4O MEMOIRS ON THE COLEOPTERA 



behind the middle; apex nearly truncate, much narrower than the 

 base, which is transverse, becoming anteriorly oblique laterally, the 

 angles distinctly rounded; side margins more reflexed basally; surface 

 nearly as in the preceding, except that the strong median stria is 

 not at all impressed but sharply incised; elytra oval, with parallel 

 arcuate sides, three-fifths longer than wide, nearly one-half wider than 

 the prothorax; striae deep; intervals not quite flat, finely and very 

 closely punctate, the punctures very much smaller than those of 

 the striae; first three joints of the anterior tarsi (cf) dilated and very 

 gradually diminishing in width. Length (cf) 15.0 mm.; width 6.25 

 mm. Mississippi (Vicksburg) gravis n. sp. 



Body somewhat as in the preceding in general habitus but smaller and 

 much narrower in build, the anterior parts more brilliantly cupreous, 

 generally greenish toward the sides, the elytra less opaque and of a 

 clearer indigo-blue; head smaller but otherwise nearly similar, 

 smoother, the rugae of the preceding not visible; prothorax nearly 

 similar, except that the sides are more evenly, feebly arcuate from 

 near the base to the apex and the side margins are not or only very 

 slightly more reflexed basally; surface otherwise similar; elytra 

 nearly similar but much narrower, with finer and more deeply 

 impressed, still more strongly and closely punctate striae and more 

 convex intervals, having the similarly close-set punctures a little 

 stronger; under surface and tarsi nearly as in the two preceding. 

 Length (cf 1 9 ) 11.0-14.0 mm.; width 4.4-5.35 mm. Rhode Island 

 to Florida and westward to Tennessee and Indiana. Very common. 



emarginatus Say 



4 Labrum feebly emarginate; prothorax with basal and apical widths 

 almost equal. Body moderately small in size, the sides of the pro- 

 thorax very feebly sinuate posteriorly, the hind angles slightly 

 rounded; reflexed margin feebly elevated basally, the surface as 

 long as wide, nearly flat, densely punctate, with well marked median 

 line and deep elongate foveae; elytra oval, wider than the prothorax, 

 with strongly marked and distinctly punctate striae and flat, finely 

 and closely punctured intervals. Length 8-9.5 mm.; width 3.3- 

 4.0 mm. Description quoted from Dejean. Georgia, .amcenus Dej. 



Labrum deeply emarginate; prothorax generally more narrowed basally. .5 



5 Form moderately slender, not very convex, shining, metallic bluish- 

 green anteriorly, the elytra feebly shining and obscure deep blue; 

 under surface black, closely punctate throughout as in all the 

 preceding species, the legs testaceous; head more than two-thirds 

 as wide as the prothorax, smooth centrally, punctured sparsely 

 toward the eyes and across the occiput, the eyes only moderately 

 prominent; antennae slender, testaceous, clearer basally; prothorax 

 slightly shorter than wide, the sides evenly and moderately rounded 

 to basal sixth or seventh, there sinuate and thence straight and 

 parallel to the basal angles, which are right and sharply defined, the 

 reflexed margin very fine and even throughout; apex feebly sinuate, 

 a little wider than the base, which is transverse and rectilinear; 

 surface broadly, evenly convex, moderately coarsely, deeply, rather 

 sparsely and somewhat unevenly punctured throughout; median 



