12 MEMOIRS ON THE COLEOPTERA 



Bembidion unicum n. sp. Oblong-oval, moderately convex, narrower 

 than coxendix, shining though just visibly alutaceous thoughout the en- 

 tire upper surface, bright bronze, black with green lustre beneath; femora 

 testaceous basally; antennae long, slender, blackish, the basal joint tes- 

 taceous, the next three more or less broadly testaceous basally; head 

 large, fully four-fifths as wide as the prothorax, the latter two-fifths 

 wider than long, with equal base and apex, the sides broadly rounded, 

 converging and sinuate toward the rather prominent basal angles, trans- 

 verse subbasal impression strong, the fovese deep, simple, oblique, the 

 carina fine but distinct; median stria rather fine; side margins distinctly 

 reflexed throughout; elytra one-half longer than wide, two-fifths wider 

 than the prothorax, the dorsal foveae attached to the third stria, the first 

 at the middle, the second at apical fourth; intervals nearly flat; punctures 

 of the eighth stria very fine and feeble. Length (9) 4.8 mm.; width 

 1.8 mm. Texas (Laredo). 



It is interesting to note species of the coxendix series having no 

 trace of the medio-lateral thoracic seta, and this is confirmatory of 

 their affinities as expressed above; the puncture is as thoroughly 

 obsolete as in any of the litorale series. 



Bembidion venator n. sp. Oblong, very moderately convex, shining, 

 black, the upper surface bright aeneous, the head and pronotum sometimes 

 greenish or bluish, metallic greenish beneath; femora pale at tip and 

 broadly toward base, the dark part with metallic lustre; antennae slen- 

 der, colored as in unicum but rather shorter than usual; head large, three- 

 fourths as wide as the prothorax, with the usual very large eyes of the 

 group; prothorax fully three-fifths wider than long; base and apex 

 equally wide, the surface and general outline much as in coxendix, but 

 with deeper subbasal sinuation at the sides, the basal angles very acute, 

 everted and prominent; elytra slightly more elongate than in coxendix, 

 oblong, not very obtusely rounded at apex, more than one-half longer 

 than wide and about two-fifths wider than the prothorax, striate and 

 punctate as in coxendix but more coarsely. Length (cf 9 ) 5.7-6.2 mm.; 

 width 2.0-2.3 rnm. Texas (El Paso), Dunn. 



This species is allied rather closely to coxendix, but may be dis- 

 tinguished by its broader, more transverse prothorax, with more 

 prominent and acute basal angles, relatively more elongate and 

 more coarsely sculptured elytra and several other less marked char- 

 acters. The single male at hand has the elytral intervals somewhat 

 sloping inwardly from outer to inner stria, a feature not observable 

 in any one of the four females. The tarsal characters are of the 

 usual type. 



Bembidion snowi n. sp. Elongate-oval, rather narrow and convex, 

 shining, obscure bronze above, greenish-metallic beneath, the legs some- 

 what as in the preceding but more nearly testaceous, the antennae long, 



