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Lasioglossum sedi (Sandhouse, 1924)
Halictus (Chloralictus) sedi Sandhouse, 1924; Dialictus sedi (Sandhouse, 1924)

Life   Insecta   Hymenoptera   Apoidea   Halictidae   Lasioglossum
Subgenus: Dialictus

Lasioglossum sedi FEM mm x f
© Copyright Laurence Packer 2014 · 7
Lasioglossum sedi FEM mm x f

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Lasioglossum sedi MALE CFP comp
© Copyright Laurence Packer 2014 · 7
Lasioglossum sedi MALE CFP comp
Lasioglossum sedi, F, Back, UT, Garfield County
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Lasioglossum sedi, F, Back, UT, Garfield County

Lasioglossum sedi, F, Face, UT, Garfield County
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Lasioglossum sedi, F, Face, UT, Garfield County
Lasioglossum sedi, F, Side, UT, Garfield County
© Copyright source/photographer · 5
Lasioglossum sedi, F, Side, UT, Garfield County
Overview
Retrieved from: Gibbs, J. 2010. Revision of the metallic species of Lasioglossum (Dialictus)in Canada (Hymenoptera, Halictidae, Halictini). Zootaxa; 2591, 294-298


Halictus (Chloralictus) sedi Sandhouse, 1924: 12. ♀. Holotype. ♀ USA, Colorado, Boulder, 21.vi., on Sedum stenopetalum, (Cockerell); [NMNH: 26401]. Examined.


Taxonomy. Krombein, 1958: Lasioglossum (Chloralictus) sedi, p. 230 (catalogue, tax. status by Timberlake); Hurd, 1979: Dialictus sedi, p. 1971 (catalogue); Moure & Hurd, 1987: Dialictus sedi, p. 130 (catalogue).


Diagnosis. Females of L. sedi can be recognised by the diagnostic combination of a moderately elongate head (length/width ratio = 1.00–1.03), weakly lineolate gena, dense mesoscutal punctures except submedially (i=1–1.5d), minute mesepisternal punctures densely spaced (Fig. 35B), metapostnotum rugoso-striate except posterior margin smooth, T1 declivitous surface coriarious on ventral portion (Figs. 32B, 204D), and distinctly green metasomal terga. They are very similar to L. prasinogaster, L. sandhousiellum and the American species L. veganum (Cockerell). Female L. prasinogaster have very distinct and relatively strong mesepisternal punctures (Fig. 35A). Female L. sandhousiellum have the T1 declivitous surface polished on the ventral portion due to lack of microsculpture (Fig. 32A). Female L. veganum have the gena lineolate.


Males of L. sedi can be recognised by the moderately elongate head (length/width ratio = 0.99–1.00), facial tomentum limited to lower paraocular area, flagellomeres moderately short (length/width ratio = 1.27– 1.50) with the ventral surface brownish yellow, deep mesoscutal punctures moderately sparse on central disc (i=1–2d), hypoepimeral area and mesepisternum polished due to lack of microsculpture with deep punctures (i≤d), subhyaline wings with reddish brown pterostigma, tarsi brown, and metasomal terga distinctly punctate except apical impressed areas impunctate. They are similar to L. sandhousiellum and L. prasinogaster. Male L. sandhousiellum have pale brownish yellow tarsi and sparse punctures on posterior half of central disc (i=1– 4d). Male L. prasinogaster have more abundant pubescence on the face and mesosoma, hyaline wings with pale pterostigma and very dense mesepisternal punctures (i

Redescription. FEMALE. Length 5.00–5.37 mm; head length 1.42–1.61 mm; head width 1.39–1.58 mm; forewing length 3.90–4.21 mm.


