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Extracted from: Sandhouse G. A. New North American Species of Bees Belonging to the Genus Halictus (Chloralictus). No. 2532 - Proceedings U.S. National Museum. Vol. 65, Art. 19.
Lasioglossum Tegulariforme appears in this excerpt as the now synonymized Halictus Gaudialis.
Male.—About 4.5 mm. long; head and thorax brilliant blue; abdomen black; pubescence pure white. Face clothed with dense pubescence; facial quadrangle longer than broad; inner orbits converging
sharply below; antennae dark brown, flagellum yellow-testaceous
beneath, second and third antennal joints of equal length; front closely
punctured, the punctures becoming hardly more scattered below
antennae and on supraclypeal area; clypeus largely black, produced
about two-thirds its length below the eyes, coarsely punctured.
Thorax slender, with moderately dense pubescence; mesothorax shining, coarsely and closely punctured; scutellum and metathorax closely
punctured; disk of propodeum crescentic, shining, with a low inclosing rim posteriorly, plicae radiating slightly, reaching the apex;
mesopleurae coarsely punctured; sides of propodeum punctured; truncation distinct, but not sharply defined laterally; tegulae dark, opaque,
with close and deep punctures. Abdomen ovate, black, bases of seg- ments clothed with fine white hairs, delicately punctured; apical
margins of segments polished. Wings clear; anterior wing 3.5 mm.
long; stigma and nervures testaceous; second submarginal cell twice
as high as broad, receiving the first recurrent nervure very near the
apex; third submarginal broad at the base, contracted about one-half
above, almost twice as long as second on the marginal. Legs black, or very dark brown; tarsi paler brown; pubescence moderately dense.
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