Lasioglossum (Hemihalictus) pectorale ( Smith 1853 )

Gibbs, Jason, Packer, Laurence, Dumesh, Sheila & Danforth, Bryan N., 2013, Revision and reclassification of <i> Lasioglossum </ i> (<i> Evylaeus </ i>), <i> L. </ i> (<i> Hemihalictus </ i>) and <i> L. </ i> (<i> Sphecodogastra </ i>) in eastern North America (Hymenoptera: Apoidea: Halictidae), Zootaxa 3672 (1), pp. 1-116 : 52-54

Lasioglossum (Hemihalictus) pectorale ( Smith 1853)

( Figs. 4I , 5I , 6I , 7I , 8I , 33 , 34 , 76C )

Halictus pectoralis Smith 1853, p. 68

Holotype. ♀ USA, Florida, Duval Co., Jacksonville, St. John’s Bluff (E. Doubleday) [ BMNH]

(Locality label reads “E. Doubleday, St. John’s Bluff, E. Florida ”).

Evylaeus pectoralis (in Mitchell 1960: redescription, key ♂; Hurd 1979: catalogue; Moure & Hurd 1987: catalogue) Halictus (Evylaeus) pectoralis (in Viereck 1916: catalogue)

Lasioglossum (Evylaeus) pectorale (in Michener 1951: catalogue)

Diagnosis. Both sexes of L. pectorale can be recognised by the combination of mesepisternum coarsely rugose throughout ( Fig. 76C ) and mesoscutum with distinct, coarse punctation throughout. Lasioglossum nelumbonis have similar sculpture on the mesepisternum but are easily distinguished by rugose anterolateral portion of the mesoscutum and distinctive propodeal pubescence ( Fig. 75A ). Both L. cinctipes and L. truncatum have less rugose sculpture on the posterior portion of the mesepisternum (as in 76F), wider heads ( Figs. 43A, 43I ) and fine mesoscutal punctation.

The black colouration and coarse sculpturing of the subgenus L. (Leuchalictus) may cause small individuals of L. leucozonium or L. zonulum to be mistaken for L. pectorale . Female L. (Leuchalictus) have vein 1rs-m strong and inner metatibial spurs denticulate, with short teeth. Female L. pectorale have pectinate inner metatibial spurs ( Fig. 5I ). Male L. zonulum and L. leucozonium have yellow on the clypeus and distinct features of metasomal S6, either a V-shaped hair pattern in L. leucozonium or distinctive medial hair tufts in L. zonulum . Male L. pectorale have the clypeus entirely black ( Fig. 6I ) and lack distinctive hairs on S6.

Redescription. FEMALE. Length 5.3–6.7 mm. Head length 1.47–1.73 mm. Head width 1.52–1.80 mm. Wing length 3.6–4.4 mm. (n=10)

Colour. Head and mesosoma black. Antenna black-brown, except ventral surface of flagellum reddish brown. Tegula dark reddish brown. Legs dark brown, except medio- and distitarsi reddish brown. Wing membrane hyaline, faintly dusky. Pterostigma reddish brown. Metasomal terga black-brown, apical margins pale brown.

Structure. Head round (L/W ratio = 0.96–1.01). Clypeus 2/3–3/4 below suborbital line. Eyes convergent below (UOD:LOD = 1.22–1.28). Gena narrower than eye. Ocelli normal. Pronotum smoothly rounded. Protibial spur with serrations as long as width of malus. Inner metatibial spur pectinate, teeth 4–5, basal teeth longer than width of rachis. Metapostnotum carinate on posterior margin. Propodeal lateral carina reaching dorsolateral slope, oblique carina high.

Surface sculpture. Supraclypeal area weakly polished medially, punctures sparse (i=1–1.5d). Gena and postgena carinulate. Mesoscutum polished-weakly imbricate; punctures coarse, contiguous laterally (i<d) but clearly separated between parapsidal lines (i=1–1.5d). Mesepisternum coarsely rugose. Metapostnotum coarsely rugose. Propodeum rugose laterally, smooth on posterior surface. Metasomal terga polished; punctures present throughout, except T1–T2 apical impressed areas impunctate medially.

Pubescence. Head and mesosoma with sparse plumose hairs. Metafemoral scopa with dense plumose hairs. Propodeum with sparse plumose hairs. Metasomal terga with apical fimbriae sparse. T1 with erect plumose hairs. T2–T3 with basolateral tomentum. Metasomal sterna with plumose scopa.

