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Identification Summary: Moderate sized; Florida; mandibles and lower clypeus orange-red; with extensive orange color on the legs; similar to L. tarponense but larger with brown on upper legs and without evident punctures on mesepisternum.
Reprinted with permission from: Mitchell, T.B. 1960 Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 141.
FEMALELength 6 mm.; head and thorax bluish-green, abdomen piceous, tibiae and tarsi testaceous, basal segments of legs piceous; pubescence entirely pale, very short and thin, apical abdominal terga fully exposed; head very slightly broader than long; clypeus projecting about one-half below suborbital line, apical margin obscurely reddened; supraclypeal area unequal in length to clypeus; eyes convergent below; lateral ocelli considerably nearer eyes than to each other; cheeks sub- equal to eyes in width; upper part of face rather dull, punctures quite close but rather shallow, these becoming more sparse below antennae, supraclypeal area with well separated punctures, these becoming somewhat closer on upper part of clypeus, becoming more deep, distinct and much more sparse toward apical margin, vertex and cheeks somewhat shining, practically impunctate; hypostomal carinae parallel, apical angle broadly rounded, surface on each side smooth and shining; scutum and scutellum somewhat shining, punctures rather fine but distinct, rather sparse in center of scutum, but becoming much closer but still well separated between notaulices and tegulae (somewhat similar to inconspicuous, fig. 99) pleura relatively smooth, somewhat shining, without evident punctures; dorsal area of propodeum quite coarsely and completely striate on each side, the median portion with very incomplete and rather widely separated striations, lateral faces of propodeum somewhat shining, rather smooth; wings hyaline, veins testaceous, stigma more brownish-testaceous, 2nd submarginal cell shorter than 3rd, receiving 1st recurrent vein near apex; tegulae yellowish-hyaline; abdominal terga quite smooth, punctures of the basal segments extremely minute and obscure, those on terga 3 and 4 somewhat more distinct, quite close, the impressed apical rims impunctate, somewhat yellowish, pubescence very short, thin, entirely whitish.
TYPESHolotype: Female, Alachua Co., Fla., Sept. 20, 1955 (H. V. Weems, Jr.) [Fla. Plant Board]. Paratypes: 1 female, topotypical; 1 female, Billys Id., Okefenokee Swamp, Ga., June 1912 [Cornell].
Extracted from Jason Gibbs. 2011. Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini.) Zootaxa.
Lasioglossum (Dialictus) alachuense (Mitchell)
Dialictus alachuensis Mitchell, 1960: 378. ♀.
Holotype. ♀ USA, Florida, Alachua Co., 20.ix.1955 (H.V. Weems, Jr.); [FSCA]. Examined.
Taxonomy. Krombein, 1967: Lasioglossum (Dialictus) alachuense, p. 462 (catalogue); Moure and Hurd, 1987: Dialictus
alachuensis, p. 88 (catalogue).
Diagnosis. Female L. alachuense can be recognised by the following diagnostic combination: apical half of clypeus
brown to reddish-orange; mesoscutum imbricate-tessellate, punctures sparse between parapsidal lines (i=12.5d) (Fig.
48); mesepisternum rugulose; tegula pale yellow; metatibia with extensive orange-yellow (Fig. 47A); metapostnotal
rugae relatively fine; T1 fan with wide dorsal opening (Fig. 48); and metasoma terga blackish brown with no appressed
tomentum. They are superficially similar to L. leviense, which has sparse tomentum on metasomal terga.
Male L. alachuense can be recognised by the combination of clypeus with distal margin yellow (Fig. 49B);
mesoscutum imbricate, punctation sparse between parapsidal lines (i=12.5d) (Fig. 50); mesepisternum finely ruguloseimbricate;
tegula pale yellow; tibiae and tarsi almost entirely brownish yellow; metasomal terga without tomentum,
apical impressed areas impunctate; and S4S5 with apicolateral hairs. They are most similar to L. leviense which are
smaller, more finely rugulose on mesepisternum, and tibiae less extensively brownish yellow.
Redescription. FEMALE. Length 4.235.02 mm; head length 1.271.43 mm; head width 1.321.51 mm; forewing
length 3.333.69 mm.
Colouration. Head and mesosoma pale green to blue. Clypeus with apical half blackish brown to reddish orange.
