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Identification Summary: Small; Florida; blue or blue green thorax, may or may not have a very thin yellow line along the rim of the clypeus, need to look at more specimens to determine that; mesepisturnum smooth, glossy, and clearly and heavily pitted; pits on scutum moderately spaced out 1-2 pit diameters on average apart; orange-yellow abdomen which may be darker than some of the other Florida species, need to see more specimens; tegula pale, enlarged as in L. tegulare but less distinctive.
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 5 mm.; head and thorax olive green, clypeus and mandibles in large part testaceous, abdomen more or less reddish-testaceous, and tarsi testaceous; pubescence exceedingly short, thin and inconspicuous, entirely pale, somewhat more elongate on abdomen laterally, but apical terga fully exposed; length and breadth of head about equal; clypeus projecting about two-thirds below suborbital line; supraclypeal area about equal to clypeus in length; eyes convergent below; lateral ocelli only very slightly nearer eyes than to each other; cheeks subequal to eyes in width; upper part of face finely and closely but quite deeply punctate, punctures becoming somewhat more sparse on each side of antennae, but lower portion of face with rather coarse, deep, distinct and quite close punctures, those on supraclypeal area very fine and sparse, upper margin of clypeus with a few minute punctures along upper margin, punctures below this quite coarse and rather widely separated; punctures on vertex laterally fine and quite close but distinct, upper portion of cheeks shining, with minute, close and rather obscure punctures, becoming very finely and closely striate below; hypostomal carinae parallel, apical angle rather narrowly rounded; scutum and scutellum rather dull, finely tessellate, punctures fine, well separated in central area of disc, but quite close, although not crowded, between notaulices and tegulae, scutellum quite evenly and finely punctate; pleura dull, quite closely and finely punctate, hypoepimeral area very closely but rather distinctly and finely punctate; dorsal area of propodeum rather finely but quite completely rugoso-punctate, more definitely striate at extreme sides, lateral faces rather smooth and somewhat shining; wings subhyaline, veins and stigma reddish-testaceous, 2nd submarginal cell somewhat shorter than 3rd, receiving 1st recurrent near apex; tegulae yellow; legs dark basally, but all the tarsi pale testaceous or yellow, tibiae more or less yellowish at base and apex; abdominal terga shining, very finely but rather distinctly and closely punctate across discs, apical margins rather narrow but quite distinct, only microscopically punctate, largely yellowish-hyaline, discal pubescence extremely short, thin and obscure, fully exposing all of the tergal plates.
Extracted from Jason Gibbs. 2011. Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini.) Zootaxa.
Lasioglossum (Dialictus) surianae (Mitchell)
Dialictus surianae Mitchell, 1960: 420. ♀.
Holotype. ♀ USA, Florida, Plantation Key, 27.xi.1955 (H.V. Weems, Jr.); [FCSA]
Taxonomy. Krombein, 1967: Lasioglossum (Dialictus) surianae, p. 466 (catalogue); Moure and Hurd, 1987: Dialictus surianae, p. 132 (catalogue).
Diagnosis. Both sexes of L. surianae can be recognised by the following diagnostic combination: tegula enlarged, pale yellow, with posterior angle (Figs. 201, 203), and fine punctation. Female L. surianae have metasomal terga reddish
orange (Fig. 200A).
Redescription. FEMALE. Length 4.31–4.42 mm; head length 1.22–1.33 mm; head width 1.27–1.36 mm; forewing
length 2.94–2.96 mm.
Colouration. Head and mesosoma pale golden green. Labrum and lower paraocular area orange. Mandible brownish yellow. Clypeus with apical half orange to reddish. Antenna brown, flagellum with ventral surface brownish orange. Tegula orange. Wing faintly dusky, venation and pterostigma reddish brown. Legs brown, except tarsi brownish yellow. Metasoma brownish red, terga and sterna with apical margins brownish yellow.
Pubescence. Dull 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). Gena with sparse subappressed tomentum. Propodeum with moderately dense plumose hairs on lateral and posterior surfaces (1.5–2 OD). Metasomal terga with sparse,
fine hairs. T1 acarinarial fan complete. T2–T4 basolaterally with very sparse tomentum. T2 apicolateral and T3–T4 apical margins with very sparse fringes, virtually absent.
Surface sculpture. Face imbricate, punctation moderately strong. Clypeus polished, basal margin imbricate, punctation
moderately dense (i=1–1.5d). Supraclypeal area with punctation moderately sparse (i=1–3d). Lower paraocular area punctation dense (i
Structure. Head moderately wide (length/width ratio = 0.96–0.97). Eyes convergent below (UOD/LOD ratio = 1.26– 1.27). Clypeus ˝ below suborbital tangent, apicolateral margins convergent. Antennal sockets close (IAD/OAD < 0.5). Frontal line carinate, ending 2 OD below median ocellus. Gena narrower than eye. Tegula elongate, angulate posteromedially. Inner metatibial spur pectinate with 2–3 branches. Metapostnotum relatively elongate (MMR ratio = 1.15), posterior margin weakly angled onto posterior surface. Propodeum with oblique carina weak, lateral carina weak, not reaching
dorsal margin.
MALE (metasoma not examined). Similar to female except for the usual secondary sexual characters and as follows. Head length 1.28 mm; head width 1.28 mm; forewing length 2.94 mm.
Colouration. Mandible, flagellum ventral surface, tegula, tarsi brownish yellow.
Pubescence. Lower paraocular area tomentum obscuring surface.
Surface sculpture. Clypeus densely punctate (i=d). Mesepisternum polished, punctate (i=d). Propodeum posterior surface punctate.
Structure. Head elongate (length/width ratio = 1.00). Eyes strongly convergent below (UOD/LOD ratio = 1.52). Clypeus 2/3 below suborbital tangent, apicolateral margins subparallel. Antennal sockets distant (IAD/OAD > 0.7). Frontal line carinate, ending 2 OD below median ocellus. Pedicel shorter than F1. F2 length 1.6X F1. F2–F10 moderately elongate (length/width ratio = 1.30–1.45). Metapostnotum elongate (MMR ratio = 1.28), posterior margin rounded onto posterior surface.
Terminalia. Not examined.
Range. Southern Florida, Bahamas (Fig. 199).
Additional material examined. BAHAMAS: 2♀♀ Great Exuma, Georgetown N., Isl. #26, N23.5 W75.75,
8.viii.2004 (M.F. Keller); [PCYU]; 1♂ Gorda Cay, N26°05′ W77°32′, 26.vi–7.vii.1998 (T. Peak); 1♀ Gorda Cay,
N26°05′ W77°32′, 7–16.vii.1998 (T. Peak); [UCFC]. USA: FLORIDA: 1♀ paratype Key Vaca, 28.xii.1955 (H.V.
Weems, Jr.); 1♀ Monroe Co., Stock Island, 15.x.1963 (H.V. Weems, Jr.); Monroe Co., Big Pine Key, 23.vi.1971 (W.H.
Pierce); 1♂ Monroe Co., Big Pine Key, 19.v.1971 (W.H. Pierce); [CUIC].
Floral records. ASTERACEAE: Bidens pilosa; CONVOLVULACEAE: Jacquemontia SURIANACEAE: Suriana maritima.
DNA Barcode. Available. Single sequence.
Comments. Rare.
Lasioglossum surianae belongs to the L. tegulare species group (equivalent to the L. parvum group of Eickwort(1988)). It is similar to the West Indian species L. gemmatum (Smith).
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