Bembidion perspicuum LeConte, 1848

Ochthedromus perspicuus LeConte, 1848: 466 . Type locality “ Rocky Mountains ”. Holotype male, in MCZ (type number 5510), external structure and aedeagus examined.

Bembidion acomanum Casey, 1918: 59 . Type locality Jemez Springs, New Mexico, so restricted by Lindroth (1975). Lectotype female, designated by Lindroth (1975), in USNM (type number 36916), examined.

Bembidion excursum Casey, 1918: 59 . Type locality Tucson, Arizona. Holotype female, in USNM (type 36915), examined.

This species is known from Texas, Kansas, Colorado, New Mexico, Arizona, Utah, Nevada, California, and Oregon. Its range in México has not been examined. Specimens from northern California and Oregon are dark, with only elytral apices being pale. They are thus very similar in appearance to paler specimens of Bembidion lugubre, from which they are most readily distinguished by genitalic characters.