Colouration. Head and mesosoma pale green with golden reflections. Clypeus with apical half blackish brown and basal half, and supraclypeal area bronze. Antenna dark brown, F2–F10 with ventral surface reddish brown to brownish yellow. Mesepisternum and metapostnotum sometimes bluish. Tegula reddish to translucent brownish yellow. Wing membrane subhyaline, venation and pterostigma pale brownish yellow. Legs brown, medio- and distitarsi reddish brown. Metasoma terga green, sterna brown, apical margins pale brownish red to pale translucent 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). Lower paraocular area and gena with subappressed pubescence partially obscuring surface. Metepisternum moderately obscured by tomentum. Propodeum with moderately dense plumose hairs on lateral and posterior surfaces (1.5–2 OD). Metasomal terga with moderately sparse, fine setae. T1 acarinarial fan weak, complete dorsally. T1 with tomentum dorsolaterallly. T2 basolaterally and T3–T5 entirely with tomentum partially obscuring surface. T2 apicolateral and T3–T4 apical margins with sparse fringes.


Surface sculpture. Face imbricate. Clypeus polished, punctation strong (i=1–3d). Supraclypeal area central portion polished, punctation sparse (i=1–3d). Lower paraocular and antennocular areas with punctation dense (i≤1d). Upper paraocular area and frons punctate-reticulate. Ocellocular area reticulate-punctate. Gena weakly lineolate-punctate. Postgena polished. Mesoscutum weakly imbricate, punctation fine, dense between parapsidal lines (i≤1d), moderately dense submedially (i=1–1.5d), very dense laterad and mesad of parapsidal lines (i

Structure. Head moderately elongate (length/width ratio = 1.00–1.03). Eyes weakly convergent below (UOD/LOD ratio = 1.08–1.12). Clypeus 3/4–4/5 projecting below suborbital line, apicolateral margins strongly convergent. Antennal sockets close (IAD/OAD ratio < 0.5). Frontal line carinate, ending 2 OD below median ocellus. OOD greater than IOD. Gena narrower than eye. Inner metatibial spur pectinate 3–4 with teeth. Metapostnotum moderately elongate (MMR ratio = 1.16–1.21), posterior margin rounded onto posterior surface. Propodeum with oblique carina virtually absent, lateral carina weak, reaching halfway to dorsal margin.


MALE. Similar to female except for the usual secondary sexual characters and as follows. Length 4.76– 5.00 mm; head length 1.44 mm; head width 1.44–1.45 mm; forewing length 3.60 mm.


Colouration. Flagellum with ventral surface reddish brown to brownish yellow.


Pubescence. Face below eye emargination clothed tomentum, not greatly obscuring surface. Lower paraocular with dense tomentum, obscuring surface. Gena with sparse tomentum. T2–T5 with sparse tomentum. S2–S3 with moderately sparse, erect hairs (1–1.5 OD), S2–S4 apicolateral margins with subappressed hairs.


Surface sculpture. Integument more polished. Mesoscutal punctation between parapsidal lines moderately sparse (i=1–2d). Mesepisternum polished, punctation distinct (i≤d). Propodeum with dorsolateral slope and lateral surface reticulate-punctate (i≤d). Metasomal terga punctation moderately dense (i=1–1.5d), apical impressed areas impunctate.


Structure. Head round (length/width ratio = 0.99–1.00). Eyes convergent below (UOD/LOD ratio = 1.24– 1.27). Clypeus projecting 2/3 below suborbital line, apicolateral margins convergent. Antennal sockets distant (IAD/AOD ratio = 1.0). OOD greater than IOD. Pedicel greater than F1. F2 length 1.4 F2–F10 moderately short (length/width ratio = 1.27–1.50), Metapostnotum truncate (MMR ratio = 1.44), posterior margin rounded onto posterior surface.


Terminalia. S7 with median lobe weakly clavate, apex rounded (Fig. 205F). S8 with apicomedial margin weakly convex (Fig. 205F). Genitalia as in Fig. 205D–E. Gonobase with ventral arms widely separated. Gonostylus small. Retrorse lobe elongate, attenuated apically.