Antenna dark brown, flagellum with ventral surface reddish brown. Tegula pale yellow. Wing membrane subhyaline,
venation and pterostigma yellowish brown. Legs brown except tarsi, and apical and basal portions of tibiae yellow to
amber, pro- and metatibiae sometimes with more extensive pale colouration. Metasoma dark brown, terga and sterna with
apical margins translucent brownish yellow.
Pubescence. Dull white. Moderately sparse. Head and mesosoma with moderately sparse woolly hairs (12 OD),
longest on genal beard, metanotum, and mesopleuron (22.5 OD). Paraocular area and gena with sparse subappressed
tomentum. Propodeum with moderately dense plumose hairs on lateral and posterior surfaces (22.5 OD). Metasomal
terga with moderately sparse, fine hairs. T1 acarinarial fan limited to small lateral area, dorsal opening wider than lateral
patches. T1T6 without tomentum. T2 apicolateral and T3T4 apical margins with sparse fringes.
Surface sculpture. Face imbricate, punctation fine. Clypeus with apical half polished, punctation sparse (i=13d).
Supraclypeal area with punctation moderately sparse (i=12d). Lower paraocular area punctation dense (i≤d). Antennocular
area punctation moderately dense (i=11.5d). Upper paraocular area and frons punctate-reticulate. Ocellocular area
obscurely punctate (i=d). Gena obscurely lineolate. Postgena weakly imbricate. Mesoscutum weakly imbricate, punctation
moderately sparse between parapsidal lines (i=12.5d), dense laterad of parapsidal line (i≤d), contiguous on anterolateral
portion. Mesoscutellum similar to mesoscutum, submedial punctation sparse (i=1.53d). Axilla minutely punctate.
Metanotum imbricate. Preλpisternum rugulose. Hypoepimeral area imbricate-rugulose. Mesepisternum dorsal half rugulose,
ventral half ruguloso-imbricate. Metepisternum with upper half carinulate and ventral portion imbricate. Metapostnotum
incompletely carinulate, posterior margin imbricate. Propodeum with dorsolateral slope imbricate, lateral surface
tessellate-imbricate, posterior surface imbricate. Metasomal terga polished, punctation moderately dense basally (i=1
1.5d), more widely spaced apically (i=12.5d).
Structure. Head very wide (length/width ratio = 0.940.96). Eyes convergent below (UOD/LOD ratio = 1.291.30).
Clypeus ½ below suborbital tangent, apicolateral angle convergent. Antennal sockets close (IAD/OAD < 0.5). Frontal
line carinate, ending 22.5 OD below median ocellus. Gena narrower than eye. Inner metatibial spur pectinate with 35
branches. Metapostnotum not truncate (MMR ratio = 1.001.14), posterior margin narrowly rounded onto posterior surface.
Propodeum with oblique carina absent, lateral carina not reaching dorsal margin.
MALE. Similar to female except for the usual secondary sexual characters and as follows. Length 4.754.88 mm;
head length 1.451.48 mm; head width 1.50 mm; forewing length 4.134.19 mm.
Colouration. Labrum, mandible, and distal margin of clypeus brownish yellow. Flagellum with ventral surface reddish
brown. Tegula brownish yellow. Legs brown, except tibiae mostly yellowish brown, tarsi pale brownish yellow.
Pubescence. Face below eye emargination with moderately dense tomentum partially obscuring surface. Metasomal
sterna sparsely pubescent, S4S5 with apicolateral tufts (1.5 OD).
Surface sculpture. Mesoscutum imbricate, punctation sparse between parapsidal lines (i=12.5d) and dense laterad
of parapsidal line (i≤1d). Metapostnotum with coarse longitudinal rugae, separated by wide smooth interstitial regions.
Propodeal dorsolateral slope coarsely rugose. T2 apical impressed area impunctate.
Structure. Head wide (length/width ratio = 0.970.98). Eyes strongly convergent below (UOD/LOD ratio = 1.57
1.59). Clypeus 2/3 below suborbital tangent, apicolateral margins weakly convergent. Antennal sockets distant (IAD/
OAD > 1.5). Frontal line carinate, ending 1.5 OD below median ocellus. Pedicel shorter than F1. F2 length 1.9X F1. F2
F10 elongate (length/width ratio = 1.731.90). Metapostnotum moderately elongate (MMR ratio = 1.131.17), posterior
margin sharply angled onto posterior propodeal surface.
Terminalia. Not examined.
Range. South-eastern USA (Fig. 44). USA: FL, GA.
