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Lasioglossum novascotiae (Mitchell, 1960)
Dialictus novascotiae Mitchell, 1960

Life   Insecta   Hymenoptera   Apoidea   Halictidae   Lasioglossum
Subgenus: Dialictus

Lasioglossum novascotiae FEM CFP-
© Copyright Laurence Packer 2014 · 7
Lasioglossum novascotiae FEM CFP-

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Lasioglossum novascotiae MALE mm .x ZS PMax
© Copyright Laurence Packer 2014 · 7
Lasioglossum novascotiae MALE mm .x ZS PMax
Lasioglossum novascotiae, Barcode of Life Data Systems
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Lasioglossum novascotiae, female, pronotal lateral angle obtuse
© USDA Bee Biology and Systematics Laboratory, Logan Utah · 1
Lasioglossum novascotiae, female, pronotal lateral angle obtuse

Identification Summary: Large; blue thorax; northern in distribution; abdomen very dark and with either no appressed hairs or only a scattered few; pits on scutum widely spaced; T1 hair fan open at the top.

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 7 mm.; head and thorax dark bluish-green, dorsum of thorax more or less purplish, abdominal terga more piceous, with reddish reflections; pubescence short, thin, entirely pale, apical abdominal segments to some degree tomentose; length and breadth of head subequal; clypeus protruding somewhat more than one-half below suborbital line; supra— clypeal area only slightly shorter than clypeus; eyes convergent below; lateral ocelli very slightly nearer eyes than to each other; cheeks subequal to eyes in width; punctures on upper part of face very deep, distinct and close but rather fine, becoming somewhat more sparse toward level of antennae, those on supraclypeal area quite close and rather fine, those on upper margin of clypeus very fine and close but becoming coarse, deep and sparse toward apical margin; vertex somewhat shining, punctures very obscure or lacking, upper part of cheeks somewhat shining, without distinct punctures, becoming very finely and obscurely substriate below; hypostomal carinae parallel, narrowly rounded at outer angle, surface on each side shining; dorsum of thorax smooth but rather dull, punctures uniformly sparse, even between notaulices and tegulae (quite similar to lineatulus, fig. 99), punctures on scutellum extremely minute and indefinite along a deeply grooved midline, very sparse on each side of this; pleura somewhat rugose anteriorly, becoming somewhat more shining but finely roughened posteriorly, without distinct punctures; dorsal area of propodeum rather coarsely and sparsely striate, median striations fully attaining a rather abrupt posterior margin, lateral faces quite smooth, more or less shining; wings subhyaline, veins and stigma pale testaceous, 2nd submarginal cell shorter than 3rd, receiving 1st recurrent vein nearly at apex; tegulae testaceous-hyaline; legs dark, rather piceous at base, becoming somewhat reddened toward apical tarsal segments; abdominal terga somewhat shining, punctures exceedingly minute, hardly evident even with high magnification, apical impressed areas entirely impunctate, somewhat yellowish, becoming quite definitely yellow along rims, discal pubescence very sparse and thin on terga 1-3, 4 with some rather dense, appressed tomentum which partially obscures the surface.

TYPE — Holotype: Female, Baddeck, Nova Scotia, Aug. 27, 1926 (W. M. Wheeler) [M. C. Z.].
Retrieved from: Gibbs, J. 2010. Revision of the metallic species of Lasioglossum (Dialictus)in Canada (Hymenoptera, Halictidae, Halictini). Zootaxa; 2591, 207-211

Dialictus novascotiae Mitchell, 1960: 407. ♀. Holotype. ♀ Canada, Nova Scotia, Baddeck, 27.viii.1926, [NCSU]. Examined.

Taxonomy. Knerer & Atwood, 1964: Dialictus novascotiae ♂, p. 5 (description); Krombein, 1967: Lasioglossum (Dialictus) novascotiae, p. 464 (catalogue); Hurd, 1979: Dialictus novascotiae, p. 1968 (catalogue); Moure & Hurd, 1987: Dialictus novascotiae, p. 115 (catalogue).

Diagnosis. See diagnosis for L. lineatulum.

Redescription. FEMALE. Length 5.80–6.95 mm; head length 1.70–1.73 mm; head width 1.78–1.82 mm; forewing length 4.58–4.94 mm.

