Lasioglossm egregium (Vachal)

Lasioglossm egregium (Vachal)

Halictus egregius Vachal, 1904:476 [female].—Cockerell, 1905a:90 [key].—Crawford, 1906:303 [comparison to H. trizonatus].—Michener, 1951:1107 [synonymy with L. trizonatum].—Moure and Hurd, in press [lectotype designation].

TYPE MATERIAL.—The type material of L. egregium is deposited in the Naturhistorisches Museum, Vienna. Moure labeled one of Vachal's two females the lectotype in 1958 and has recently published this designation (Moure and Hurd, 1986). The lectotype is labeled

Brit.[ish] Columb[ia] Yale 189[year not indicated]/egregius det. J. Vachal [handwritten by Vachal?]/H.[alictus] egregius Vach[al] [handwritten by Vachal?]/Lectotype egregius Vach[al] det.[ermined by] J.S. Moure 1958 [handwritten by Moure].

The specimen is missing the right rear wing but is otherwise in excellent condition and clearly shows the diagnostic straight lateral edge of tergum II (Figure 63). I have attached a yellow paralectotype label to Vachal's other type specimen.

DISTRIBUTION (Figure 682).—Lasioglossum egregium has been collected in British Columbia, Alberta, Manitoba, and every American state west of the 104th meridian.

DIAGNOSIS.—Females of L. egregium can be recognized by the straight lateral edge of tergum II (Figure 63). Males have elongate heads (Figure 684, length/width ratio x = 0.98, n = 15) and extremely elongate, erect lateral hair tufts on sternum V (Figure 687). The lateral hair tufts on sternum V are as long as those on the preceeding segment and together form a continuous, uninterrupted hair fringe. Other males occurring in western United States and Canada that have erect lateral hair tufts on sternum V are L. mellipes, which have yellowish orange hind tarsi, certain L. trizonatum males that have antennal tyli (Figure 714) and noticeably shorter hairs on sternum V than on IV, and L. athabascense, which have a shorter head (Figure 289, length/width ratio x = 0.95, n = 20) and a rounded clypeal surface (clypeal surface flat in L. ergregium).

DESCRIPTION.—FEMALE: As described for L. anhypops except as follows: (1) Length 8.8–10.8 mm (x = 9.7, n = 15); (2) wing length 2.6–3.2 mm (x = 3.0, n = 15); (3) abdominal width 2.8–3.3 mm (x = 3.0, n = 15).

Structure: (4) Head elongate (Figure 683; length/width ratio 0.92–1.0, x = 0.96, n = 15). (9) Clypeus projecting approximately 0.88 of its length below lower margin of eyes.

(46) Lateral edge of metasomal tergum II virtually straight (Figure 63).

Vestiture: (75) Pubescence of thorax mostly yellowish white, white on pronotal lateral angle, pronotal lobe and metanotum. (80) Acarinarium present (Figure 693), a moderately large glabrous area at base of tergum I, surrounded laterally by elongate fringe hairs, which lack a sharply delimited border; acarinarial surface often with some scattered hairs; dorsal opening of acarinarium moderately wide, not sharply delimited, width slightly less than width of lateral hair fringe as seen in dorsal view.

MALE: As described for L. anhypops except as follows: (1) length 7.2–9.8 mm (x = 7.9, n = 15); (2) wing length 2.2–2.7 mm (x = 2.5, n = 15); (3) abdominal width 1.8–27.7 mm (x = 2.1, n = 15). (4) Head elongate (Figure 684); length/width ratio 0.92–1.0 (x = 0.98, n = 15). (68) Clypeal maculation present.

Vestiture: Sternal vestiture as in Figure 687; (82) hairs on sternum IV erect, moderately elongate medially, gradually becoming longer laterally, forming conspicuous lateral erect hair tufts; (83) vestiture of sternum V similar to that of sternum IV (median hairs on sternum IV shorter than those on V).

FLIGHT RECORDS (Figure 694).—Females of L. egregium have been collected in every month from February through November, with 65% of the records coming from June and July, with a peak in late June. Males have been taken from April to October, with 73% of the records from August and September.