Additional material examined. USA: FLORIDA: 3♀♀1♂ Leon Co., Apalachicola National Forest, FS366, LLP,
N30.19751 W084.30309, 1118.vii.2005 (Ronquist Lab); [AMNH]; 1♀ paratype Alachua Co., 20.ix.1955; 1♀ Alachua
Co., 20.ix.1955; 2♀♀ Liberty Co., 2.3 mi W. Hosford, Rt. 20, 13.vii.1979 (A. Lindsey); 2♀♀ Liberty Co., Torreya S.P.,
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Revision of metallic Lasioglossum (Dialictus) Zootaxa 3073 © 2011 Magnolia Press · 43
25.iii.1986 (B. Alexander); 1♀2♂♂ Oklaoosa Co., Rd. 232 at Turkey Creek, 4.x.1966 (P.A. Thomas); 2♀♀ Taylor Co.,
5.x.1960 (F.W. Head); [CUIC]; 2 ♀♀ Wakulla Co., Apalachicola N.F., Hwy 65, Post Office Bay, N30°3.565′
W084°59.051′, 29.v4.vi.2005 (A. Vanderby); 5 ♀♀ Wakulla Co., Apalachicola N.F., Hwy 65, Post Office Bay,
N30°3.565′ W084°59.051′, 1320.vi.2005 (Ronquist lab); 11 ♀♀ Wakulla Co., Apalachicola N.F., Hwy 65, Post Office
Bay, N30°3.565′ W084°59.057′, 2027.vi.2005 (Ronquist lab); 6 ♀♀ Wakulla Co., Apalachicola N.F., Hwy 65, Post
Office Bay, N30°3.565′ W084°59.051′, 27.vi5.vii.2005 (A. Vanderby); 2 ♀♀ Wakulla Co., Apalachicola N.F., FS 366,
N30°19.751′ W084°30.309′, 511.vii.2005 (Ronquist lab); 1 ♀♀ Wakulla Co., Apalachicola N.F., FS Road 390,
N30°21.696′ W084°49.399′, 1118.vii.2005 (Ronquist lab); [PCYU]; GEORGIA: 1♀ Cook Co., Reed Bingham S.P.,
29.iii.1974 (G.C. Eickwort); [CUIC].
Floral records. APIACEAE: Oxypolis filiformis.
DNA Barcode. Available. Multiple sequences. See comments.
Comments. Uncommon.
DNA barcodes do not distinguish L. alachuense from L. oblongum. The two species are closely related but differ by
multiple characters of surface sculpture and colour.
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Extracted from: Jason Gibbs. 2011. Revsion of the metallic Lasioglossum (Dialictus) of eastern North American (Hymenoptera: Halicidae: Halictini) Zootaxa 3073:1-216. Taxonomy. Krombein, 1967: Lasioglossum (Dialictus) alachuense, p. 462 (catalogue); Moure and Hurd, 1987: Dialictus
alachuensis, p. 88 (catalogue). Diagnosis. Female L. alachuense can be recognised by the following diagnostic combination: apical half of clypeus
brown to reddish-orange; mesoscutum imbricate-tessellate, punctures sparse between parapsidal lines (i=12.5d) (Fig.
48); mesepisternum rugulose; tegula pale yellow; metatibia with extensive orange-yellow (Fig. 47A); metapostnotal
rugae relatively fine; T1 fan with wide dorsal opening (Fig. 48); and metasoma terga blackish brown with no appressed
tomentum. They are superficially similar to L. leviense, which has sparse tomentum on metasomal terga. Male L. alachuense can be recognised by the combination of clypeus with distal margin yellow (Fig. 49B);
mesoscutum imbricate, punctation sparse between parapsidal lines (i=12.5d) (Fig. 50); mesepisternum finely ruguloseimbricate;
tegula pale yellow; tibiae and tarsi almost entirely brownish yellow; metasomal terga without tomentum,
apical impressed areas impunctate; and S4S5 with apicolateral hairs. They are most similar to L. leviense which are
smaller, more finely rugulose on mesepisternum, and tibiae less extensively brownish yellow. Redescription. FEMALE. Length 4.235.02 mm; head length 1.271.43 mm; head width 1.321.51 mm; forewing
length 3.333.69 mm. Colouration. Head and mesosoma pale green to blue. Clypeus with apical half blackish brown to reddish orange.
