BEMBIDIIISLE 13 



more than half as long as the body, the third joint three-fourths longer 

 than the second and longer than any of the following, colored as in cox- 

 endix; head very large, fully four-fifths as wide as the prothorax, the latter 

 nearly one-half wider than long; base and apex equally wide, the surface 

 nearly as in coxendix, but with very feebly arcuate sides, the posterior 

 sinuation broad, moderate, the angles more than right, although very 

 sharply pointed as usual; elytra oblong-oval, convex, one-half longer 

 than wide, two-fifths wider than the prothorax, rounding behind in fully 

 apical third; striae coarse and coarsely, closely punctate, the eighth less 

 strongly than the seventh; punctures somewhat transverse, especially 

 in the sublateral striae; intervals convex, the third with the dorsal foveae 

 close to the third stria, at the middle and at apical fourth. Length (cf ) 

 4.7 mm.; width 1.7 mm. Kansas. Prof. Snow. 



One of the smallest, narrowest and more convex species of the 

 subgenus, with strong elytral sculpture and more convex intervals. 



Bembidion vigilans n. sp. Smaller than coxendix and relatively nar- 

 rower, bright bronze above, metallic green beneath, the legs and anten- 

 nae as in that species; head (cf 1 ) five-sixths as wide as the prothorax, the 

 latter equally wide at base and apex, fully one-half wider than long, 

 throughout nearly as in coxendix, except that the reflexed lateral margin 

 almost disappears apically; elytra three-fifths longer than wide, two- 

 fifths wider than the prothorax, parallel, the sides gradually rounding 

 basally and at apex; striae rather coarse but not much impressed, coarsely, 

 not very closely punctate, the punctures of the eighth subsimilar to those 

 of the seventh; intervals somewhat convex, the dorsal foveae as in cox- 

 endix. Length (cf 1 9 ) 4.5-5.4 mm.; width 1.6-2.0 mm. Two exam- 

 ples, unlabeled in the Levette collection and probably from Indiana. 



This species, while allied to coxendix, can be distinguished readily 

 by the smaller average size, narrower form, parallel and not basally 

 subinflated elytra, slightly shorter prothorax and in having the 

 punctures of the eighth stria nearly similar to those of the seventh. 

 In coxendix the punctures of the eighth stria are very much feebler. 



Group II bifossulatum 

 Subgenus Ochthedromus Lee. 



The closest approach to this group in the European fauna is that 

 represented by bipunctatum Linn., named Testedium by Motschul- 

 sky, and there the impressed dorsal punctures are as large and con- 

 spicuous as in bifossulatum. The European forms are, however, 

 very much smaller than the American, and differ greatly in the 

 nature of the eighth elytral stria and in the rounded humeri. The 

 eighth stria in bipunctatum is deep, impunctate and near the sides. 



