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Identification Summary: L. tegulare look-alike; at this point may not be separable morphologically; mesepisternum smoother than L. tegulare but only with careful study can this be seen.
Retrieved from: Gibbs, J. 2010. Revision of the metallic species of Lasioglossum (Dialictus)in Canada (Hymenoptera, Halictidae, Halictini). Zootaxa; 2591, 120-124
Halictus (Chloralictus) ellisiae Sandhouse, 1924: 11. ♀.
Holotype. USA, Massachusetts, Forest Hills, 5.viii.1901, (W.M. Wheeler); [NMNH: 26400]. Examined.
Taxonomy. Michener, 1951: Lasioglossum (Chloralictus) ellisiae, p. 1113 (catalogue); Mitchell, 1960: Dialictus
tegularis ♀♂ (in part), p. 423 (redescription, synonymy); Gibbs, 2009: Lasioglossum (Dialictus) ellisiae
♀♂, p. 18 (redescription).
Diagnosis. See diagnosis for L. tegulare.
Redescription. FEMALE. Length 4.33–5.50 mm; head length 1.12–1.40 mm; head width 1.22–1.40 mm;
forewing length 2.87–3.70 mm.
Colouration. Head and mesosoma dull metallic bluish-green. Labrum sometimes reddish brown. Mandible
orange. Clypeus basally and supraclypeal area with golden reflections. Antenna dark brown, F8–F10 with
ventral surface reddish brown to yellowish brown. Mesoscutum with gold reflections. Tegula brown to black,
central area reddish. Legs dark brown, promedio- and prodistitarsi reddish, meso- and metadistitarsi reddish
brown. Wing membrane subhyaline, venation and pterostigma yellowish brown. Metasoma dark brown, terga
and sterna with apical margins reddish.
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). Propodeum with moderately dense
plumose hairs on lateral and posterior surfaces (2–2.5 OD). Metasoma terga with moderately sparse, fine setae. T1 acarinarial fan complete. T3–T5 ventrolateral reflexed areas with few, erect hairs (2.5–3 OD). T2–
T3 basolaterally and T4 entirely with sparse tomentum. T2 apicolateral and T3–T4 apical margins with sparse
fringes.
Surface sculpture. Face polished, weakly imbricate, punctation moderately strong. Clypeus polished basal
margin imbricate, punctation moderately dense (i=1–1.5d). Supraclypeal area punctation irregularly spaced
(i=1–4d). Lower paraocular area punctation dense (i
Structure. Head wide (length/width ratio = 0.92). Eyes convergent below (UOD/LOD ratio = 1.24–1.32).
Clypeus 1/2 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 with
posterior margin angled posteromedially (Fig. 7A). Inner metatibial spur pectinate with 3–4 teeth. Metapostnotum
moderately elongate (MMR ratio = 1.13–1.38), posterior margin weakly angled onto posterior surface.
Propodeum with oblique carina weak, lateral carina not reaching dorsal margin.
MALE. Similar to female except for the usual secondary sexual characters and as follows. Length 4.00–
4.64 mm; head length 1.20 mm; head width 1.22–1.30 mm; forewing length. 3.05 mm.
Colouration. Flagellum with ventral surface brown to reddish brown. Legs brown, medio- and distitarsi
brown.
Pubescence. Paraocular area and interantennal area with sparse, subappressed hairs. S4–S5 with moderately
dense, erect hairs.
Surface sculpture. Head and mesosoma polished, weakly imbricate. Clypeal punctation dense (i
Structure. Head moderately wide (length/width ratio = 0.98). Eyes strongly convergent below (UOD/LOD
ratio = 1.50–1.52). Antennal sockets distant (IAD/OAD > 1.0). Frontal line carinate, ending 1.5 OD below
median ocellus. Pedicel subequal to F1. F2 length 1.8–1.9X F1. F2–F10 moderately short (length/width ratio
= 1.40–1.50). Tegula enlarged, posterior margin not strongly angled. Metapostnotum truncate (MMR ratio =
1.31–1.47), posterior margin weakly angled onto posterior surface.
Terminalia. S7 with median lobe columnar, sides subparallel, apex rounded (Fig. 105F). S8 with apicomedial
margin weakly convex (Fig. 105G). Genitalia as in Fig. 105D–E. Gonobase with ventral arms narrowly
separated. Gonostylus small, dorsal setae elongate. Retrorse lobe elongate, weakly attenuated apically.
Range. Ontario and Massachusetts, west to Minnesota, and south along the Appalachian Mountains to
North Carolina (Fig. 103).