Colouration. Head and mesosoma greenish blue. Clypeus with apical 2/3 blackish brown and basal portion brassy. Supraclypeal area pale green. Antenna dark brown, flagellum with ventral surface reddish brown. Tegula dark reddish brown. Wing membrane subhyaline, venation and pterostigma yellowish brown. Legs brown, medio- and distitarsi reddish brown. Metasoma blackish brown, terga and sterna with apical margins reddish brown.

Pubescence. Dull white. Moderately sparse. Head and mesosoma with moderately sparse woolly hairs (1– 1.5 OD), longest on genal beard, metanotum and mesopleuron (2–2.5 OD). Lower paraocular area and gena without subappressed tomentum. Propodeum with moderately dense plumose hairs on lateral and posterior surfaces (2–2.5 OD). Metasomal terga with sparse, fine setae. T1 acarinarial fan incomplete. T2–T3 basolaterally and T4 with at most sparse tomentum.

Surface sculpture. Face imbricate. Clypeus apical half polished with sparse punctation (i=1–3d). Supraclypeal area with punctation moderately dense (i=1–1.5d). Lower paraocular and antennocular areas with punctation moderately dense (i=1–1.5d). Upper paraocular area and frons punctate-reticulate. Ocellocular area obscurely punctate (i=d). Gena lineolate. Postgena weakly lineolate. Mesoscutum weakly imbricate, punctation between parapsidal lines sparse (i=1–4d), moderately sparse laterad of parapsidal lines (i=1–2.5d),

contiguous on anterolateral portions. Mesoscutellum sparsely punctate. Axilla punctate. Metanotum imbricate. Preëpisternum rugose. Hypoepimeral area imbricate. Mesepisternum weakly rugose dorsally, rugulose ventrally. Metepisternum with dorsal half rugoso-striate, ventral half imbricate. Metapostnotum completely rugoso-striate. Propodeum with dorsolateral slope rugulose, lateral surface rugulose above, imbricate below, posterior surface imbricate. Metasomal terga faintly coriarious, punctation on basal halves moderately dense (i=1–1.5d), apical halves impunctate.

Structure. Head wide (length/width ratio = 0.95–0.96). Eyes convergent below (UOD/LOD = 1.16–1.20). Clypeus ½ below suborbital tangent, apicolateral margins convergent. Antennal sockets close (IAD/OAD < 0.5). Frontal line carinate, ending 2.5 OD below median ocellus. Gena narrower than eye. Inner metatibial spur pectinate with 3–5 teeth. Metapostnotum moderately elongate (MMR ratio = 1.24), posterior margin narrowly rounded onto posterior surface. Propodeum with oblique carina weak, lateral carina incomplete, not reaching dorsal margin..

MALE. Similar to female except for the usual secondary sexual characters and as follows. Length 6.40– 7.22 mm; head length 1.61–1.75 mm; head width 1.60–1.73 mm; forewing length 4.33–4.76 mm

Colouration. Head and mesosoma bluish green. Flagellum with ventral surface reddish to brownish yellow. Tarsi brownish yellow.

Pubescence. Face below eye emargination with moderately dense tomentum, partially obscuring surface. Lower paraocular area with dense tomentum. S3 apicolateral portion and S4–S5 lateral portions with subappressed plumose hairs (1–1.5 OD).

Surface sculpture. Postgena lineolate. Metanotum rugulose. Metapostnotum striate. Propodeum with dorsolateral slope and lateral and posterior surfaces rugose. T2–T4 punctation uniform on basal halves (i=1.5– 2d), apical half impunctate (except along premarginal line).

Structure. Head moderately elongate (length/width ratio = 1.00–1.04). Eyes strongly convergent below (UOD/LOD = 1.48–1.50). Antennal sockets distant (IAD/OAD >1.2). Frontal line carinate, ending 2 OD below median ocellus. Pedicel less than F1. F2 length 1.6–1.7X F1. F2–F10 elongate (length/width ratio = 1.57–1.86). Metapostnotum moderately elongate (MMR ratio = 1.15–1.36), posterior margin sharply angled onto posterior surface.

Terminalia. S7 with median lobe narrowly, weakly clavate, apex rounded (Fig. 154F). S8 with apicomedial margin weakly convex (Fig. 154F). Genitalia as in Fig. 154D–E. Gonobase with ventral arms widely separated. Gonostylus small, dorsal setae elongate. Retrorse lobes narrow, weakly attenuated apically.

Range. Nova Scotia west to British Columbia (Fig. 155).