MALE. Length 5.0– 5.4 mm. Head length 1.34–1.60 mm. Head width 1.34–1.56 mm. Wing length 3.6–4.1 mm. (n=5)

Colour. Head and mesosoma black. Antenna black, except ventral surface of flagellum reddish brown. Legs dark brown, except medio- and distitarsi reddish brown. Tegula dark reddish brown. Wing membrane hyaline. Pterostigma reddish brown. Metasomal terga dark brown, apical margins reddish brown.

Structure. Head long (L/W ratio = 1.00–1.03). Mandible short, reaching opposing clypeal angle. Flagellomeres short, F2 subequal to F1, much shorter than scape. Eyes strongly convergent below (UOD:LOD = 1.31–1.48). Gena narrower than eye. Pronotum smoothly rounded. Metapostnotum posterior margin carinate. Propodeal lateral carina not reaching dorsolateral slope.

Surface sculpture. Supraclypeal area weakly imbricate, punctures relatively dense (i=1–1.5d). Gena and postgena lineolate. Mesoscutum polished; punctures dense laterally (i≤d), distinctly separated medially (i=1–1.d). Mesepisternum coarsely rugose. Metapostnotum carinate-rugose, apical margin separated from posterior surface by carina. Propodeum rugose. Metasomal terga polished, punctures distinct throughout.

Pubescence. Head and mesosoma with sparse plumose hairs. Lower paraocular area with sparse tomentum. Propodeum covered with sparse tomentum. Metasomal terga nearly bare, apical fimbriae extremely sparse. T2–T3 with very sparse basolateral tomentum. Metasomal sterna with sparse, plumose hairs (1.5–2 OD).

Terminalia . As shown in Figs. 7I , 8I . Gonostylus small, with short setae. Retrorse lobe long, broad, attenuated apically.

Taxonomic notes. Lasioglossum pectorale belongs to the “carinaless Evylaeus ” group; however, L. pectorale is very coarsely sculptured, which causes the propodeum to appear to have stronger carinae than most “carinate Evylaeus ”. Molecular phylogenetic studies place L. pectorale in a clade including L. (Hemihalictus) lustrans ( Danforth et al. 2003; Gibbs et al. 2012b), which has very different sculpturing.

A related species, L. pectoraloides ( Cockerell 1895) , occurs further to the west. It can be easily distinguished based on morphology, but DNA barcodes are nearly identical. Only by examining patterns of polymorphism can DNA barcodes of the two species be separated (see below).

Biology. This species is polylectic ( Moure & Hurd 1987). There are no published records of its nesting biology or social level, but it is believed to be a solitary ground-nester, based on its phylogenetic affinities ( Danforth et al. 2003; Gibbs et al. 2012a, b).

DNA barcodes. Twenty-five specimens sequenced (maximum intraspecific p-distance: 2.3%). The minimum interspecific p-distance from L. pectorale and L. nelumbonis is 4.2%. Twenty-five fixed differences separate L. pectorale from L. nelumbonis . One fixed substitution distinguishes L. pectorale from all other species included herein: 438(C) (see Table 2). The related species L. pectoraloides cannot be distinguished from L. pectorale based on a single fixed difference, however, each species has unique patterns of polymorphism that allow them to be differentiated using DNA barcodes.

Lasioglossum pectorale displays phylogeographic structure in its co1 haplotypes. Northern populations (Manitoba, Nova Scotia, and Ontario) differ by 3 fixed differences from more southern populations (e. g., Florida, North Carolina, New York) with co-occurrence of the two haplotypes in southern Ontario. These three positions allow discrimination of the northern and southern populations and L. pectoraloides as follows: 190(T, A/G, T), 197(C, T, T), 554(A, G, G), where the bases are ordered northern L. pectorale , southern L. pectorale , and L. pectoraloides , respectively. Additional study of L. pectorale phylogeography would be of interest.

Range. Fig. 35 .

Material examined. 2582 (2315 females, 267 males). Deposited in ABS, ANSP, BBSL, CAS, CMNH, CNC, CSCA, CTMI, CUIC, EMEC, IRCW, LACM, MCPM, MCZ, MSUC, PCYU, PMAE, PMNH , ROMent, UCFC, UCMC, and UCRC.