FLOWER RECORDS.—Females (116): Scrophulariaceae 21%; Compositae 18%; Rosaceae 10%. Males (44): Compositae 93%. Total: 160 in 20 families, 47 genera as follows:

Apocynum 1; Arctium 1; Arctostaphylos 2; Aster 1, 23 (15 labeled Aster and Grindelia); *Baccharis 1(1); Barbarea 1; Beloperone 1, *Brassica 1(1); Carduus 1; Centaurea 3; Chrysothamnus 2, 2; Cirsium 1; *Clarkia 2(2); *Erigeron 10(9), 1; *Eriodictyon 3(3), 1; Eriogonum 1; Erysimum 1; *Gilia 1(1); Grindelia 1; Gutierrezia 4; *Hackelia 1(1); Haplopappus 1; Hymenoxys 4; Hyptis 1; Iris 1; Isomeris 3; *Lepidum 7(7); Lotus 1; Marrubium 2; Melilotus 7; *Oenothera 1(1); Pastinaca 1; *Penstemon 21(8); *Phacelia 5(4); *Physocarpus 8(8); *Polemonium 2(2); Pontentilla 1; 1; *Prunus 2(2); *Rhus 1(1); Ribes 1; *Rosa 1(1); *Salix 9(1); Scrophularia 3; *Senecio 1(1); 3; Sisymbrium 1; Stenotopsis 2; Trifolium 2.

SPECIMENS EXAMINED.—894 (686, 208).

CANADA. ALBERTA: Banff. BRITISH COLUMBIA: Agassiz, Harrison Mills, Lillooet (Seton Lake), Nanaimo, Oliver, 7 mi N, Osoyoos, Robson (Waldie Road), Salmon Arm, Vernon. SASKATCHEWAN: Saskatoon.

UNITED STATES. ARIZONA: Apache Co.: Alpine; Cochise Co.: Bear Wallow, Sta. Catalina Mts.; Coconino Co.; Gila Co.: Globe; Mojave Co.: Hualapai Mts.; Navajo Co.: Navajo Mt.; Pima Co.: Sta. Catalina Mts., Marshall Gulch. CALIFORNIA: Alameda Co.: Arroya Mocha; Alpine Co.: Del Norte Co.: Gasquet; El Dorado Co.; Fresno Co.; Humboldt Co.: Shelter Cove; Inyo Co.; Kern Co.; Los Angeles Co.; Madera Co.: Ediza Lake, SE Slope Green Mt., meadow near locked gate on road to Mark Mine, first mine prospect above Willow Meadow; Mariposa Co.: Lake Tenaya (Yosemite National Park); Modoc Co.: Buck Creek Ranger Station; Mono Co.: Monterey Co.; Nevada Co.: Boca, Donners Summit; Placer Co.: G. Alpine Creek, Tahoe; Riverside Co.; San Benito Co.; San Bernardino Co.; San Diego Co.: Mt. Laguna, Pine Valley; San Luis Obispo Co.: La Panza Camp, Santa Margarita, 5 mi NE; Santa Clara Co.: Pacheco Pass; Shasta Co.: Hat Creek; Sierra Co.: Yuba Pass; Siskiyou Co.: Castle Lake, Lava Beds National Monument (Cave Loop Road), Poker Flat (21 mi NW Happy Camp); Tehama Co.: Deer Creek; Tuolumne Co.: Chipmunk Flat, Emigrant Lake, Strawberry Lake; Ventura Co.: Grade Valley (9 mi SW Stauffer P.O.), Lockwood Valley (near Stuaffer P.O.), Quatal Canyon (NE part of county).

COLORADO: Archuleta Co.: Chimney Rock, Piedra; Boulder Co.; Chaffee Co.: Monarch Pass (2 mi W Garfield), Salida; Clear Creek Co.: Idaho Springs; Costilla Co.: Ft. Garland, 12 mi NE; Delta Co.: Paonia; Denver Co.: Denver; Douglas Co.: Franktown, 5 mi SSW; El Paso Co.: Foster Ranch, Garden of Gods, Manitou Park, Pike's Peak; Fremont Co.: Coaldale, 4 mi S, 5 mi S, 5 mi SW (Hayden Creek Campground); Garfield Co.: Douglas Pass (2.5 mi N), Rifle, White River Forest (10 mi NE Glenwood Springs); Gilpin Co.: Rollinsville, 1 mi N; Grand Co.: Hot Sulfur Springs (2 mi E), Kremmling; Gunnison Co.: Cement Creek Road, Crested Butte, 15 mi SE Jack's Cabin Cutoff Road; Huerfano Co.: North LaVeta Pass, 8 mi E; Jefferson Co.: Eldorado (1 mi S), Morrison, Plainveiw (13 mi N Golden); La Plata Co.: Durango; Larimer Co.; Las Animas Co.: Starkville; Mesa Co.: Grand Mesa (Land's End Road); Mineral Co.: South Fork Rio Grande River, 8 mi NW; Moffat Co.: Harper Corner; Montezuma Co.: Mesa Verde National Park; Montrose Co.: Buckeye Reservoir, Gunnison River Portal; Rio Grande Co.: South Fork, 3 mi W; Routt Co.: Phippsburg, 3 mi E; Saguache Co.: Cochetopa Creek; Teller Co.: Florissant Fossil Beds, Pike's Peak Halfway House.