Additional material examined. CANADA: ALBERTA: 1♀ Writing-On-Stone P.P., Sedge-South, 12– 20.vi.1990 (D. McCorquodale); [PMAE]; BRITISH COLUMBIA: 1♀ 17.vii.2002; 1♀ 6.vii.2002; 1♀ 5.vii.2002; [PCYU]; NEW BRUNSWICK: 1♀ Tabusintac, 17.vi.1937 (J.W. Cadbury); [ANSP]; NORTHWEST TERRITORIES: 1♀ 1906 [CNC]; 2♂♂ Mackenzie Dist., Norman Wells, N65°15′15′′ W126°41′15′′, 22.viii–1.ix.2005 (D. Currie & R. Popko); [ROM]; NOVA SCOTIA: 1♀ Kings Co., Wst. Blk. Rck., N45.1296 W064.7383, 19.ix.2001 (C. Sheffield); 8♀♀1♂ Sable Island, N43.9319 W059.9985, 8.viii.2008 (P.M. Catling); [PCYU]; ONTARIO: 3♂♂ Hearst, 13.viii.1962 (G. Knerer); 1♀2♂♂ Upsala, 14.viii.1962 (G. Knerer); [ROM]; 1♀ Metcalf, 29.vii.1983 (B.E. Cooper); [PMAE]; PRINCE EDWARD ISLAND: 1♀ Queens Co., 7.vii.2006, 9:05h–9:35h (V. MacPhail); 1♀ Queens Co., 15.vii.2006, 9:35h–9:50h (V. MacPhail); [PCYU]; SASKATCHEWAN: 4♂♂ Sask. Landing, 23.vii.1956 (O. Peck); [CNC]; USA: MICHIGAN: 1♀ Saugatuck, 19.v.2004 (J. Tuell); [ARC].

Floral records. ASTERACEAE: Achillea, Anaphalis, Aster, Solidago, ONAGRACEAE: Epilobium, Oenothera, ROSACEAE: Fragaria, SALICACEAE: Salix.

Comments. Uncommon. This evidently a boreal species and one of two Lasioglossum species collected on Sable Island, Nova Scotia (see L. sablense below).

Extracted from Jason Gibbs. 2011. Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini.) Zootaxa.

Lasioglossum (Dialictus) novascotiae (Mitchell)

Dialictus novascotiae Mitchell, 1960: 407. ♀.

Holotype. ♀ Canada, Nova Scotia, Baddeck, 27.viii.1926, [NCSU]. Examined.

Taxonomy. Knerer & Atwood, 1964: Dialictus novascotiae ♂, p. 5 (description); Krombein, 1967: Lasioglossum (Dialictus) novascotiae, p. 464 (catalogue); Hurd, 1979: Dialictus novascotiae, p. 1968 (catalogue); Moure & Hurd, 1987: Dialictus novascotiae, p. 115 (catalogue); Gibbs, 2010b: Lasioglossum (Dialictus) novascotiae ♀♂, p. 207 (redescription, key).

Diagnosis. Female L. novascotiae can be recognised by the following diagnostic combination: head wide (length/ width ratio = 0.95–0.96), clypeus strongly protruding below suborbital tangent, mesoscutal punctures sparse throughout, mesepisternum rugulose, propodeum with dorsolateral slope rugulose (Fig. 27B), and metasomal terga blackish brown. They are most similar to L. lineatulum, which has head wider (length/width ratio = 0.92–0.93), propodeum with dorsolateral slope smooth (Fig. 27A), and metasomal terga with metallic reflections.

Male L. novascotiae can be recognised by the following diagnostic combination: mesoscutal punctures sparse throughout, mesepisternum rugulose, and metasomal sterna with subappressed plumose hairs limited to apicolateral portions of S3 and lateral portions of S4–S5. They are similar to L. lineatulum, which has dense plumose hairs on S2–S4 and S5 laterally. Lasioglossum achilleae is similar but has a shorter head and sparse punctation on metasomal terga.

Range. Nova Scotia west to Alaska, south to Michigan. USA: AK, ME, MI. CANADA: AB, BC, NB, NS, NT, ON, PE, SK.

DNA Barcode. Available. Multiple sequences.

Comments. Common in some localities.

Scientific source:

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FamilyScientific name @ source (records)
Asteraceae  Solidago @ CUIC_ENT (2)

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Updated: 2019-11-20 14:27:02 gmt
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