at present described. 



Hah„ Guanajuato, Mexico. 



Teretriosoma Grouvellei, sp. n. 



Cylindricum, nigrum, nitidum, undiquc punctatum ; mesosterno 



obscure marginato ; pygidio convexo. 

 L. vix 2 mill. 



Cylindrical*, black, shining, wholly punctate ; antennae 

 without pubescence, scape angulate in the middle of tlie upper 

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

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

 head, rather closely punctured, -without a scutellar fovea; 

 elytra also evenly and somewhat closely punctured through- 

 out, 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 coxa?, and arciied at 

 base ; mesosternum obtuse, anteriorly with marginal stria 

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

 sternum ; metasternal median line obsolete; tibia3, intermediate 

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



