Identification Summary: Small to moderately sized; very sparsely pitted on scutum and on supraclypeus; fan hairs restricted to patches on the far sides of the base of T1; has distinct carinae forming angles or horseshoes on either side of the propodeal triangle; lateral carinae reach all the way to the triangle; similar to L. achilleae but with dull integument due to microsculpturing (mostly microscopic tiny incised lines).
Reprinted with permission from: Mitchell, T.B. 1960 Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 141.
FEMALE—Length 4 mm.; head and thorax green, abdomen blackish; pubescence short, thin, entirely white; head somewhat broader than long; clypeus convex, projecting about one-third below suborbital line; supraclypeal area considerably broader than long, much shorter than clypeus; eyes slightly convergent below; lateral ocelli slightly nearer eyes than to each other; cheeks subequal to eyes in width; face below ocelli shining, punctures very minute and well separated, although not sparse, becoming quite obscure on the shining vertex; cheeks somewhat shining, very obscurely but rather closely punctate above, becoming smooth below, not appreciably striate; hypostomal carinae subparallel, apical angle very broadly rounded; lower half of face shining, punctures somewhat more deep and distinct than those above and somewhat more widely separated, those on supraclypeal area and upper portion of clypeus very minute and indistinct, quite sparse, becoming somewhat more deep and distinct on clypeus apically, the apical third somewhat blackened; scutum and scutellum rather dull (fig. 99), punctures exceedingly minute and obscure, quite sparse, even between notaulices and tegulae; pleura rather dull, tessellate, with a few vague and indefinite punctures visible at certain angles; dorsal area of propodeum quite broad, rather smooth and shining medially, except for a basal fringe of very short striae and a single nearly complete median stria, becoming more regularly and completely striate laterally, lateral faces smooth but rather dull, minutely tessellate; wings whitish-hyaline, veins and stigma very pale yellowish, almost white and very obscure; tegulae testaceous-hyaline; legs piceous basally, becoming testaceous on tarsi; abdominal terga shining, basal tergum impunctate, terga 2 and 3 with exceedingly minute and obscure but rather close punctures across basal half, becoming practically impunctate apically, apical margins very slightly but broadly impressed, this area becoming gradually whitish-hyaline at rims, the apical terga with a very thin covering of whitish pubescence which does not at all obscure the surface.
MALE—Length 4 mm.; head and thorax green, abdomen blackish; pubescence short, thin, entirely white, quite dense on lower half of face and on cheeks; head very slightly broader than long; clypeus rather short and broad, slightly convex, projecting about one- half below suborbital line; eyes strongly convergent below; lateral ocelli slightly nearer eyes than to each other; antennae much nearer eyes than to each other, basal segment of flagellum slightly broader than long, 2nd and following segments about twice this length, piceous above, only very faintly reddened beneath; mandibles reddened apically, the lab- rum dark; cheeks narrower than eyes; face below ocelli somewhat shining, punctures very fine but rather deep, distinct and quite close, becoming minute and well separated on the shining vertex; cheeks above shining, minutely and obscurely punctate, punctures becoming somewhat more deep and distinct below, ventral surface relatively smooth and shining; hypostomal carinae subparallel; lower half of face shining beneath the dense tomentum, punctures deep and distinct, fine and quite close, becoming quite minute on supraclypeal area and clypeus; scutum and scutellum dull, very finely but quite densely tessellate, punctures minute and sparse over entire scutum, scutellum not appreciably grooved medially; pleura smooth but rather dull, densely tessellate, with scattered, minute and obscure punctures; dorsal area of propodeum quite broad, coarsely and completely rugose, somewhat irregularly so medially, lateral surfaces somewhat shining, finely roughened; wings whitish hyaline, veins and stigma testaceous; tegulae yellowish-hyaline with darker blotches; legs piceous, tarsi yellow; abdominal terga smooth and shining, punctures minute, quite evenly distributed over most of discs, the narrow, apical, impressed margins impunctate, concolorous with basal areas of discs; apical margin of sternum 5 straight; sternum 7 as in zephyrus (fig. 101); gonostylus of armature as shown (fig. 102), retrorse lobe slender and elongate, nearly reaching basal ring.
DISTRIBUTION—North Carolina to Florida; February to October.
FLOWER RECORDS—Amelanchier, Aster, Ceanothus, Chrysopsis, Gerardia, Hypericum, hex, Isopappus, Melilotus, Prunus, Rhus, Salix and Solidago.
Extracted from Jason Gibbs. 2011. Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini.) Zootaxa.
Lasioglossum (Dialictus) apopkense (Robertson)
Halictus apopkensis Robertson, 1892: 272 ♀.
