Lasioglossum (Dialictus) weemsi (Mitchell, 1960)

Lasioglossum (Dialictus) weemsi (Mitchell, 1960) View in CoL

Figure 18 View Fig

Diagnosis. Males of L. weemsi can be distinguished from the similar species in the L. viridatum complex, and especially L. hitchensi , L. paradmirandum , L. admirandum , and L. subviridatum by the combination of mesoscutum entirely dull with tessellate microsculpture (partially shiny in L. subviridatum ), mesepisternum rugulose (smooth and imbricate to tessellate in L. paradmirandum ), metasomal terga moderately densely punctate (IS = 1–2 PD) (sparsely punctate (i = 2–4 PD) in L. hitchensi ) and without tomentum, clypeus apical margin brown (yellow in L. admirandum ), and tarsi orange.

Comments. The male of L. weemsi was unknown at the time of the revisions by Gibbs (2010, 2011). A single specimen was associated with some females via DNA barcodes. The DNA barcodes of L. hitchensi , L. leviense (Mitchell, 1960) , and L. weemsi are subtly but consistently distinct from other members of the L. viridatum complex, and these three species can almost always be separated from each other by diagnostic nucleotide substitutions ( Gibbs 2018b).

Revised keys to Lasioglossum (Dialictus) of Canada

The identification keys presented in Gibbs (2010) were extensively revised to incorporate new species, corrections, and improvements to reliability and ease of use. These keys are available in the online supplemental materials.