Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini) Author Gibbs, Jason text Zootaxa 2011 2011-10-28 3073 1 216 journal article 31531 10.5281/zenodo.1049595 1a985cc7-af57-45e9-a988-c3beda3c15b4 1175-5326 1049595 B5AF6DF4-D3A7-4942-A94F-CC051D8074CF The Lasioglossum ruidosense species-group Species included. Lasioglossum hemimelas , L . ruidosense , and L . versans . Diagnosis. Members of the L . ruidosense species-group are easily recognised by the following combination of characters in addition to the subgeneric characters of Dialictus . Head and mesosoma dull metallic, mesoscutal punctures widely separated between parapsidal lines, mesepisternum granular-imbricate, metasomal terga dark brown. Females : T1 anterior surface with evenly distributed erect hairs but no appressed hair fan, propodeum usually with lateral carina short not reaching dorsal margin. Males : Gonocoxite basally much wider than gonobase, gonostylus with medially directed elongate hairs, penis valve with strong dorsal crest. Distribution. Alaska, east to Nova Scotia , south to high elevations in northern Mexico .