New synonymies and notes on North American Loxandrus LeConte (Coleoptera: Carabidae)

The following new synonymies within the genus Loxandrus are proposed: L. parvicollis Casey, 1918 and L. concinnus Casey, 1918 with L. celeris (Dejean, 1828); L. crenulatus Chaudoir, 1868 with L. crenatus LeConte, 1852; L. calathinus LeConte, 1878 and L. cursitans Casey, 1918 with L. agilis (Dejean, 1828); L. suturalis Casey, 1918 with L. cervicalis Casey, 1918; L. comptus Casey, 1918, L. contumax Casey, 1918 and L. breviusculus Casey, 1924 with L. floridanus LeConte, 1878; L. aduncus Allen, 1972 with L. parvulus Chaudoir, 1868; L. minutus Allen, 1972 with L. pusillus LeConte, 1852; L. vitiosus Allen, 1972 with L. vulneratus Casey, 1918; L. fulgens Casey, 1918 with L. brevicollis (LeConte, 1848); L. ludovicianus Casey, 1918 with L. collucens Casey, 1918; L. limatus Casey, 1918 with L. rectus (Say, 1823); L. reflexus LeConte, 1878 and L. lateralis Casey, 1918 with L. saphyrinus (Chaudoir, 1843). Syntypes of Loxandrus accelerans Casey, 1918, L. collucens Casey, 1918, L. piceolus Chaudoir, 1868, L. piciventris (LeConte, 1848), and L. proximus Chaudoir, 1868 could not be associated with any species treated by Allen (1972) and are likely valid species. Species groups for North American Loxandrus are briefly characterized. Species belonging to each group are listed and their distributions noted.