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 Lasioglossum ( Dialictus ) paradmirandum (Knerer & Atwood) Dialictus paradmirandus Knerer and Atwood, 1966a : 886 . Ƥ 3. Holotype . Ƥ CANADA , Ontario, Iona, Elgin Co., 1.ix.1963 on Solidago , (G. Knerer) , [ ROM : 83856]. Examined. Taxonomy. Hurd, 1979 : Dialictus paradmirandus , p. 1969 (catalogue); Moure & Hurd, 1987 : Dialictus paradmirandus , p. 119 (catalogue); Gibbs, 2010b : Lasioglossum ( Dialictus ) paradmirandum Ƥ3, p. 237 (redescription, key). Diagnosis. Female L . paradmirandum can be recognised by the following diagnostic combination: mesoscutum tessellate, punctures moderately dense between parapsidal lines (i=1–2d); mesepisternum tessellate-imbricate, shallow punctures visible; T1 acarinarial fan with dorsal opening; T1 declivitous surface with distinct coriarious microsculpture; T3–T4 with moderately dense tomentum partially obscuring surface and distinct apical fringes. They are most similar to L . fattigi and L . admirandum . Female L . fattigi have a more robust head, moderately sparse punctures on lower paraocular area (i=1–1.5d), weakly imbricate mesoscutum, and T3–T4 have sparse tomentum not obscuring surface and sparse apical fringe hairs. Female L . admirandum have metasomal terga polished without evident microsculpture on declivitous surface of T1. Male L . paradmirandum are similar to females but may be further distinguished by head moderately elongate (length/width ratio = 1.03–1.04); flagellomeres long (length/width ratio = 1.69–1.83), pale brownish yellow ventrally; mesepisternum weakly reticulate dorsally, tessellate ventrally; metapostnotum rounded onto posterior propodeal surface, and apical impressed areas of metasomal terga impunctate. They are most similar to L . mitchelli and L . fattigi . Male L . mitchelli have metapostnotum sharply angled onto posterior propodeal surface, mesoscutum more densely punctate, and mesepisternum rugulose. Male L . fattigi have elongate heads (length/width ratio = 1.07) and mesepisternum imbricatetessellate dorsally. Range. Ontario south to North Carolina, west to Wisconsin, Iowa. USA : IA, IL , IN, MD, MI, MO, NC, NY, PA, WI, WV. CANADA : ON. DNA Barcode. Available. Multiple sequences. Comments. Uncommon. See Gibbs (2010).