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Overview |
Reprinted by permission of the Regents of the University of California from:
Thorp, R. W. 1969. Systematics and ecology of bees of the subgenus Diandrena (Hymenoptera: Andrenidae). University of California Publications in Entomology 52: 1-146.
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This species is most closely related to A. olivacea from which it is distinguished by its duller mesoscutum, yellowish facial pubescence, and the coarsely striate lateral areas of the pronotum. Agoseris aurantiaca labels on several specimens from Ventura County should read Agoseris heterophylla.
FEMALE. — Integument golden-green; antenna dark brownish-black basally and above apically, yellow-brown below on apical 7 flagellar segments, forewing with stigma dark mahogany, clypeus with narrow subapical dark band with violaceous reflections; pubescence pale, golden-white except black laterally on face, above and behind eye, black intermixed with golden on antennal scape and mesoscutum, golden brown on anal fimbria, outer surface of tibial scopa white anteriorly, golden-brown on posterior third; facial fovea with sheen black, tomentum golden below, brownish above. Head moderately shiny, coarsely, closely punctate with tessellate interspaces; clypeus with punctures separated by less than one diameter; latero- and supraclypeal areas with punctures contiguous; facial fovea extending from summit of eye to middle of antennal base; eye slightly arcuate medially; antenna with segments 1 to 3 of flagellum as 12.5:4.5:5; labrum with process moderately long, deeply emarginate with apices divergent (fig. 27); subgenal coronet moderately long, well developed; gena moderately shiny, tessellate, moderately coarsely punctate, punctures separated by 1 to 2 diameters, short vertical striae present laterally below, becoming coarser ventroapically; pubescence of clypeus moderately long, suberect, sparse. Mesosoma dull, moderately coarsely punctate with tessellate interspaces; pronotum moderately shiny, shallowly, sparsely punctate, punctures separated by 1 to 2 diameters, vertically striate laterally, dorsolateral angles right-angled, with distinct lateral fold, posterior margin of pronotum nearly transverse; mesoscutum with surface moderately dull, punctures separated by one diameter, notaulus distinct; scutellum with punctures contiguous laterally and posteriorly, anteromedial punctures separated by one diameter; metanotum with punctures contiguous; propodeum coarsely punctate, punctures with dorsal edges produced, separated by about one diameter, enclosure longitudinally rugose basally, irregularly rugose laterally and apically; episternum 2 rugose-punctate anteriorly, punctate-tessellate posteriorly; wing pale, submarginals 1: 2 (32: 35), stigma : rest of marginal cell (14: 22.5), hind wing with jugal lobe narrow and without incision between it and vannal, reaching beyond level of cu-v; posterior trochanter with long, curved, golden, perfect floccus; tibial scopa long, dense, with hairs of posterior half of outer face branched, posterior hairs of scopa one and three-fourths times as long as width of tibia at apex; pubescence of mesoscutum with few long dark, several moderately long golden, and numerous short golden hairs intermixed. Metasoma moderately dull, finely, sparsely, distinctly punctate with tessellate interspaces, first tergum with punctures separated by 2 to 3 diameters, terga 2 to 5 with punctures finer, separated by 2 diameters on basal elevations, sparser on depressed margins; pubescence long on tergum 1, short on terga 2 to 5. Length 7.5 to 9 mm, forewing 6 to 6.5 mm.
MALE. — Integument dark olive-green with golden reflections, bluish on propodeum; antenna S uniformly dark brownish-black, forewing with stigma light mahogany, clypeus with subapical, transverse, dark line with violaceous reflections; pubescence pale, white except black laterally on face, above and behind eye, yellowish between antennal bases and on anal fimbria. Head shiny, coarsely, densely punctate with tessellate interspaces; punctures of clypeus, latero- and supraclypeal areas nearly contiguous; parocular depression short, linear; eyes slightly convergent below; antenna with segments 1 to 3 of flagellum as 12;5: 6.5; labrum with process strongly recurved and deeply emarginate apically (fig. 28); mandibles long, decussate; gena shiny, tessellate, mod¬erately finely punctate with punctures separated by 1 to 3 diameters above, laterally below and posteroventrally with fine vertical striae; pubescence of clypeus moderately long, sparse, sub-depressed. Mesosoma dull, moderately closely, coarsely punctate with tessellate interspaces; pronotum transversely tessellate, vertically striate laterally with sparse, moderately fine, shallow; punctures, punctures separated by 1 to 2 diameters or more, dorsolateral angle right-angled with distinct lateral fold, posterior margin of pronotum nearly transverse; mesoscutum with punc¬tures separated by 1 to 2 diameters, notaulus distinct; scutellum with punctures contiguous laterally and posteriorly, separated by one diameter anteriorly and medially; metanotum rugose-punctate; propodeum rugose-punctate, enclosure somewhat irregularly rugulose with median, longitudinal carina; episternum 2 rugose-punctate anteriorly, narrowly, longitudinally tessellate, finely punctate posteriorly; wing pale, submarginals 1:2 (29.5:32.5), stigma : rest of marginal cell (15:20), hind wing with jugal lobe narrow and without incision between it and vannal, reaching beyond level of cu-v; pubescence of mesoscutum long and sparse. Metasoma shiny, moderately finely, shallowly, sparsely punctate with tessellate interspaces; punctures of first tergum moderately coarse, separated by 1 to 3 diameters, terga 2 to 5 with punctures finer, separated by 1 to 2 diameters; pubescence long, suberect on tergum 1, about half as long on tergum 2, about one-third as long on terga 3 to 5 and becoming subdepressed. Length 6 to 7 mm, forewing 5.5 to 6 mm.
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Updated: 2024-04-19 23:03:47 gmt
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