Adult males of Bembidion transversale subgroup members A B. transversale (voucher V101454, Canada: Alberta: Burbank, junction of Red Deer and Blindman Rivers, 52.3542°N, 113.7556°W) B B. erosum (voucher V101453, USA: California: Del Norte Co., Wilson Creek, 3 m, 41.6051°N, 124.1005°W). C B. corgenoma (voucher V101452, from type locality) D B. perspicuum, light form (voucher V101461, USA: Arizona: Cochise Co., San Pedro R at Charleston, 31.6239°N, 110.1722°W) E B. perspicuum, dark form (neotype of Bembidium haplogonum Chaudoir, USA: California: Lake Co., North Branch Cache Creek at hwy 20, 305 m 38.9881°N, 122.5400°W) F B. sarpedon (voucher V101459, USA: Colorado: Las Animas Co., Cokedale, Reilly Canyon, 37.1346°N, 104.6114°W). Scale bar 1.0 mm.