Lasioglossum (Dialictus) gaudiale

Lasioglossum (Dialictus) gaudiale (Sandhouse, 1924) [Holotype: USNM; ♂ La Jolla, California, USA; August] Lasioglossum gaudiale is found in the xeric regions of southwestern USA, and northwestern Mexico. According to Gardner & Gibbs (2023), it has been collected in the Lower Colorado Desert, the Gulf Coast, and the Sarcocaulescent Shrubland. Here, we include the records of L. tegulariforme from Sandhouse & Cockerell (1924), since we consider they were records of L. gaudiale. At the time of Sandhouse & Cockerell’s work, L. gaudiale was only known from the male, and the females were likely misidentified as L. tegulariforme, which would later contribute to L. gaudiale and L. tegulariforme being incorrectly synonymized. It is possible that some old L. gaudiale records also refer to L. angelicum, L. magnitegula, or L. stictaspis, but specimens that have been examined so far have been L. gaudiale. Additionally, we reviewed three specimens collected in the Gulf Coast in September 2016 (1 ♂), and the Sarcocaulescent Shrubland in October 2018 (2 ♀; EMEC). See fig. 175.