Antenna dark brown, flagellum with ventral surface reddish brown. Tegula pale yellow. Wing membrane subhyaline,
venation and pterostigma yellowish brown. Legs brown except tarsi, and apical and basal portions of tibiae yellow to
amber, pro- and metatibiae sometimes with more extensive pale colouration. Metasoma dark brown, terga and sterna with
apical margins translucent brownish yellow. Pubescence. Dull white. Moderately sparse. Head and mesosoma with moderately sparse woolly hairs (12 OD),
longest on genal beard, metanotum, and mesopleuron (22.5 OD). Paraocular area and gena with sparse subappressed
tomentum. Propodeum with moderately dense plumose hairs on lateral and posterior surfaces (22.5 OD). Metasomal
terga with moderately sparse, fine hairs. T1 acarinarial fan limited to small lateral area, dorsal opening wider than lateral
patches. T1T6 without tomentum. T2 apicolateral and T3T4 apical margins with sparse fringes. Surface sculpture. Face imbricate, punctation fine. Clypeus with apical half polished, punctation sparse (i=13d).
Supraclypeal area with punctation moderately sparse (i=12d). Lower paraocular area punctation dense (i≤d). Antennocular
area punctation moderately dense (i=11.5d). Upper paraocular area and frons punctate-reticulate. Ocellocular area
obscurely punctate (i=d). Gena obscurely lineolate. Postgena weakly imbricate. Mesoscutum weakly imbricate, punctation
moderately sparse between parapsidal lines (i=12.5d), dense laterad of parapsidal line (i≤d), contiguous on anterolateral
portion. Mesoscutellum similar to mesoscutum, submedial punctation sparse (i=1.53d). Axilla minutely punctate.
Metanotum imbricate. Preλpisternum rugulose. Hypoepimeral area imbricate-rugulose. Mesepisternum dorsal half rugulose,
ventral half ruguloso-imbricate. Metepisternum with upper half carinulate and ventral portion imbricate. Metapostnotum
incompletely carinulate, posterior margin imbricate. Propodeum with dorsolateral slope imbricate, lateral surface
tessellate-imbricate, posterior surface imbricate. Metasomal terga polished, punctation moderately dense basally (i=1
1.5d), more widely spaced apically (i=12.5d). Structure. Head very wide (length/width ratio = 0.940.96). Eyes convergent below (UOD/LOD ratio = 1.291.30).
Clypeus ½ below suborbital tangent, apicolateral angle convergent. Antennal sockets close (IAD/OAD < 0.5). Frontal
line carinate, ending 22.5 OD below median ocellus. Gena narrower than eye. Inner metatibial spur pectinate with 35
branches. Metapostnotum not truncate (MMR ratio = 1.001.14), posterior margin narrowly rounded onto posterior surface.
Propodeum with oblique carina absent, lateral carina not reaching dorsal margin. MALE. Similar to female except for the usual secondary sexual characters and as follows. Length 4.754.88 mm;
head length 1.451.48 mm; head width 1.50 mm; forewing length 4.134.19 mm. Colouration. Labrum, mandible, and distal margin of clypeus brownish yellow. Flagellum with ventral surface reddish
brown. Tegula brownish yellow. Legs brown, except tibiae mostly yellowish brown, tarsi pale brownish yellow. Pubescence. Face below eye emargination with moderately dense tomentum partially obscuring surface. Metasomal
sterna sparsely pubescent, S4S5 with apicolateral tufts (1.5 OD). Surface sculpture. Mesoscutum imbricate, punctation sparse between parapsidal lines (i=12.5d) and dense laterad
of parapsidal line (i≤1d). Metapostnotum with coarse longitudinal rugae, separated by wide smooth interstitial regions.
Propodeal dorsolateral slope coarsely rugose. T2 apical impressed area impunctate. Structure. Head wide (length/width ratio = 0.970.98). Eyes strongly convergent below (UOD/LOD ratio = 1.57
1.59). Clypeus 2/3 below suborbital tangent, apicolateral margins weakly convergent. Antennal sockets distant (IAD/
OAD > 1.5). Frontal line carinate, ending 1.5 OD below median ocellus. Pedicel shorter than F1. F2 length 1.9X F1. F2
F10 elongate (length/width ratio = 1.731.90). Metapostnotum moderately elongate (MMR ratio = 1.131.17), posterior
margin sharply angled onto posterior propodeal surface. Terminalia. Not examined.
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