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Identification Summary: Large; very similar to L. bruneri; shovel-shaped hypostomal cavity, unlike L. bruneri does not have a clearly raised or carinate edge; large pits in center of scutum but sides of scutum have no pits just raised reticulations and bumps; mesepisturnum heavily rugose; propodeal triangle striations distinctive but hard to describe; lots of appressed hairs on abdomen. Hind tibia and tarsal segments often with an orangish-brown hue.
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 8 mm.; head and thorax olive green, abdomen more piceous; pubescence short and rather thin, entirely yellowish-white; head somewhat broader than long; clypeus very broadly convex, projecting somewhat less than one-half below suborbital line, apical half blackened; supraclypeal area somewhat broader than long, and shorter than clypeus; eyes convergent below; lateral ocelli slightly nearer eyes than to each other; cheeks considerably broader than eyes; upper half of face coarsely and deeply punctate, closely so medially, but becoming somewhat more sparse laterally, and becoming fine and irregular on vertex laterally; cheeks above somewhat shining, punctures minute and obscure, becoming rather coarsely striate posteriorly and below; hypostomal cannae widely divergent over apical half, very slightly produced at apical angle which is very close to base of mandible; lower half of face somewhat shining, punctures quite coarse and deep, well separated but not sparse, those on supraclypeal area rather close and fine laterally, becoming rather sparse medially, those on clypeus quite deep and distinct, moderately coarse even along upper margin, becoming somewhat deeper and still more coarse, but rather close apically; scutum medially somewhat shining, punctures rather coarse and deep, well separated, becoming coarsely rugose laterally and anteriorly (much as in nymphacarum, fig. 99); scutellum shining, very irregularly and rather sparsely punctate; pleura very coarsely rugose above, becoming rather finely striate and to some degree shining below; dorsal area of propodeum medially rather coarsely rugoso-striate, but becoming rather definitely, coarsely, short striate laterally, posterior face completely encircled with a distinct salient rim, lateral faces rather dull, very finely rugoso-striate; wings lightly infuscated, veins and stigma brownish; tegulae brownish, becoming yellowish-hyaline on outer anterior margin; legs piceous basally becoming more brownish apically; outer margin of front coxae strongly carinate, front trochanters slender, cylindrical; abdominal terga more or less shining, punctures exceedingly minute, barely visible across central area of tergum 1, terga 2 and 3 more uniformly punctate, apical impressed margins minutely and rather closely punctate, more or less reddened, becoming almost hyaline on the rims; pubescence on apical terga relatively thin, not obscuring the surface.
MALE—Length 7 mm.; head and thorax olive green, abdomen blackish; pubescence short, thin, entirely white; length and breadth of head subequal; clypeus rather narrow, projecting about one-half below suborbital line; eyes strongly convergent below; lateral ocelli much nearer eyes than to each other; antennae subequally distant from eyes and each other, basal segment of flagellum about as broad as long, slightly longer than pedicel, following segments considerably longer, but length not equalling twice the breadth, reddish-piceous beneath, almost black above; mandibles slender and simple, brownish-testaceous; labrum also brownish-testaceous; cheeks somewhat narrower than eyes; face below ocelli deeply, distinctly and very closely punctate, punctures becoming minute and obscure on shining vertex; cheeks above somewhat shining, becoming coarsely striate posteriorly and below; hypostomal carinae subparallel; lower half of face somewhat shining beneath dense tomentum, punctures very fine and well separated, especially on supraclypeal area and clypeus; scutum somewhat shining, coarsely and deeply punctate, punctures rather close but definitely separated medially, becoming rather coarsely rugoso-punctate anteriorly and laterally, scutellum shining, punctures rather irregularly distributed, somewhat swollen on each side of a slight median depression and becoming narrowly rugose posteriorly; pleura coarsely rugose above and anteriorly, becoming more definitely striate posteriorly and below; dorsal area of propodeum very coarsely striate, the striae somewhat irregular medially, but complete, posterior face with conspicuous marginal carinae ventrally, but these not continuous dorsally, lateral faces rather dull, rather finely and obscurely rugoso-striate; wings subhyaline, veins and stigma brownish-testaceous; tegulae yellowish-hyaline; basal segments of legs piceous, tibiae largely brownish-testaceous, somewhat darker medially, tarsi more yellow-testaceous; abdominal terga shining, punctures minute but rather close and distinct, evenly distributed, apical depressed rims narrowly impunctate, these becoming increasingly broader on the more apical terga; sternum 5 straight apically; median lobe of sternum 7 narrow and elongate, slightly constricted at base, rounded apically; gonostylus of armature as shown (fig. 102), retrorse lobe rather expansive, very sparsely covered with short, fine pubescence.
DISTRIBUTION—Illinois and Michigan to Maine, south to Florida; March to September, throughout the year in Florida.
