Lasioglossum (Hemihalictus) macoupinense (Robertson, 1895)

Lasioglossum (Hemihalictus) macoupinense (Robertson, 1895) View in CoL

Macoupin Sweat Bee

= Halictus 4-maculatus Robertson, 1890: 117 (replaced by Halictus macoupinensis Robertson, 1895 , due to primary homonymy with Halictus quadricinctus Schenck, 1853 ] Connecticut lectotype of Halictus 4-maculatus designated by Cresson, 1928). Synonymy by Gibbs et al. (2013).

Lectotype. Female USA: Connecticut: New Haven Co.: Waterbury , 9 July 1879, W. H. Patton ( ANSP).

Notes: Lasioglossum macoupinense sensu Gibbs et al. (2013) [= Evylaeus divergens (Lovell) sensu Mitchell, 1960 ], has a longer head than the otherwise similar L. birkmanni [= Evylaeus macoupinensis (Robertson) sensu Mitchell, 1960 ] and a generally more northern but broadly overlapping distribution. Gibbs et al. (2013) found that the type series Halictus 4-maculatus Robertson, 1890, was composite, comprising example of both of the abovementioned taxa, and that Cresson (1928) had designated a long-headed bee from Connecticut as the lectotype of H. 4-maculatus (evidently overlooking Robertson’s replacement name Halictus macoupinense ). Choice of Connecticut not Illinois as the lectotype locality contradicted the original description of H. 4-maculatus as a broad-headed bee with the clypeus “hardly produced” and also contradicted the etymology of the replacement name, referencing Macoupin County, Illinois [only short-headed L. birkmanni was reported by Gibbs et al. (2013) from Illinois, and Macoupin County appears to be south of the predicted range of the long-headed taxon]. Here we follow Gibbs et al. (2013) and subsequent authors in using the name L. macoupinense for the long-headed bee best known historically as Evylaeus divergens .