IDAHO: Butte Co.: Craters of the Moon National Park; Bonneville Co.: Selander Park (10.5 mi SW Idaho Falls); Custer Co.: Herd Creek at East Fork Salmon River, Morgan Creek, Stanley (20–25 mi NE); Elmore Co.: Tollgate; Franklin Co.: Cub River Canyon, Preston, 28 mi E; Fremont Co.: Island Park, Ripley Butte; Idaho Co.: Harpster Grade; Kootenai Co.: Athol, Chilco, Coeur d’Alene; Latah Co.: Potlatch, Troy, 6 mi S; Lemhi Co.; Nez Perce Co.: Coyote Grade, Lewiston, Nez Perce, 10 mi N; Oneida Co.: Black Pine Canyon; Owyhee Co.: Indian Hot Springs, Jump Creek (10 mi N Homedale), Murphy Hot Springs. MONTANA: Broadwater Co.: Townsend, 14 mi E; Carbon Co.: East Rosebud Canyon, Roscoe, 3 mi SE; Gallatin Co.: Bozeman (15 mi S, 20 mi SW), Squaw Creek; Glacier Co.: Lake St. Mary; Lake Co.: Elmo; Lewis and Clark Co.: Helena, 10 mi N; Missoula Co.: Missoula; Musselshell Co.: NEVADA: Clark Co.; Douglas Co.: Valley Hot Springs; Elko Co.: Lamoille; Esmerelda Co.: Lida; Humboldt Co.: Santa Rosa Range; Storey Co.: Virginia City; White Pine Co.: Baker (7 mi W), Snake Creek. NEW MEXICO: Catron Co.: Bursum Camp (18 mi E Alma), Mogollon, 2 mi E; Colfax Co.: Cimarron Canyon, Ute Park, 2 mi W; Grant Co.: Silver City, 13–14 mi N (McMillan Camp); Sandoval Co.: Jemez Springs; Santa Fe Co.: Little Tesuque Canyon, vicinity Santa Fe. Santa Fe Canyon, Santa Fe; Socorro Co.: Magdalena.

NORTH DAKOTA: Stope Co.: Burning coal vein. OREGON. Baker Co.: Cornucopia, Union, 24 mi SE (Upper Goose Creek), 36 mi SE (Lower Goose Creek); Benton Co.: Corvallis; Lake Co.: Antelope Butte, Middle Fork Crooked Creek, Warner Mts.; Linn Co.: High Cascade Mts, Marion Forks; Union Co.: La Grande, Union, 28 mi SE (Upper Lick Creek); Wallowa Co.: Elgin (8 mi W), Hat Point, Wallowa Lake State Park (6 mi S Enterprise); Wheeler Co.: Mitchell, 1 mi E. SOUTH DAKOTA. Custer Co.: Custer State Park; Fall River Co.: Edgemont, Hot Springs; Lawrence Co.: Spearfish, 15 mi SSW.

UTAH: Beaver Co.: Beaver, Kent's Lake; Cache Co.; Carbon Co.: Helper; Daggett Co.: Pipe Creek; Duchesne Co.: North Fork Duchesne River; Garfield Co.: Bryce Canyon National Park; Grand Co.; Iron Co.: Buckskin Valley; Juab Co.: Ibapah-Callao Pass, Mt. Nebo; Summit Co.: Kamas, Riley Canyon, Wanship; Tooele Co.: South Willow Canyon (Stansbury Mts.), Tooele; Uinta Co.: Long Lake Reservoir, Route 44; Utah Co.: Provo; Washington Co.: Upper Deep Creek, Zion Canyon; Weber Co.: Farmington Canyon, Ogden. WASHINGTON. Mason Co.: Lake Cushman; Okanogan Co.: Omak; Pend Oreille Co.: Newport; Spokane Co.: Spokane; Whitman Co.: Pullman, Wawawai. WYOMING. Albany Co.: Laramie (8 mi SSE), Medicine Bow National Forest (Curtis Gulch Campground); Fremont Co.: Lander, 8.5 mi SW (Sinks Canyon); Park Co.: Muddy Creek, 1 mi S (Clark's Fork River), Sunlight Basin, north of Cody; Teton Co.; Weston Co.: Newcastle, 6 mi NW, 22 mi W.