CANADA. MANITOBA: Division No. 5: Hilton, 6 mi. S; Division No. 6: Oak Lake; Division No. 7: Aweme; Carberry; Shilo, 5 mi. SW; Division No. 9: Delta ; NOVA SCOTIA: Kings Co.: Canard; Kentville; ONTARIO: Chatham-Kent Div.: Thamesville; Durham Co.: Kendal; Elgin Co.: Iona; Haliburton Co.: Minden; Hastings Co.: Marmora; Leeds and Grenville United Cos.: St. Lawrence Is. N.P.; Middlesex Co.: Strathroy; Muskoka Dist.: Dorset; Muskoka; National Capital Reg.: Constance Bay; Ottawa; Niagara Reg.: Grimsby; Jordan; Oxford Co.: Tillsonburg; Toronto Dist.: Toronto; Wellington Co.: Guelph; PRINCE EDWARD ISLAND; Kings Co.: St. Patrick Rd.; West St. Peters; Queens Co.: Belle River; Glenroy; Mt. Vernon; St. Andrews; QUEBEC: D’Autray Reg.: Lanoraie; Montérégie Reg.: Stanbridge East; Outaouais Reg.: Beechgrove; Gatineau Pk., Fairy Lake; Gatineau Pk., Harrington Lake; Hull; SASKATCHEWAN: Division No. 1: Estevan.

