BEMBIDIIX.E 213 



right and sharply rounded, the edge nearly as in the preceding; 

 sutural stria moderate, the second very fine, the others obsolete; 

 foveae near basal and apical third as usual. Length 1.2 mm.; width 

 0.4 mm. Louisiana (Alexandria) rectus n. sp. 



Elytra not so long, feebly inflated posteriorly, wider behind the middle 

 than at base 5 



5 Form oblong, slightly convex, shining, piceous to testaceous, the pro- 

 thorax always paler and having the micro-reticulation perceptible 

 though feeble; head two-thirds as wide as the prothorax, the eyes 

 very small, slightly prominent, feebly setjgerous; antennae fuscous, 

 paler basally, short as usual; prothorax one-half or more wider than 

 long, the sides rounded, oblique and straight posteriorly, generally 

 very feebly sinuate at the obtuse but not rounded angles, rendered 

 slightly prominent by the well developed setigerous pore on the edge; 

 anterior impression distinct medially, the subbasal sulciform and 

 angulate; elytra scarcely one-half longer than wide, about two-fifths 

 to one-half wider than the prothorax, the sides broadly arcuate, 

 straighter basally; humeri slightly obtuse and moderately rounded; 

 sutural stria deep and distinct; beyond this one or two fine and feeble 

 stride can usually be detected; foveae behind basal and behind apical 

 third. Length 1.1-1.25 rnm.; width 0.35-0.4 mm. Rhode Island 

 to Missouri, North Carolina, Mississippi and Texas (Galveston). 

 Abundant. [Bemb. troglodytes Dej.] laevus Say 



Form as in ICEVHS but not so small in size, moderately convex, piceous- 

 black, with dark red prothorax, shining, the sculpture similar; under 

 surface black, paler anteriorly, the legs flavate, short and slender as 

 usual; head rather large, more than three-fourths as wide as the pro- 

 thorax, the eyes very small but prominent; antennae a little longer 

 though similarly moniliform, nearly three-fourths as long as the 

 elytra; prothorax one-half wider than long, the anteriorly rounded 

 sides becoming oblique and straight in nearly basal half, with a very 

 small sinus adjoining the very obtuse and prominently rounded 

 angles, the anterior impression subobsolete, the posterior as usual; 

 elytra as in Icevus but rather longer, fully one-half longer than wide, 

 at base slightly, behind the middle fully, two-fifths wider than the 

 prothorax; sutural stria coarse and deep; beyond this there are two 

 or three other fine and feeble striae; foveae at basal and apical third. 

 Length 1.31.35 mm.; width 0.450.5 mm. Mississippi (Vicksburg). 

 Four specimens flumenalis n. sp. 



Form and size as in the preceding but more depressed and paler in color, 

 pale brown, the prothorax rufous; under surface nearly black pos- 

 teriorly, the legs obscure flavate; sculpture similar; head similarly 

 well developed, the eyes small and prominent; antennae two-thirds 

 as long as the elytra ; prothorax as in. flumenalis in outline, impressions 

 and form of the hind angles; elytra nearly similar but narrower, and 

 except that the second stria is almost as distinct as the first, the third 

 also evident, the minute erect hairs on the edge near the humeri 

 and the very feeble serration as in all the preceding species; posterior 

 part of the lateral groove very irregular, the basal part obsolete and 

 represented by three setigerous fovese as usual in the subgenus. 



