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Text used courtesy of the Illinois Natural History Survey from:
LaBerge, W. E., Thorp, R. W., 2005. A revision of the bees of the genus Andrena of the Western Hemisphere. Part XIV. Subgenus Onagrandrena. Illinois Natural History Survey Bulletin 37: 1-63.
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Andrena camissoniae is a moderately large bee related to rubrotincta and mojavensis but marked by the pale buff or ochraceous vestiture in both sexes. In addition both sexes have the propodeum somewhat more coarsely sculptured as in rubrotincta or mojavensis and slightly darker wing membranes. Since the male has not been previously described, a complete description is given below.
FEMALE: MEASUREMENTS AND RATIOS. — N = 2; length, 10-11 mm; width, 3.0-3.5 mm; WL, 3.67-4.05 mm; FL/FW, 1.00-1.01; FOVL/FOVW, 3.28-3.31.
DIAGNOSIS. — Vestiture pale, yellowish to ochraceous, darker on face and dorsum of thorax, facial foveae with white tomentum in lower half or slightly more and reddish brown in upper half or less; wing membranes hyaline but slightly infumate, yellowish; metasomal terga piceous, without metallic reflections. Galeae as in oenotherae, labral process large, sides concave, apical part as broad as base of scape or slightly broader (Fig. 18); vertex above lateral ocellus equals less than one ocellar diameter. Clypeus with small round punctures separated mostly by less than half a puncture diameter, with very narrow impunctate median line. Vertex above lateral ocellus equals about half an ocellar diameter; ocelli not enlarged. Pronotum as in rubrotincta. Mesoscutum and scutellum with small round punctures separated largely by about half a puncture width, interpunctural surfaces dulled by fine reticular shagreening. Propodeum with dorsal surface distinct; dorsal enclosure moderately sculptured (Fig. 21), often with complete median rugula and at least basal half rugulate; surface outside of enclosure with some rugulae and relatively coarse punctures (not punctatorugose); surfaces finely tessellate; mesepisternum extremely shallowly punctatorugose, bottoms of punctures dulled by fine shagreening. Metasomal terga 2-4 with apical areas with minute punctures separated by three to five puncture widths, apical rim impunctate; basal areas punctures larger, separated mostly by two to three puncture widths; surfaces shiny. Thoracic dorsum with hairs longer than scape width; propodeum with lateral corbicula not distinctly formed, internal hairs plumose; tibial scopal hairs long, simple, sparse, scarcely hiding surface; metasomal terga 1-A with basal area hairs erect, short (distinctly shorter than apical area hairs.
MALE: MEASUREMENTS AND RATIOS. — N = 3; length, 9-10 mm; width, 2.5-3.0 mm; WL, M = 3.06 ± 0.845 mm; FL/FW, M = 1.00 ± 0.003; FS1/FS2, M = 1.30 ± 0.035.
INTEGUMENTAL COLOR. Black except as follows: mandible with apical fourth rufescent; terga with apical areas translucent, rufescent; antennal scape reddish brown below; wing membranes hyaline, slightly infumate, yellowish, veins red to reddish brown.
STRUCTURE. Antennae in repose just reaching scutellum; scape length equals first three flagellar segments; Flagellar segment 1 longer than 2, about as long as 3, all flagellar segments longer than broad. Eyes each about three times as long as broad. Mandible with small, subapical inner tooth present (Fig. 22). Galeae long, dulled by fine tessellation. Maxillary palpus long, segmental ratio about as 1.0: 0.85: 1.0: 0.85: 0.85: 0.85. Labial palpus with ratio about as 1.0: 0.8: 0.5: 0.4, Labral process large, reflexed, strongly bidentate with Li-shaped median emargination (Fi1-1. 22). Clypeus short, punctures round, separated by half to one puncture width, surface shiny, without impunctate median line. Supraclypeal area moderately shiny, with small, close-set punctures. Face below ocelli with longitudinal rugae and interrugal punctures. Vertex above lateral ocellus equals about one ocellar diameter or slightly less. Genal area in profile twice as broad as eye, with posterior angle just below midline, surface dulled by fine shagreening and minute sparse punctures. Pronotum as in female. Mesoscutum and scutellum with crowded punctures and fine shagreening dulling surfaces. Propodeum sculptured as in female; mesepisterna with distinct punctures and shagreening dulling surface. Metasomal terga 2-5 sculptured as in female terga 2-4, surfaces shiny. Tergum 7 with pseudopygidial area absent or extremely narrow and hidden by hairs. Sterna 2-5 with basal areas punctate, apical areas impunctate, dulled by coarse shagreening. Terminalia as in decolorata as described below.