Additional material examined. CANADA: ONTARIO: 1♀ Haldimand-Norfolk Co., Nixon W Pr,
11.v.1998, H Douglas; 1♀ Haldimand-Norfolk Co., Nixon W Pr, 28.v.1998, (H. Douglas); 1♀ Norfolk Co.,
Pterophylla Plant Nursery, N42.384 W80.344, malaise trap, 13–22.viii.2006, (P.J. Carson); 1♀ Toronto, Ulster
St. parquette, N43.659 W79.413, x.2006, (J. Gibbs); 2♀♀ Toronto, York University, N43.775 W79.504,
24.v.2006, (J. Gibbs); [PCYU]; USA: ILLINOIS: 10♀♀ Algonquin, 16.vi.1909, (Nason); 2♀♀ Algonquin,
24.vi.1909, (Nason); 3♀♀ Bureau Co., 3mi NW of LaMoille, 13.v.1970, on Salix, (Laberge & Molina); 1♀
Champaign Co., Brownfield Woods, Urbana, 29–31.iii.1968, (Laberge & Ribble); [INHS]; 1♀ Kankakee Co.,Hooper Br, 2.vii.2003, (R.P. Jean); [PCYU]; 1♀ Lake Co., 2 mi NW Volo, 22.vi.1967, (Laberge & Ribble); 1♀
Long L., “bog, smtwd.” 11.viii.1906; 1♀ Mason Co., Bath, 2.vii.1968, (J.C. Marlin); 1♀ Mason State Forest,
2.vi.1966, (WJ Knee); 1♀ McHenry Co., Chain O’ Lakes St. Pk., 22.vi.1967, (Laberge & Ribble); 1♀ Whiteside
Co., Morrison, 10.vii.1968, (J.C. Marlin); 1♀ Woodford Co., 9mi N East Peoria, 7.viii.1968, (J.C. Marlin);
1♂, Macoupin Co., Plainview, 22.vii.1915; [INHS]; INDIANA: 1♀ Jackson Co., N38.88 W86.056,
26.vii.2003, (S.W. Droege); 2♀♀ Jasper Co., Nipsco, blue pan trap, 16.vii.2003, (R.P. Jean); [PCYU]; MASSACHUSETTS:
1♂, Franklin Co., 0.86mi SSW of W. Hawley, 19.vii.2006, (M.F. Veit); 1♀ Middlesex Co.,
0.2mi S of Townsend Gravel Pit, 27.v.2006, (M.F. Veit); 2♀♀ Middlesex Co., 0.1mi E of Airport, 29.iv.2006,
(M.F. Veit); [PCYU]; MICHIGAN: 1♀ Washtenau Co., Ann Arbor, ix.1976, (R.W. Carlson); [KUNHM];
MINNESOTA: 2♀♀ Clay Co., 3mi E & 2mi S of Felton, N47.047 W96.438, blue and yellow pan traps,21.vii.2006, (R.L. Andres); [PCYU]; NEW YORK: 1♂, Tompkins Co., Cornell U. campus, Ithaca,
22.vii.1971, (G. & K. Eickwort); 1♀ Cornell U. campus, Ithaca, 9.vii.1987; (G.C. Eickwort); 2♂♂, Tompkins
Co., Ithaca vicinity, inlet, 5.viii.1976, (G. & K. Eickwort); 1♀ Tompkins Co., Ithaca vicinity, inlet, 04.vi.1976,
(G. & K. Eickwort); 1♀ Tompkins Co., Ithaca vicinity, inlet, 14.vi.1976, (G. & K. Eickwort); 1♀ Tompkins
Co., Ithaca vicinity, inlet, 21.v.1984, (G. & K. Eickwort); 1♀ Tompkins Co., Ithaca vicinity, 21.v.1984, (G. &
K. Eickwort); 1♀ Otsego Co., East Worchester, 22.vi.1971, (G. & K. Eickwort); 1♀ Van Natta’s Dam, Ithaca,
23.v.1937, Babiy; 2 ♂, Van Natta’s Dam, Ithaca, 14.viii.1931, (P.P. Babiy); 1♂, Ithaca 10.viii.1916; 1♀ Ithaca,
22.vi.1936; 1♀ Ithaca, 2.v.1915; 1♀ Ithaca, 6.vii.1947, (C. Robinson); 1♂, Ithaca, 22.vi.1936; 1♀ Ithaca,
v.1913; 1♂, Ithaca, 20.vi.1962; 1♂, Otsego Co., East Worchester, 13.viii.1968, (G. & K. Eickwort); 1♀ Tompkins
Co., Ithaca, Monkey Run, 26.iv.1986, (G.C. Eickwort); 2♀♀ Tompkins Co., Monkey Run, 1.vi.1984, (B.