USA. ALABAMA: Mobile Co.: Mobile; ARKANSAS: Franklin Co.: Altus; Garland Co.: Hot Springs ; Hot Spring Co. : Malvern; Logan Co.: Mt. Magazine; Lonoke Co.: Lonoke; Polk Co.; Scott Co.: Boles; Sevier Co.: De Queen; COLORADO: Elbert Co.: Running Creek Field Sta.; Jefferson Co.: Morrison; Plainview, 13 mi. N Golden; Sedgwick Co.: Julesburg, 2.5 km S; CONNECTICUT: Fairfield Co.: Stamford; Litchfield Co.: Colebrook; Sharon, 1 mi. S; Westbury; New London Co.: Niantic; Tolland Co.: Vernon; DISTRICT OF COLUMBIA: Washington; FLORIDA: Alachua Co. : Gainesville; Baker Co.: Osceola N.F., nr. Olustee; Brevard Co.: Malabar, Malabar Rd.; Titusville, SR 405; Calhoun Co.: Clarksville; Collier Co.: Colliers-Seminole S.P.; Naples; Desoto Co.: Arcadia; Duval Co.: Jacksonville Beach; Gadsden Co.; Glades Co.: Lake Okeechobee, 5 mi. NW Lakeport; Hernando Co.: Lacoochee, 4 mi. NE; Highlands Co.: Archbold Biological Station, Lake Placid; Highlands, Hammock S.P.; Okeechobee, 15 mi. W; Jackson Co.: Florida Caverns S.P.; Jefferson Co.: Avalon Plantation; Lamont; Lake Co.: Ocala N.F., Alexander Spr. camp; Levy Co.: Chiefland; Manatee Co.: Oneco; Marion Co.: Ocala N.F., 30 mi. E Ocala; Orange Co.: Orlando; Pinellas Co.: St. Petersburg; Putnam Co.: Crescent City; Palatka; Sarasota Co. : Myakka River S.P.; Seminole Co.: Econ Wild-Area; Oviedo; St. Johns Co.: St. Augustine; Taylor Co.: Athena; Perry; Rt. 98 & Ecolina; Volusia Co. : Daytona; Wakulla Co. : Ochlockonee River S.P.; GEORGIA: Bryan Co.: Richmond Hill S.P.; Cook Co.: Reed Bingham S.P.; Floyd Co.: Rome; Fulton Co.: Atlanta; Harris Co.: Pine Mt.; Liberty Co.; St. Catherines Is.; Mitchell Co.: DeWitt; Rabun Co.: Rabun; Satolah; Richmond Co.: Augusta ; Fort Gordon; Towns Co.: Hiawassee; ILLINOIS: Champaign Co.: Homer; Urbana; Effingham Co.: Altamont; Johnson Co. : Goreville; Lake Co.: beach; Macoupin Co.: Carlinville; Pope Co.: Lusk Creek; Stephenson Co.: Freeport; Union Co.: Pine Hills; IOWA: Clayton Co.: Backbone S.P., nr. Strawberry Point; KANSAS: Cowley Co.; Decatur Co.; Doniphan Co.: Wathena; Douglas Co.: Baldwin, 4 mi. W, “Hole-in-Rock”; Eudora, 5.7 mi. SW; Lakeview; Lawrence; Lawrence, 5 mi. S; Ellis Co.: Hays; Kingman Co.: Caliste; Montgomery Co.: Cherryvale, 11 mi. S; Pratt Co.: Sawyer, 7 mi. N, 3 mi. E; Reno Co.: Nickerson, 12 mi. W; Reno; Riley Co.: Manhattan; Russell Co.: Wilson Lake; Sheridan Co.: Quinter, 5 mi. N; Quinter, 9 mi. N; Stafford Co.: Hudson, 4 mi. N; Hudson, 12 mi. NE; Sumner Co.: Caldwell, 9 mi. N; Wellington; MAINE: Franklin Co.: Rangeley, Middle Dam; Lincoln Co.: Waldoboro; Waldo Co. : Liberty; York Co.: Saco; MARYLAND: Baltimore; MASSACHUSETTS: Barnstable Co.: Orleans; Woods Hole; Bristol Co.: Fall River; Dukes Co.: Martha’s Vineyard; Hampshire Co.: Granby, nr. Aldrich Lk.; Granby, East St.; Granby, nr. Pitchawam Swamp; South Hadley, nr. Lyman Terrace; Middlesex Co.: Holliston; Natick; Reading; Waltham; Norfolk Co.: Dover; Milton; Needham; Wellesley; Plymouth Co.: Minot; Suffolk Co.: Dorchester; Forest Hills; Worcester Co.: Petersham; MICHIGAN: Allegan Co.: Allegan S.F.; Branch Co.: California; nr. Tekonsha; Calhoun Co.: St. Marys Lk.; Tekonsha; Emmet Co.: Cross Village, N; Hillsdale Co.; Huron Co.: Port Hope; Ingham Co.: East Lansing; Jackson Co.: MacCready Res.; Kalamazoo Co.: Gull Lake Biol. Sta.; Portage; Kalaska Co.; Manistee Co.: Kaleva; Mason Co.; Pierport; Midland Co.; Montmorency Co.; Oscoda Co.: Luzerne; Saginaw Co.: St. Charles; Shiawassee Co.; Van Buren Co.: Van Buren S.P.; Wexford Co.; MINNESOTA: Chippewa Co.: Lac Qui Parle, 3.5 mi. SE Milan; Freeborn Co.: Albert Lea; Ottertail Co.: Rush Lake, 7 mi. S Perham; Pine Co.: Lower Tamarack R.; MISSOURI: Dallas Co.: Buffalo; Greene Co.: Willard; Jackson Co.: Atherton; Laclede Co.: Lebanon; Lebanon, 12 mi. E; Ozark Co.: Tecumseh; Phelps Co.: Beaver Creek; Shannon Co.: Round Springs; Taney Co.: Branson; MONTANA: Carbon Co.: E. Rosebud Cyn.; NEBRASKA: Dawes Co.: Chadron, 15 mi. SW; Hooker Co.; Keith Co.: Lake McConaughy; Lancaster Co.: Malcolm; Thomas Co.: Halsey; Thedford; NEW HAMPSHIRE: