Reprinted with permission from: Mitchell, T.B. 1960 Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 141.
FEMALE Length 9-11 mm.; eyes convergent below; length of malar space about one- fourth its breadth; facial foveae small, rather narrow, elongate-triangular; antennae obscurely reddened apically, length and breadth of median segments subequal; clypeus rather shiny, punctures irregular, rather deep and distinct, rather close basally and laterally, sparse apically; pubescence of head and thorax pale ochraceous, without dark admixture; lateral angles of pronotum sharply acute hut not spine-like; metapleural protuberance not carinate; tegulae ferruginous; wings hyaline, slightly violaceous, veins end stigma reddish-piceous; scutum shining, punctures deep and distinct, fine and close over anterior half, more coarse posteriorly, with a quite distinct, median, sparsely punctate area; anterior margin of scutellum smooth and impunctate, becoming closely and coarsely punctate posteriorly; pleura shining, punctures coarse. deep and distinct, evenly spaced, interspaces about a puncture width; anterior coxae not spined; tarsi dark, length of hind basitarsi about four times the breadth, spurs yellowish; abdominal terga closely and finely punctate, deep and more coarse and distinctly separated on basal segment, becoming minute, obscure and very close on the more apical segments; apical margins of terga depressed, faintly reddish beneath the dense white fasciae, widely interrupted on basal segment, entire on the remainder: discs of terga with short, erect and inconspicuous fuscous pubescence.
MALE-—Length 7-9 mm.; eyes convergent below; length of malar space about two-thirds its breadth; antennae somewhat reddened, median segments not quite twice as long as broad; upper portion of clypeus closely punctate beneath pubescence, lower portion micro sparsely punctate; pubescence of head and thorax pale ochraceous, without dark admixture; lateral angles of pronotum sharply acute but not spine-like; metapleural protuberance not carinate; tegulae dark reddish-piceous, shining; wings hyaline, slightly violaceous, veins and stigma reddish-piceous; scutum shining; punctures of anterior portion rather fine and close, interspaces about equalling the puncture width, punctures becoming more sparse posteriorly, with a quite distinct median shining area nearly impunctate; punctures of scutellum quite similar, rather sparse anteriorly, closer but not crowded posteriorly; punctures of pleura about as those of scutum anteriorly; legs somewhat reddened, basitarsi slender; spurs yellowish; punctures of abdominal terga close and fine, deep and distinct on basal segment, becoming minute and obscure on the more apical segments; apical margins of terga depressed, somewhat red- cloned beneath the entire white fasciae; discs of terga with short, erect and inconspicuous fuscous pubescence.
DISTRIBUTION—In the East this occurs in Nova Scotia, New York, Indiana and Illinois, and southward through the Appalachians as far as North Carolina, but it is primarily Western, reaching Arizona, California and British Columbia. It is in flight from early June to early September.
FLOWER RECORDS—Stephen records this on Heracleum, Medicago sativa, Melilotus, Pentstemon, Potentilla and Symphoricarpos.
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