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 ) novascotiae (Mitchell) Dialictus novascotiae Mitchell, 1960 : 407 . Ƥ. Holotype . Ƥ Canada , Nova Scotia , Baddeck, 27.viii.1926 , [ NCSU ]. Examined. Taxonomy. Knerer & Atwood, 1964 : Dialictus novascotiae 3, p. 5 (description); Krombein, 1967 : Lasioglossum ( Dialictus ) novascotiae , p. 464 (catalogue); Hurd, 1979 : Dialictus novascotiae , p. 1968 (catalogue); Moure & Hurd, 1987 : Dialictus novascotiae , p. 115 (catalogue); Gibbs, 2010b : Lasioglossum ( Dialictus ) novascotiae Ƥ3, p. 207 (redescription, key). Diagnosis. Female L . novascotiae can be recognised by the following diagnostic combination: head wide (length/ width ratio = 0.95–0.96), clypeus strongly protruding below suborbital tangent, mesoscutal punctures sparse throughout, mesepisternum rugulose, propodeum with dorsolateral slope rugulose ( Fig. 27 B), and metasomal terga blackish brown. They are most similar to L . lineatulum , which has head wider (length/width ratio = 0.92–0.93), propodeum with dorsolateral slope smooth ( Fig. 27 A), and metasomal terga with metallic reflections. Male L . novascotiae can be recognised by the following diagnostic combination: mesoscutal punctures sparse throughout, mesepisternum rugulose, and metasomal sterna with subappressed plumose hairs limited to apicolateral portions of S3 and lateral portions of S4–S5. They are similar to L . lineatulum , which has dense plumose hairs on S2–S4 and S5 laterally. Lasioglossum achilleae is similar but has a shorter head and sparse punctation on metasomal terga. Range. Nova Scotia west to Alaska, south to Michigan. USA : AK, ME, MI. CANADA : AB, BC, NB, NS, NT, ON, PE, SK. DNA Barcode. Available. Multiple sequences. Comments. Common in some localities.