Lectotype. ♀ USA, Florida, Inverness, 12.ii.1891 (C. Robertson); [INHS: 9991] by W. E. LaBerge (in Webb 1980). Examined
Taxonomy. Michener, 1951: Lasioglossum (Chloralictus) apopkense, p. 1112 (catalogue); Mitchell, 1960: Dialictus apopkensis,
p. 382 (redescription); Krombein, 1967: Lasioglossum (Dialictus) alachuense, p. 462 (catalogue); Moure and
Hurd, 1987: Dialictus apopkensis, p. 90 (catalogue).
Diagnosis. Both sexes of L. apopkense can be recognised by the following diagnostic combination: size small (3.7–
4.8 mm); mesoscutum dull due to coarse microsculpture, punctation sparse throughout (Figs. 58, 60); propodeal carinae
strong; and metasomal terga impunctate on apical halves. Female L. apopkense are most similar to L. achilleae, which
have mesoscutum polished due to lack of microsculpture.
Redescription. FEMALE. Length 3.66–4.80 mm; head length 1.06–1.36 mm; head width 1.15–1.46 mm; forewing
length 2.66–3.51 mm.
Colouration. Head and mesoscutum pale bluish green to pale green. Mandible dark orange. Clypeus with apical half
blackish brown. Antenna dark brown, flagellomeres with ventral surface reddish brown. Metapostnotum blue. Tegula
pale amber. Wing venation and pterostigma pale yellow. Wing membranes hyaline with pale hairs. Legs brown, except
metabasitarsus infused with reddish brown, medio- and distitarsi reddish brown. Metasoma brown, terga and sterna with
apical margins reddish brown, T2–T4 apical margins translucent yellow.
Pubescence. Dull white. Mostly sparse. Head and mesosoma with sparse woolly hairs (1–2 OD), longest on genal
beard, metanotum, and mesopleuron (2–2.5 OD). Lower paraocular area with tomentum. Gena with sparse tomentum.
Propodeum with plumose hairs on lateral and posterior surfaces (2–2.5 OD). Metasomal terga with sparse, fine hairs. T1
acarinarial fan sparse with wide dorsal opening, equal to width of lateral fan. T2–T3 basolaterally and T4 entirely with
very sparse tomentum. T3–T4 with very sparse apical fringes.
Surface sculpture. Face polished, weakly imbricate, punctation moderately fine. Clypeus polished, punctation sparse
(i=1–3d). Supraclypeal area with punctation sparse (i=3–5d). Lower paraocular area punctation dense (i
Structure. Head wide (length/width ratio = 0.92–0.93). Eyes weakly convergent below (UOD/LOD ratio = 1.24–
1.25). Clypeus 1/3 below suborbital tangent, apicolateral margins convergent. Antennal sockets close (IAD/OAD < 0.5).
Frontal line carinate, ending 2OD below median ocellus. Eye wider than gena. Inner metatibial spur pectinate with 3–4
branches. Metapostnotum relatively elongate (MMR ratio = 1.18), posterior margin carinate, separated from posterior
surface. Propodeum with dorsolateral slope delimited below by strong oblique carina forming an obtuse angle, lateral
carina not reaching dorsal margin.
MALE. Similar to female except for the usual secondary sexual characters and as follows. Length 4.17–4.72 mm;
head length 1.10–1.33 mm; head width 1.18–1.38 mm; forewing length 3.21–3.48 mm.
Colouration. Mandible yellow on apical half. Flagellum with ventral surface reddish brown. Pterostigma pale
brownish yellow. Legs brown, except tarsi pale brownish yellow.
Pubescence. Face below eye emargination with scattered tomentum partially obscuring surface, denser on lower
paraocular area. Metasomal sterna sparsely pubescent, S3–S4 with small apicolateral tufts (1 OD).
Surface sculpture. Dorsolateral slope coarsely rugose.
Structure. Head wide (length/width ratio = 0.94–0.97). Eyes strongly convergent below (UOD/LOD ratio = 1.55–
1.61). Clypeus 2/3 below suborbital tangent, apicolateral margins weakly convergent. Antennal sockets distant (IAD/
OAD > 1.7). Frontal line carinate, ending 1.5 OD below median ocellus. Pedicel shorter than F1. F2 length 2.0X F1. F2–
F10 moderately elongate (length/width ratio = 1.31–1.64). Metapostnotum elongate (MMR ratio = 1.08–1.11), posterior
margin sharply angled onto posterior propodeal surface.