Range. British Columbia southeast to Colorado (Fig. 206)


Additional material examined. CANADA: BRITISH COLUMBIA: 2♀♀ Okanagan-Similkameen Reg. Dist., Oliver, Ripley Lk., N49.2435 W119.6324, 925 m, 13.vii.2008 (L.R. Best); 1♀ Okanagan-Similkameen Reg. Dist., Summerland, Garnet Lk., N49.6879 W119.7761, 650 m, 18.vii.2008 (L.R. Best); USA: COLORADO: 5♀♀ Larimer Co., N40.6833 W105.3975, 11–12.v.2004 (S.W. Droege); 2♀♀ Jackson Co., N40.6017 W106.0726, 11–12.v.2004 (S.W. Droege); IDAHO:1♀ N44.39329 W111.38278, 2032 m, 23.vi.2007 (Gibbs & Sheffield); WASHINGTON: 1♀ Okanagan Co., 1.5 mi E Bailey, 11U N5373331 E346958, 28.vi.2004 (L. Wilson); 1♀ Okanagan Co., 1.5 mi E Bailey, 11U N5386972 E283581, 3.vii.2004 (J. Wilson); 1♀ Okanagan Co., 1 mi E Muckamuck Hill, 11U N5386867 E296155, 4.vii.2004 (J. Wilson & L. Wilson); [PCYU].


Floral records. CAMPANULACEAE: Campanula rotundifolia; CRASSULACEAE: Sedum stenopetalum; HYDROPHYLLACEAE: Phacelia leptosepala.


Comments. Common. First description of male.

Identification
Extracted from: Sandhouse G. A. New North American Species of Bees Belonging to the Genus Halictus (Chloralictus). No. 2532 - Proceedings U.S. National Museum. Vol. 65, Art. 19.

Female.—About 6 mm. long; dark greenish blue; pubescence dull white, rather sparse. Facial quadrangle longer than broad; sides of face, supraclypeal area, and upper portion of clypeus brassy green; front very closely punctured, the punctures becoming more scattered below; supraclypeal area and upper portion of clypeus with few deep punctures; lower part of clypeus black, without punctures; flagellum black, dark testaceous beneath. Mesothorax microscopically tessel- late, with delicate punctures; scutellum closely punctured, two pol- ished spots on the disk; disk of propodeum shining, with fine plicae on the lateral, and anastomosing rugae on the median portions, polished at the apex; mesopleurae indistinctly punctured; tegulae testa- ceous, impunctate; truncation well defined laterally. Abdomen obovate, polished, very delicately punctured, without distinct hair bands, but segments sparsely covered with hairs; apical margins of segments testaceous. Anterior wing about 4.5 mm. long; wings quite clear; stigma and nervures pale testaceous; second submarginal cell as broad as high, receiving the first recurrent nervure near the apex! almost equidistant with the third submarginal on marginal; subcostal nervure very dark. Legs dark with dull white pubescence; hind spur pectinate with four moderately long teeth.


Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Apiaceae  Cymopterus montanus @ RMBL_ENT (1)
Asteraceae  Erigeron speciosus @ BBSL (1)
Brassicaceae  Descurainia pinnata @ BBSL (1)

Physaria acutifolia @ BBSL (3)

Physaria sp @ BBSL (9); BBSL__CORNEL (1)
Campanulaceae  Campanula rotundifolia @ BBSL (1); RMBL_ENT (1)
Crassulaceae  Sedum lanceolatum @ BBSL (1)
Fabaceae  Astragalus osterhoutii @ BBSL (2)
Hydrophyllaceae  Phacelia argillacea @ BBSL (1)
Rosaceae  Potentilla gracilis @ RMBL_ENT (1)

Rosa nutkana @ BBSL (1)
Scrophulariaceae  Penstemon davidsonii @ BBSL (1)

Penstemon penlandii @ BBSL (4); BBSL__CORNEL (1)
_  Withheld @ BBSL (26); BBSL__ZION (6)

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Updated: 2024-03-28 08:58:50 gmt
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