Revision of the metallic species of Lasioglossum (Dialictus) in Canada (Hymenoptera, Halictidae, Halictini) 2591 Gibbs, Jason Zootaxa 2010 2010-08-31 2591 1 1 382 Gibbs Gibbs 2010 [151,638,158,184] Insecta Halictidae Lasioglossum Animalia Hymenoptera 73 74 Arthropoda species atwoodi sp. nov. Dialictus  ( Figure 76A–E)     Holotype. ♀ CANADA, Ontario, Algonquin P.P., Madawaska Lake,  7–19.vi.2007( E. Proctor); [ PCYU].   Diagnosis.Females of  L. atwoodican be recognised by the diagnostic combination of round head (length/ width ratio = 0.96–0.98), tessellate-imbricate mesoscutum with moderately coarse punctures that are moderately sparse on central disc (i=1–2d), reddish brown tegula, strongly rugose mesepisternum ( Fig. 18A), metapostnotum rugoso-striate but not reaching the posterior margin, T1 acarinarial fan with dorsal opening, brown metasomal terga with the apical halves obscurely punctate, and T4 with scattered tomentum not obscuring surface. They are most similar to  L. viridatumwhich have the metapostnotal rugae reaching the posterior margin and T4 with sparse tomentum partially obscuring surface. Male unknown.   Description.FEMALE. Length 5.12–5.67 mm; head length 1.45–1.52 mm; head width 1.51–1.58 mm; forewing length 3.97–4.03 mm.  Colouration.Head and mesosoma blue with greenish reflections. Clypeus with apical half blackish brown and basal half, and supraclypeal area greenish. Antenna dark brown, F8–F10 with ventral surface brownish yellow. Tegula reddish brown. Wing membrane subhyaline, venation and pterostigma yellowish brown. Legs brown, medio- and distitarsi reddish brown. Metasoma dark brown, terga and sterna with apical margins reddish brown to translucent yellowish brown.  Pubescence.Dull white. 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 with sparse subappressed, plumose hairs, not obscuring surface. Propodeum with moderately dense plumose hairs on lateral and posterior surfaces (2–2.5 OD). Metanotum anteromedial portion with dense tomentum. Metasomal terga with extremely sparse, fine setae. T1 acarinarial fan with wide dorsal opening, equal to width of lateral hair patches. T2–T3 basolaterally and T4 entirely with sparse, scattered tomentum. T2 apicolateral and T3–T4 apical margins with sparse fringes.  Surface sculpture.Face imbricate, punctation moderately strong. Clypeus with apical half polished, punctation sparse (i=1–3d). Supraclypeal area with punctation sparse (i=1–4d). Lower paraocular and antennocular areas punctation moderately dense (i=1–1.5d). Upper paraocular area and frons reticulate-punctate. Ocellocular area obscurely punctate (i≤d). Gena lineolate, punctation obscure. Postgena imbricate. Mesoscutum and mesoscutellum tessellate-imbricate, punctation moderately coarse and deep, moderately sparse between parapsidal lines (i=1–3d), moderately dense laterad of parapsidal line (i=0.5–1.5d), and dense on anterolateral portions (i≤d). Mesoscutellum similar to mesoscutum, submedial punctation sparse (i=2–5d). Metanotum ruguloso-imbricate. Preëpisternum rugose. Hypoepimeral area ruguloso-imbricate. Mesepisternum rugose. Metapostnotum longitudinally rugoso-striate, posterior margin imbricate. Propodeum with dorsolateral slope rugulose to imbricate, lateral surface rugoso-imbricate, posterior surface tessellate. Metasomal terga polished except T1 declivitous surface and apical margins weakly coriarious, punctation on basal halves moderately dense (i=2–3d), obscure on apical halves (i=2–4d).  