The genus Alaolacon Candèze, a senior synonym of the genus Eumoeus Candèze (Coleoptera, Elateridae, Agrypninae)

Alaolacon Candèze, 1865 is found to be a senior synonym of Eumoeus Candèze, 1874, Luzonicus Fleutiaux, 1916 and Tharopsides Fleutiaux, 1918. Alaolacon is represented by Alaolacon bakeri (Fleutiaux, 1916), comb. n., Alaolacon candezei Fleutiaux, 1928, Alaolacon cyanipennis Candèze, 1865, Alaolacon fujiokaisp. n., Alaolacon griseus Candèze, 1874, Alaolacon megalopussp. n., Alaolacon murrayi (Candèze, 1874), comb. n., and Alaolacon philippinensisnom. n. This genus is redescribed based on the descriptions of three species, Alaolacon candezei, Alaolacon fujiokai, and Alaolacon megalopus as well as the examination of the holotypes of Alaolacon cyanipennis and Alaolacon murrayi comb. n. Males of the genus Alaolacon exhibit 12-segmented and biflabellate antennae, and the females exhibit 11-segmented and subpectinate antennae. A key to species is provided.