Belknap Co.: Center Harbor; Meredith; Meredith Ctr.; Cheshire Co.: Nelson; Dawson Co.: Overton; Hillsborough Co.: Francestown; Pelham; NEW JERSEY: Bergen Co.; Camden Co.: Haddon Heights; Gloucester Co.: Pitman; NEW YORK: Albany Co.: Colonie; Rensselaerville, Huyck Pres.; Broome Co.; Cayuga Co. : Fair Haven, N; Fair Haven S.P.; Cortland Co.: McLean Bogs; Essex Co.; Genesee Co.; Nassau Co.: Lynbrook; Sea Cliff; Niagara Co.; Oswego Co.: Minetto; Selkirk Shores S.P.; Saratoga Co.; Seneca Co. : Junius Ponds, 6 mi. N Waterloo; Montezuma Wildlife Ref.; Suffolk Co.: Dix Hills; Gardiner’s Is.; Greenport; Hauppauge, 2 mi. S; Mattituck; Montauk; Orient; Southold; Tioga Co. ; Tompkins Co.: Danby; Enfield, Teeter Rd.; Freeville; Ithaca; Ithaca, Cayuga Inlet ; Ithaca, Van Natta`s Dam; Mud Creek; NORTH CAROLINA: Alleghany Co.: Scenic Hwy.; Beaufort Co.: Core Point; Brunswick Co.: Southport; Buncombe Co.: Black Mountain; Burke Co.: Lake James; Craven Co.: New Bern; Duplin Co.: Coastal Plains Veg. Res. Stn., Faison; Faison; Warsaw; Graham Co.: Robbinsville; Henderson Co.: Whiteside Mt.; Hyde Co.; Jackson Co.: Glenville; Rich Mountain; Tuckasegee; Johnston Co.: Clayton; Clayton, 2 mi. W, Exp. Sta.; Jones Co. : Pollocksville; Macon Co.: Franklin; Highlands; Wayah Bald; Wayah Bald, base; Madison Co.: Marshall; McDowell Co.: Marion; Moore Co.: Aberdeen; Cameron; Carthage, 2 mi. SW; Southern Pines; Southern Pines, 8 mi. S, Roseland Rd.; Southern Pines, 10 mi. N; Pender Co.: Holly Shelter; Montague; Willard; Rabun Co.: Pine Mt.; Rabun Bald; Sampson Co.: Ivanhoe; Taylor’s Bridge; Transylvania Co.: Pisgah Forest; Wake Co.: Raleigh; Wayne Co.; Wilkes Co.: Wilkesboro; Yancey Co.: Mt. Mitchell; NORTH DAKOTA: Cass Co.: Fargo; Ransom Co.: McLeod, 1 mi. SE; OHIO: Fulton Co.: Swanton; Muskingum Co.: Zanesville; Summit Co.: Barberton; OKLAHOMA: Alfalfa Co.: Cherokee; Atoka Co.: Caney; Caddo Co. : Red Rock Canyon S.P.; Choctaw Co.: Hugo; Creek Co.: Jennings, 2 mi. S; Jennings, 4 mi. S; Grady Co.: Rush Springs, 3 mi. N; Latimer Co.: Wilburton; Le Flore Co.: Big Cedar; Mayes Co.: Locust Grove; McCurtain Co.: Broken Bow; Eagletown; Idabel; Murray Co.: Sulphur; Muskogee Co.: Fort Gibson; Okmulgee Co.: Henryetta; Pawnee Co.: Hominy; Jennings, 4 mi. N; Pawhuska; Wynona; Payne Co.: Stillwater, 3 mi. E; Pittsburg Co.: Quinton; Sequoyah Co.: Gore; PENNSYLVANIA: Allegheny Co.: Pittsburgh; Philadelphia Co.: Mt. Moriah; Westmoreland Co.: Jeannette; RHODE ISLAND: Washington Co.: Davisville; Wakefield; SOUTH CAROLINA: Aiken Co.: Aiken; Charleston Co.: Charleston; Horry Co.: Myrtle Beach; Oconee Co.: Mountain Rest; SOUTH DAKOTA: Aurora Co. : Plankinton; Bennet Co.: Martin; Bon Homme Co.: Springfield; Brookings Co.: Brookings; Custer Co.: Custer S.P.; Fall River Co.: Hot Springs ; Lawrence Co.: Whitewood; Lincoln Co.: Lake Hendricks; Union Co.: Elk Point; Walworth Co.: Mobridge; TENNESSEE: Cumberland Co.: Black Mt.; Hardeman Co.: Bolivar; Hardin Co.: Savannah; Lawrence Co.: Lawrenceburg; Morgan Co.: Jct. of Obed R. & Daddy’s Creek; Sevier Co.: Gatlinburg; TEXAS: Bastrop Co.: Sayers; Caldwell Co.: Luling; Camp Co.: Daingerfield; Clay Co.: Henrietta; Harrison Co.: Darco, 1 mi. S; Lee Co.: Fedor; Giddings; Lexington; Milam Co.: Rockdale; Morris Co. : Daingerfield S.P.; Nagadochee Co.: Nagadochee; Shelby Co.: Timpson; VERMONT: Bennington Co.; Windham Co.: Brattleboro; Dummerston; S. Newfane; Windsor Co.: Woodstock; VIRGINIA: Falls Church; Arlington Co.: Glencarlyn; Fairfax Co.: Dunn Loring; Great Falls; Prince George Co.: Fort Lee; Westmoreland Co.: Westmoreland S.P.; WEST VIRGINIA: Hardy Co.: Lost River S.P.; Pendleton Co.: Spruce Knob; WISCONSIN: Burnett Co.: Kettle R. rapids; Namekagon R.; Randal; Yellow R.; Grant Co.: Rutledge; Wyalusing; Jackson Co.; Juneau Co.; Manitowoc Co.: Two Rivers; Milwaukee Co.: Milwaukee; Monroe Co.; Pierce Co.: Maiden Rock; Prescott; Polk Co.: Farmington Twp.; St. Croix Co.: North Hudson; Vernon Co.: Genoa; Walworth Co.: Army Lake, nr. East Troy; Waushara Co.: Wild Rose; Wood Co.; WYOMING: Goshen Co.: Jay Em.