Structure.Head moderately wide (length/width ratio = 0.96–0.98). Eyes convergent below (UOD/LOD ratio = 1.18–1.28). Clypeus ½ below suborbital tangent, apicolateral margins strongly convergent. Antennal sockets close (IAD/OAD <0.5). Frontal line carinate, ending <2 OD below median ocellus. Gena narrower than eye. Inner metatibial spur pectinate with teeth. Metapostnotum moderately elongate (MMR ratio = 1.13– 1.19), posterior margin weakly angled onto posterior surface. Propodeum with oblique carina weak, lateral carina weak, nearly reaching dorsal margin. MALE. Unknown.  Range. Nova Scotiawest to Wisconsin, south to North Carolina( Fig. 75).   FIGURE 76.  Lasioglossum atwoodi new species. Female (A) lateral habitus; (B) dorsal habitus; (C) face; (D) mesepisternum; (E) metapostnotum. Scale bars, A–C = 1 mm.    Paratypes. CANADA: NOVA SCOTIA: 1♀ Hants Co., Upper Rawdon, N45.0845 W063.7297,  10.vii.2003(Sheffield, Rigby& Jansen);  ONTARIO: 1♀topotypical,  7–19.vi.2007( E. Proctor);  1♀ York University, near Boyerwoodlot,  12.vii.2005( E. Willis); [ PCYU];   USA: INDIANA: 1♀ LaPorte Co., Indiana DunesN.L., Beverly Shores, N41°42´17´´ W086°56´03´´,  14.iv.2004( R. Grundel); [ IDNL];  MARYLAND: 1♀ Pr. George’s Co., N38.8987 W076.6783,  7.vii.2001( S.W. Droege);  MICHIGAN: 3♀ Van Buren Co., S. Haven E of Sandbar,  6.v.2001( L. Packer);  NEW YORK: 1♀ Hwy63, N of Genesio, N42.8235 W077.1131,  11.vi.2006( J. Gibbs); [ PCYU];  NORTH CAROLINA: 1♀  11 miE of Cashiers,  12.vii.1957( J.G. Chillcott); [ CNC];  WISCONSIN: 1♀ Brown Co., 3489 Yorkshire Dr., N44.54414 W087.9071,  25.v.2005( A. Wolf);  1♀ Brown Co., 3489 Yorkshire Dr., N44.54414 W087.9071,  5.vi.2005( A. Wolf); [ PCYU];  1♀ Kawaunee Co., They’s Ag, N44.53102 W87.70013,  23.v.2006( J. Watson); [ ARC].   Etymology.The specific epithet is in honour of the late Canadian entomologist Carl Edmund Atwood. Floral records. PRIMULACEAE:  Lysimachia terrestris, ROSACEAE:  Rubus.   Comments.Uncommon. [151,1272,277,301] 2007-06-07 2007-06-19 2007-06-07 PCYU Algonquin P. P. & E. Proctor Canada Madawaska Lake 73 74 1 1 Ontario holotype 2003-07-10 Rigby & Jansen Canada Hants Co. 45.0845 Upper Rawdon 6 -63.7297 74 75 1 1 Nova Scotia paratype [632,1266,1680,1706] 2007-06-07 2007-06-19 2007-06-07 E. Proctor Canada ONTARIO 74 75 1 1 Ontario paratype 2005-07-12 PCYU E. Willis Canada Boyer York University 74 75 1 1 Ontario paratype 2004-04-14 R, IDNL Grundel United States of America LaPorte Co. 41.704723 Beverly Shores 19 -86.934166 Indiana Dunes 74 75 1 1 Indiana paratype 2001-07-07 S. W. Droege United States of America Pr. George's Co. 38.8987 Pr. George's Co. 6 -76.6783 74 75 1 1 Maryland paratype 2001-05-06 L. Packer United States of America Van Buren Co. Haven 74 75 3 3 Michigan paratype 2006-06-11 PCYU J. Gibbs United States of America 42.8235 Hwy 6 -77.1131 74 75 1 1 New York paratype 1957-07-12 CNC J. G. Chillcott United States of America 11 mi E of Cashiers 74 75 1 1 North Carolina paratype [247,1389,1920,1946] 2005-05-25 A. Wolf United States of America Brown Co. 44.54414 Yorkshire Dr. 4 -87.9071 74 75 1 1 Wisconsin paratype 2005-06-05 PCYU A. Wolf United States of America Brown Co. 44.54414 Yorkshire Dr. 4 -87.9071 74 75 1 1 Wisconsin paratype 2006-05-23 ARC J. Watson United States of America Kawaunee Co. 44.53102 They's Ag 1 -87.70013 74 75 1 1 Wisconsin paratype