FLOWER RECORDS—Aronia, Bidens, Crataegus, Melilotus, Prunus, Rhus, Rubus, Solidago and Vaccinium.
Extracted from Jason Gibbs. 2011. Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini.) Zootaxa.
Lasioglossum (Dialictus) reticulatum (Robertson)
Halictus fulvipes Smith, 1853: 67. ♀. (junior primary homonym of Halictus fulvipes Klug, in Germar, 1817)
Holotype. ♀ USA, Florida (East), St. John’s Bluff; [BMNH]. Examined.
Halictus reticulatus Robertson, 1892: 268. ♀.
Lectotype. ♀ USA, Florida, Citrus Co., Inverness, 12.ii.1891 (C. Robertson) [INHS: 9987] by W. E. LaBerge (in Webb
1980). Examined.
Halictus rhododactylus Dalla Torre, 1896: 80 (replacement name for H. fulvipes Smith).
Taxonomy. Michener, 1951: Lasioglossum (Chloralictus) reticulatum, p. 1117 (catalogue); Mitchell, 1960: Dialictus
reticulatus, p. 416 (redescription); Krombein, 1967: Lasioglossum (Dialictus) reticulatum, p. 465 (catalogue); Moure and
Hurd, 1987: Dialictus reticulatus, p. 126 (catalogue).
Diagnosis. Female L. reticulatum can be distinguished from all other eastern USA Dialictus except L. bruneri by the
widely divergent hypostomal carinae (Fig. 10C) and coarsely sculptured mesosoma (Figs. 4A, 176). Female L. reticulatum
lack the distally produced hypostomal carina and anteriorly excavated protrochanter that are present in L. bruneri.
Diagnosis. Female L. reticulatum can be distinguished from all other eastern USA Dialictus except L. bruneri by the
widely divergent hypostomal carinae (Fig. 10C) and coarsely sculptured mesosoma (Figs. 4A, 176). Female L. reticulatum
lack the distally produced hypostomal carina and anteriorly excavated protrochanter that are present in L. bruneri.
Male L. reticulatum can be recognised by the combination of mesoscutum rugose on anterior margin (Fig. 178),
mesepisternum coarsely rugose, and tibiae and femora and reddish brown (Fig. 177A). They are most similar L. bruneri,
which have tibiae and femora dark brown.
Redescription. FEMALE. Length 6.23–6.66 mm; head length 1.63–1.92 mm; head width 1.74–2.02 mm; forewing length 4.17–4.96 mm.
Colouration. Head and mesosoma bluish green. Labrum and mandible reddish brown. Antenna blackish brown, flagellum
with ventral surface brown. Tegula reddish brown. Wing venation and pterostigma amber. Legs brown except tarsi, outer surface of protibia, apex and base of mesotibia, and metatibia reddish brown to amber. Metasoma blackish brown, terga and sterna with apical margins reddish brown.
Pubescence. Dull white to yellowish white. Moderately dense. Head and mesosoma with moderately dense woolly
hairs (1–1.5 OD), longest on genal beard, metanotum, and mesopleuron (2–2.5 OD). Paraocular area with sparse subappressed
hairs. Gena with sparse tomentum. Propodeum with moderately dense plumose hairs on lateral and posterior surfaces
(2–2.5 OD). Metasomal terga with sparse, fine hairs. T1 acarinarial fan with narrow dorsomedial opening above,
nearly reaching upper margin of declivitous surface. T2–T3 basolateral areas obscured by dense tomentum. T4 disc
largely obscured by dense tomentum and with sparse, fringes. T2 apicolateral and T3–T4 apical margins with sparse apical
fringes.
Surface sculpture. Face weakly imbricate, punctation strong. Clypeal punctation moderately dense (i=1–2d). Supraclypeal
area and lower paraocular are punctation dense (i
Structure. Head wide (length/width ratio = 0.93–0.94). Eyes convergent below (UOD/LOD ratio = 1.10–1.18).
Clypeus 1/2 below suborbital line, apicolateral angles rounded. Antennal sockets close (IAD/OAD < 0.5). Frontal line
carinate, ending 2 OD below median ocellus. Gena nearly as wide as eye. Hypostomal area deeply excavated, carinae
widely divergent towards mandible bases. Pronotum with dorsolateral angle obtuse. Inner metatibial spur pectinate with
3–4 branches. Metapostnotum delimited from remainder of dorsal surface weak carina. Metapostnotum relatively truncate
(MMR ratio = 1.29–1.50), posterior margin carinate. Propodeum with oblique carina strong, lateral carina reaching
dorsal margin.
MALE. Similar to female except for the usual secondary sexual characters and as follows. Length 5.81 mm; head
length 1.66 mm; head width 1.70 mm; forewing length 4.17–4.36 mm.