Figures

FIGURE 4. Faces of female Lasioglossum subgenus Hemihalictus in frontal view. (A) L. birkmanni. (B) L. fedorense. (C) L. foxii. (D) L. inconditum. (E) L. lustrans. (F) L. macoupinense. (G) L. nelumbonis. (H) L. pectinatum. (I) L. pectorale. (J) L. sopinci. (K) L. swenki. Scale bar = 1 mm.

FIGURE 5. Drawings of inner metatibial spurs of female Lasioglossum subgenera Hemihalictus (A-K), Evylaeus (L), and Sphecodogastra (M-Q). (A) L. birkmanni. (B) L. fedorense. (C) L. foxii. (D) L. inconditum. (E) L. lustrans. (F) L. macoupinense. (G) L. nelumbonis. (H) L. pectinatum. (I) L. pectorale. (J) L. sopinci. (K) L. swenki. (L) L. cinctipes. (M) L. boreale. (N) L. comagenense. (O) L. quebecense. (P) L. seillean. (Q) L. truncatum. See McGinley (2003) figures 61, 62, and 65 for images of inner metatibial spurs of L. lusorium, L. oenotherae, and L. texanum.

FIGURE 6. Faces of male Lasioglossum subgenus Hemihalictus in frontal view. (A) L. birkmanni. (B) L. fedorense. (C) L. foxii. (D) L. inconditum. (E) L. lustrans. (F) L. macoupinense. (G) L. nelumbonis. (H) L. pectinatum. (I) L. pectorale. (J) L. sopinci. (K) L. swenki. Scale bar = 1 mm.

FIGURE 7. Genital capsule of male Lasioglossum subgenus Hemihalictus in dorsal view. (A) L. birkmanni. (B) L. fedorense. (C) L. foxii. (D) L. inconditum. (E) L. lustrans. (F) L. macoupinense. (G) L. nelumbonis. (H) L. pectinatum. (I) L. pectorale. (J) L. sopinci. (K) L. swenki. Scale bar = 1 mm.

FIGURE 8. Genital capsule of male Lasioglossum subgenus Hemihalictus in ventral view. (A) L. birkmanni. (B) L. fedorense. (C) L. foxii. (D) L. inconditum. (E) L. lustrans. (F) L. macoupinense. (G) L. nelumbonis. (H) L. pectinatum. (I) L. pectorale. (J) L. sopinci. (K) L. swenki. Scale bar = 1 mm.

FIGURE 33. Lateral habitus of female Lasioglossum (Hemihalictus) pectorale (Smith). Scale bar = 1 mm.

FIGURE 34. Lateral habitus of male Lasioglossum (Hemihalictus) pectorale (Smith). Scale bar = 1 mm.

FIGURE 35. Distribution map of Lasioglossum (Hemihalictus) pectorale (Smith). Heat map indicates predicted suitable range based on maximum entropy niche-modelling. Black circles indicate actual geo-referenced specimen records.

FIGURE 43. Faces of female Lasioglossum subgenera Evylaeus (A) and Sphecodogastra (B-I) in frontal view. (A) L. cinctipes. (B) L. boreale. (C) L. comagenense. (D) L. lusorium. (E) L. oenotherae. (F) L. quebecense. (G) L. seillean. (H) L. texanum (I) L. truncatum. Scale bar = 1 mm.

FIGURE 75. Propodeum and metapostnotum of female Lasioglossum. (A) L. nelumbonis showing appressed hairs. (B) L. quebecense showing strong propodeal carinae. (C) L. foxii showing weak-absent propodeal carinae.

FIGURE 76. Mesepisternum of female Lasioglossum. (A) L. inconditum showing weak, rugulose sculpture. (B) L. pectinatum showing punctation. (C) L. pectorale showing coarse, rugose sculpture throughout. (D) L. comagenense showing weak, rugulose sculpture. (E) L. lusorium showing appressed pubescense. (F) L. truncatum showing rugose sculpture becoming rugulose anterior to mesocoxa.