Extracted from Jason Gibbs. 2011. Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini.) Zootaxa.|
Lasioglossum (Dialictus) smilacinae (Robertson)
Halictus smilacinae Robertson, 1897: 322. ♀.
Lectotype. ♀ USA, Illinois, Macoupin Co., Carlinville, 21.iii.1894 (C. Robertson); [INHS: 16247] by W. E. LaBerge (in Webb
Halictus zophops Ellis, 1914: 97. ♀. [new synonymy]
Holotype. ♀ USA, Colorado, Boulder, 13.iv.1913, (M.D. Ellis); [UCMC]. Examined.
Dialictus philanthanusMitchell, 1960: 441. ♂. [new synonymy]
Holotype. ♂ USA, North Carolina, Mecklenburg Co., 3.vi.1957 (C.F. Smith); [NCSU]. Examined.
Taxonomy. Robertson, 1902b: Chloralictus smilacinae, p. 249 (key); Michener, 1951: Lasioglossum (Chloralictus)smilacinae, p. 1118; L. (C.) zophops, p. 1118 (catalogue); Mitchell, 1960: Dialictus laevissimus, p. (misdet., incorrect syn.) Krombein, 1967: Lasioglossum (Dialictus) philanthanum, p. 465 (catalogue); Hurd, 1979: Dialictus zophops, p. 1973(catalogue); Moure & Hurd, 1987: Dialictus philanthanus, p. 122, D. zophops, p. 142 (catalogue); Gibbs, 2010b: Lasioglossum (Dialictus) laevissimum, p. 170 (misdet.); L. (D.) zophops ♀♂, p. 368 (redescription, key).
Diagnosis. Female L. smilacinae can be recognised by the following diagnostic combination: size large (6.1–7.1 mm); head wide (length/width ratio = 0.92–0.94); mesoscutum imbricate-tessellate, punctures sparse punctures between parapsidal lines; mesepisternum rugulose; propodeal oblique carina well-developed; T1 acarinarial fan without dorsal opening; metasomal terga brown, apical impressed areas distinctly punctate; and T2 with sparse apical fringes visible in dorsal view. Similar species include L. gotham. L. laevissimum and L. versatum. Female L. gotham have more polished integument due to weaker microsculpture, obscure mesepisternal punctures, and T1 acarinarial fan with narrow dorsal opening. Female L. laevissimum have apical halves of metasomal terga impunctate and T2 lacks apical fringes visible in dorsal view. Female L. versatum have T1 acarinarial fan with wide dorsal opening.
Male L. smilacinae are similar to females and may be further distinguished by head longer (length/width ratio = 0.95–
0.99), mesepisternal punctures distinct, mesoscutum relatively polished, dorsolateral angle of pronotum obtuse, and apical
impressed margins of metasomal terga with widely scattered punctures. They are most similar to L. gotham, L. obscurum
and L. wheeleri. Male L. gotham have a narrow band of relatively dense punctation on base of apical impressed areas of
metasomal terga. Male L. obscurum have head longer (length/width ratio = 1.02–1.05) and apical impressed areas of metasomal
terga impunctate. Male L. wheeleri have dorsolateral angle of pronotum acute and apical impressed areas of metasomal
Range. Southern Ontario, south to Maryland and west to Colorado. USA: CO, CT, GA, IA, IL, KS, MA, MD, ME,
MI, MO, NC, NJ, NY, PA, SC, VA, WI, WV. CANADA: ON, PQ.
DNA Barcode. Available. Multiple sequences.
Lasioglossum smilacinae was previously considered a junior synonym of L. laevissimum. The lectotype was examined in 2007 and it was thought that the synonymy, first made by Mitchell (1960), was valid. Subsequently, L. zophops was reported to occur in eastern North America (Gibbs 2010b). The lectotype was re-examined in 2011 and it is now evident that the synonymy was incorrect and L. smilacinae is the valid name for the species previously reported as L. zophops. The
new synonymy with D. philanthanus was made possible by comparative study to male L. smilacinae and the related species
Extracted from: Robertson, C. (1897). North American Bees - Description and Synonyms. Transactions of the Academy of Science od St. Louis. Vol. 7. No. 14.
Form rather slender; head dark blue green; face densely
and finely punctured; clypells produced, with a purplish reflection,
sparsely and coarsely punctured; mandibles rufous at
tips; antennae short, the scape long; mesonotum dark green,
finely roughened, rather ~parsely pUllctured; metathorax long, strongly retracted, sharply truncate, the truncation subcordate;
disc with irregular raised lines reaching the apex;
wings hyaline, nervures, stigma, and tegulae exteriorly pale
testaceous; legs black or dull ferruginous, pubescence pale;
hind spurs with about three long teeth; abdomen black, with
slight metallic reflection, shini ng, segments one alld two
minutely punctured basally, a triangular patch on each bide
of base of second, and ·third and fourth segments clothed
with rather clo~e pale pubescence; margins of segments not
testaceous. Length 7 mm.
Illinois; two ~ specimens.