Colouration. Head and mesosoma dull metallic blue with green reflections. Flagellum with ventral surface reddish
brown. Tegula yellowish brown. Wing venation and pterostigma brownish yellow. Legs brown, except metafemora dorsally,
tibiae, and tarsi brownish yellow to orange.
Pubescence. Face with tomentum obscuring lower paraocular area and partially obscuring clypeus, supraclypeal
area, upper paraocular area and frons. Metasomal terga without tomentum. S3 with dense plumose hairs and S4–S5 with
lateral plumose hairs.
Surface sculpture. Coarse throughout. Mesoscutellum reticulate. Metepisternum rugoso-carinulate. Metasomal terga
with apical impressed margins virtually impunctate.
Structure. Head moderately wide (length/width ratio = 0.97). Eyes strongly convergent below (UOD/LOD ratio =
1.40). Clypeus 2/3 below suborbital line, apicolateral margins subparallel. Antennal sockets distant (IAD/OAD < 1.3).
Frontal line carinate, ending <2 OD below median ocellus. Hypostomal carinae only slightly divergent towards mandibles.
Pedicel shorter than F1. F2 length 1.8X F1. F2–F10 moderately elongate (length/width ratio = 1.38–1.83). Metapostnotum
moderately elongate (MMR ratio = 1.21), posterior margin sharply angled onto posterior surface.
Terminalia. S7 with median lobe narrowly clavate, sides concave, apex rounded (Fig. 179). S8 with apicomedial
margin weakly convex (Fig. 179). Genital capsule as in Fig. 179. Gonobase with ventral arms narrowly separated. Volsella
roughly ovoid. Gonostylus narrow and elongate, dorsal setae elongate. Retrorse lobe elongate, attenuated apically.
Range. South-eastern USA (Fig. 174). USA: AL, FL, GA, NC, SC, TX.
Additional material examined. USA: ALABAMA: 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. 23 E, 24 W, 12–16.x.1991 (T.
Scheifer); FLORIDA: 1♀ Bay Co., St. Andrews S.P., 17.iv.1964 (G.C. Eickwort); 1♂ Lake Co., Leesburg, 8.v.1961 (C.H.
Curran); 1♀ Levy Co., 13.ix.1955 (R.A. Morse); 1♀ Marion Co., Ocala N.F., 30 mi E Ocala, 30.iii.1974 (G.C. Eickwort);
[CUIC]; 1♀ Alachua Co., Gainesville, 18–25.vi.1987 (D.B. Wahl); [CNC]; 1♀1♂ Inverness (C. Robertson); [INHS]; 1♀
Duval Co., 2.iv.1959 (T.B. Mitchell); [NCSU]; 2♂♂ Sarasota Co., MCC – Venice Campus, 24.iii.1997 (K.J. Maharay,
S.M. Fullerton); 26♀♀ Seminole Co., Lower Wekiva River St. Pres., 22.vii.2001 (P. Russell, S. Fullerton); 50♀♀
Seminole Co., Lower Wekiva River St. Pres., 2.xii.2001 (P. Russell, S. Fullerton); [UCFC]; GEORGIA: 72 ♀♀ Liberty
Co., St. Catherines Isl., N31◦41′ W81◦09′, 31.iv–04.v.1995 (A. Sharkov); 12 ♀♀ Liberty Co., St. Catherines Isl.,
N31◦40.3′ W81◦09.5′, 23-28.vi.1996 (A. Sharkov); 24 ♀♀ Liberty Co., St. Catherines Isl., Road b/w Windmill 2nd and
Gator Pond, 22–27.vi.1995 (A. Sharkov); [PCYU]; 1♀ McIntosh Co., Sapelo Isl, 28.iv–9.v.1987 (BRC Hym Team);
[CNC]; NORTH CAROLINA: 1♀ Carolina beach, 20.iv.1930; [CUIC]; TEXAS: 1♀ Nacogdoches Co., N31.5011
W094.7839, 2–18.vi.2010 (C. Adams); [CUIC]; SOUTH CAROLINA: 7♀♀ Dorchester Co., Francis Beidler For., 10 km
NE Harleyville, bald cypress swamp, 11–23.vi.1987; 28♀♀ 3♂♂ Hilton Head Is., 11–23.vii.1965 (H.F. Howden); [CNC].
Floral records. ANACARDIACEAE: Rhus; ASTERACEAE: Bidens, Solidago; CAPRIFOLIACEAE: Lonicera
dioica; ERICACEAE: Vaccinium; FABACEAE: Melilotus; ROSACEAE: Crataegus, Photinia, Prunus, Rubus; SMILACACEAE:
Smilax ecirrhata, S. herbacea, S. tamnoides.
DNA Barcode. Available.
Comments. Common.
Some specimens of L. bruneri particularly in the Midwest lack strongly produced hypostomal carinae. These have sometimes been mistaken for L. reticulatum as a result.
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