VESTITURE. Pale yellowish to ochraceous except reddish brown on vertex and along inner margins compound eyes. Clypeus weakly bearded; hind basitarsus with long sparse hairs, along anterior margin moderately long; metasomal tergum 2-4 with basal area hairs .short, mostly shorter by half than those of tergum 1 and distinctly shorter than hairs of apical areas, erect; sterna 2-5 with subapical fimbriae weak.
TYPE MATERIAL. — The female holotype (CAS No. 11, 394) of Andrena (O.) camissoniae was collected from 28 mi. NW of New Cuyama, Santa Barbara Co., California, June 8, 1963, at flowers of Camissonia campestris (as Oenothera dentata) by Stage.
DISTRIBUTION. — Andrena (O.) camissoniae is known from only a few localities in southern California (Fig. 6). It has been collected March 30 to June 8 from the localities listed below.
CALIFORNIA. FRESNO CO.: Coalinga (7 mi. W). MONTEREY CO.: Arroyo Seco Camp (near Greenfield). SANTA BARBARA CO.: New Cuyama (28 mi. NW).
FLORAL RECORDS. — Camissonia campestris.
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Identification |
Female.- Head and mesosoma dull black; metasoma shining black, posterior impressed tergal margins castaneous; pubescence pale ochraceous. Head with clypeus slightly shining, convex, densely punctate, without indication of a median longitudinal smooth line; labrum with process broad, about one-half length of first flagellar segment, as broad as long, distinctly elevated apex subtruncate, first segment measured along anterior margin, as long as second and third combined. Mesosoma with mesoscutum dullish, finely and closely punctured, punctures subcontiguous, less that one diameter apart, interspaces finely almost coarsely reticulate; mesoscutellum and mesopleura more closely punctate than mesoscutum, punctures contiguous; propodeum coarsely subcontiguously, reticulate-punctate, basal enclosure finely, longitudinally, and only slightly obliquely rugose, with a single fine well defined straight median ridge; wings lightly tinted dark brown; legs with scopae of posterior tibiae long, one and one-half times width of tibiae, and moderately dense. Metasoma moderately slender, shining, second tergum with most anterior hairs long, minutely but distinctly plumose, surface finely punctate, most punctures separated by from three to five diameters, terga two to four with apical impression broad and distinct, finely, sparsely punctate, impunctate margin very narrow but distinct, shining. Body length approximately 11mm, anterior wing 9mm.
Male.-Unknown.
Holotype female California Academy of Sciences, Entomology, from 28 miles northwest of New Cuyama, Santa Barbara County, California, 8 June 1963, at flowers of Oenothera dentate (= Camissonia campestris) between 7:20 and 7:30 a.m. (G. I. Stage) and 3 paratypes (California Insect Survey, University of California, Berkeley) all from the same locality and flowers as follows: one between 6:50 and 7:00 a.m., one between 7:10 and 7:20 a.m., and one between 7:20 a.m. and 7:30 a.m.
This distinctive species is tentatively assigned to the A. (O.) oenotherae complex (Linsley and Mac Swain, 1963) but differs from other known species not only in the ochraceous pubescence but the short, blunt labral process and the sculpturing of the propodeal enclosure.
Literature cited: Linsley, E. G., and J. W. MacSwain. 1963. Descriptions of new species and subspecies of Onagrandrena, principally of the Andrena oenotherae complex (Hymenoptera : Andrenidae). Pan-Pacific Ent., 39: 189-198.
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Andrena (Onagrandrena) camissoniae Linsley and MacSwain, 1968, Pan-Pacific Ent., 44: 144-145; Linsley, MacSwain, Raven, and Thorp, 1973, Univ. California Publ. Ent., 71: 27, 29.
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Updated: 2024-04-19 12:21:48 gmt
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