Alexander); 1♂, Tompkins Co., Michigan Hollow gravel pit, 5mi S of Danby, 7.ix.1968, (G. & K. Eickwort);
4♂♂, Tompkins Co., Buttermilk Falls S.P., Ithaca, 7.x.1967, (G. & K. Eickwort); 1♂, Tompkins Co.,
Taughannock Falls S.P., Ithaca, 7.x.1967, (G. & K. Eickwort); 1♀ Tompkins Co., Taughannock Falls S.P.,
Ithaca, 5.vi.1976, (G. & K. Eickwort); 1♂, Tompkins Co., 1mi S McLean, 23.vi.1975, (M.J. & C.A. Tauber); 4
♀ Ontario Co., Selkirk Shores S.P., 12.vi.1976, (G.C. Eickwort); 1♂, Tompkins Co., Dryden, 18.viii.1968, (G.
& K. Eickwort); 1♀ Tompkins Co., Robert H. Treman S.P., Ithaca, 14.viii.1971, (G. & K. Eickwort); 4♂♂,
Nassau Co., Hempstead Lake S.P., 4–6.vii.1974, (G.C. Eickwort); 1♂, Albany Co., 2mi NW Westerlo,
6.vii.1969, (G.C. Eickwort); 2♂♂, Schuyler Co., ear Reynoldsville, 17.vii.1976, (G.C. Eickwort); 1♀ Greene
Co., Stony Clove Creek, 42 8’00, 74 15’10, 412m, 28.vi.1978, (T.L. McCabe); 2 ♀ Cayuga Co., Fair Haven
Beach S.P., 27.v.1984, (G.C. Eickwort); 1♀ Seneca Co., Junius Ponds, 6mi NW Waterloo, 24.vi.1986, (G.C.
Eickwort); 1♀ Seneca Co., Junius Ponds, 6mi NW Waterloo, 12.viii.1986, (G.C. Eickwort); 1♀ NY, Tompkins
Co. 6-mile creek, SE. Ithaca Reservoir, 25.v.1968, (G. & K. Eickwort); [CUIC]; NORTH CAROLINA: 1♂,
Great Smoky Mountain National Park, Cataloochee overlook, N35.54 W83.06, 6.viii.2006, (J. Gibbs);
[GSNP]; 1♀ S. of Bryson City, Bryson City Rd. & Queen Branch Rd., N35.284 W83.487, 8.viii.06, (J.
Gibbs); [PCYU]; PENNSYLVANIA: 1♀ Stroud Co., Stroudsburg, 14.vii.1976, (R.J. Pollack); 1♂, Lehigh
Gap River, 19.vii.1903, (J.C. Bradley); 1♂, Roberts, viii.1905, (J.C. Bradley); [CUIC]; WISCONSIN: 1♀
Sauk Co., Spring Green Preserve, N43.19785 W90.05904, 23.vii.2006, (A. Wolf); [UWGB].
Floral records. The floral records reported for L. tegulare are likely attributable, in part, to L. ellisiae.
Comments. Common. This species was once considered a synonym of L. tegulare (Mitchell 1960) but
was recently resurrected by Gibbs (2009).
Extracted from Jason Gibbs. 2011. Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini.) Zootaxa.
Lasioglossum (Dialictus) ellisiae (Sandhouse)
Halictus (Chloralictus) ellisiae Sandhouse, 1924: 11. ♀.
Holotype. USA, Massachusetts, Forest Hills, 5.viii.1901, (W.M. Wheeler); [NMNH: 26400]. Examined.
Taxonomy. Michener, 1951: Lasioglossum (Chloralictus) ellisiae, p. 1113 (catalogue); Mitchell, 1960: Dialictus tegularis
♀♂ (in part), p. 423 (redescription, key, synonymy); Gibbs, 2009a: Lasioglossum (Dialictus) ellisiae ♀♂, p. 18 (redescription);
Gibbs, 2010b: Lasioglossum (Dialictus) ellisiae ♀♂, p. 120 (redescription, key).
Diagnosis. Female L. ellisiae can be recognised by the following diagnostic combination: tegula enlarged, strongly
punctate with distinct posterior angle (Fig. 7A), and mesepisternal punctures separated by smooth interspaces with very
little microsculpture. They are most similar to L. tegulare, which has strong microsculpture between the mesepisternal
punctures.
Male L. ellisiae also have an enlarged tegula (Fig. 7A) and can be distinguished from similar species by sparse punctation
on T2 immediately basal of premarginal line (Fig. 38B). They are most similar to L. tegulare, which has uniformly
dense punctures on T2 basal of premarginal line.
Range. Ontario and Massachusetts, west to Minnesota, and south along the Appalachian Mountains to North
Carolina. USA: IL, IN, MA, ME, MI, MN, NC, NY, PA, WI. CANADA: ON.
DNA Barcode. Available. Multiple sequences.
Comments. Common. Until recently, L. ellisiae was considered a synonym of L. tegulare (Gibbs 2009a, see also
Gibbs 2010b). For a complete treatment of L. ellisiae and related species in eastern North America see Gibbs (2009a).
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