Terminalia. S7 with median lobe narrowly clavate, apex rounded (Fig. 61). S8 with apicomedial margin weakly convex
(Fig. 61). Genital capsule as in Fig. 61. Gonobase with ventral rim distinctly separated. Gonostylus small, dorsal
setae elongate. Retrorse lobe elongate, attenuated apically.
Range. Georgia, Mississippi north to New Jersey pine barrens (Fig. 56). USA: AL, GA, FL, MS, NC, NJ, SC, TX,
Additional material examined. USA: ALABAMA: 1♀ Baldwin Co., Bon Secour N.W. Ref., T9S R2E Sec. 23 SE,
12.x.1991 (G.C. Eickwort); 1♀ Baldwin Co., Bon Secour N.W. Ref., T9S R2E Sec. 25 S, 12.x.1991 (G.C. Eickwort); 1♀
Baldwin Co., Bon Secour N.W. Ref., T9S R2E Sec. 25 N, 13.x.1991 (G.C. Eickwort); 1♂ Baldwin Co., Bon Secour N.W.
Ref., T9S R2E Sec. 25 N, 12–16.x.1991 (T. Schiefer & G.C. Eickwort); [CUIC]; GEORGIA: 1♀ Jasper Co., Oconee
N.F., Starr Rd., 18.vii.2008 (J. Hanula & S. Horn); 1♀ Jasper Co., Oconee N.F., Julliett Rd/Powerline, 18.vii.2008 (J.
Hanula & S. Horn); 10♀♀ Liberty Co., St. Catherine’s Isl., N31°41′ W081°9′. 30.iv–4.v.1995 (A. Sharkov); [PCYU];
FLORIDA: 11♀ Leon Co., Apalachicola National Forest, "ant heaven", N30.31687 W084.50008, 20–27.vi.2005 (Ronquist
Lab); 1♀ Putnam Co., Ordway-Swisher Biological Station (UF), Rd. G-11, 14.x.2009 (J.S. Ascher, H.G. Hall);
[AMNH]; 1♀ Alachua Co., 28.ii.1930 (C.J. Guard); [CUIC]; 1♀ paratype, Inverness, (C. Robertson); [INHS]; MISSISSIPPI:
1♀ Jackson Co., N30.5297 W088.6942, 4–5.vi.2005 (S.W. Droege); [PCYU]; NORTH CAROLINA: 5♀♀ Moore
Co., Southern Pines, N35.17389 W079.3925, 159 m, 22.iii.1918; 1♀ Moore Co., Southern Pines, N35.17389
W079.3925, 159 m, 10.iv.1918; [AMNH]; 1♀ So. Pines, 26.iii.1923 (A.H. Manee); [CNC]; 1♀ Holly Shelter, 16.ix.1952
(T.B. Mitchell); 1♂ Holly Shelter, 9.x.1954 (T.B. Mitchell); 1♀ Raleigh, 11.vii.1949 (M.W. Wing); [CUIC]; SOUTH CAROLINA: 1♂ C. Sandhills NWR, N34.5597 W080.2561, 6.ix.2006 (S.W. Droege); 1♀ Chesterfield Co., N34.5825
W080.2201, 29.v.2007 (S.W. Droege); 3♀♀ Chesterfield Co., N34.48889 W080.3012, 25.ix.2007 (S.W. Droege); 1♀
Chesterfield Co., N34.5303 W080.3028, 25.ix.2007 (S.W. Droege); 1♂ Chesterfield Co., N34.5306 W080.225,
26.ix.2007 (S.W. Droege); 1♀ Horry Co., N33.6873 W078.8831, 17.viii.2004 (S. Na); 1♀ Williamsburg Co., N33.7103
W079.4425, 17.vii.2007 (D. Green); TEXAS: 1♀ Nacogdoches Co., N31.5011 W094.7839, 9–22.ix.2010 (C. Adams);
[CUIC]; VIRGINIA: 1♀ Assateague I., N37.9086 W075.3564, 1–2.vii.2006 (S.W. Droege); 1♀ Assateague I., N37.9181
W075.3274, 30.vi–1.vii.2006 (S.W. Droege); [PCYU].
Floral records. AQUIFOLIACEAE: Ilex; ASTERACEAE: Aster, Chrysopsis, Croptilion, Solidago; CARDIACEAE:
Rhus; CLUSIACEAE: Hypericum; FABACEAE: Melilotus; POLYGONACEAE: Polygonella; RHAMNACEAE:
Ceanothus; ROSACEAE: Amelanchier, Prunus; SALICACEAE: Salix; UNCERTAIN: “Gerardia”.
DNA Barcode. Available. Multiple sequences.