Replacement names for one primary homonym and four secondary homonyms within Lasioglossum (Chilalictus) are proposed. The primary homonym change is: L. clariventre (Friese, 1924) = L. impunctatum nom. nov. The secondary homonym changes are: L. bidens Walker, 1995 = L. bidentatulum nom. nov., L. megacephalum Walker, 1995 = L. platychilum nom. nov., L. occidens Walker, 1995 = L. occiduum nom. nov., L. soror Walker, 1995 = L. sororculum nom. nov., and L. striatum Walker, 1995 = L. seriatum nom. nov.