Reprinted with permission of the American Entomological Society from:
Ribble, D. W. 1974. A revision of the bees of the genus Andrena of the Western Hemisphere. Subgenus Scaphandrena. Transactions of the American Entomological Society 100: 101-189.
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Andrena hicksi is most closely related to A. bruneri and can be distinguished in the female by the longer hairs on the thoracic dorsum, wide impunctate midline of the clypeus, longer tibial scopal hairs and sparser punctures on the abdominal terga.
The descriptions below are based mainly on a female from Boulder Canyon and a male from Ben Lomond, Utah.
FEMALE. — MEASUREMENTS AND RATIOS. — Length, 10.2 mm; width, 2.9 mm; wing length, 7.7 mm; PL/FW, 1.12; FOVL/FOVW, 5.50.
INTEGUMENTAL COLOR. — Color as in merriami.
STRUCTURE. — Antennal scape nearly as long as first four flagellar segments; flagellar segment 1 distinctly longer than segments 2 plus 3; antenna otherwise as in merriami. Eyes each about 4.1 times as long as broad, inner margins as in merriami. Mandible as in merriami. Galea as in merriami but longer. Stipes with hooked hairs. Labial palpus as in merriami but ratio about 1.0:0.7:0.7:0.7. Maxillary palpus as in merriami but ratio about 1.0:1.0:1.0:1.0:1.0:1.0. Labrum as in merriami. Clypeus as in merriami but entire midline broadly impunctate, shagreening absent in center. Supraclypeal area and face above antennal fossae as in merriami. Facial fovea narrow, separated from lateral ocellus by about one and one-half ocellar diameters, length as in merriami. Vertex and genal area as in merriami.
Pronotum, mesoscutum and scutellum as in merriami. Propodeum as in merriami but dorsolateral and posterior surfaces slightly smoother. Mesepisternum as in merriami. Wings with pterostigma rather small, about as broad as from inner margin prestigma to wing margin, vein 1st m-cu meets second submarginal cell just beyond middle of cell, second submarginal cell otherwise as in merriami. Tarsal claws untoothed, legs otherwise as in merriami.
Metasomal terga as in merriami. Pygidial plate as in merriami but without upturned margin. Sterna 2-5 as in merriami but punctures closer.
VESTITURE. — Entirely dark otherwise as in merriami except: thoracic dorsum with hairs of moderate length; tibial scopal hairs moderately long.
MALE. — MEASUREMENTS AND RATIOS. — Length, 8.6 mm; width, 2.3 mm; wing length, 7.1 mm; FL/FW, 1.15; FSI/FS2, 2.20.
INTEGUMENTAL COLOR. — As in merriami except middle and hind tibial spurs blackish.
STRUCTURE. — Flagellar segment 1 about as long as segments 2 plus 3; antenna otherwise as in merriami. Eyes and mandible as in merriami. Galea as in female. Labial palpus as in female but ratio about 1.0:0.5:0.5:0.7. Maxillary palpus as in female. Labrum as in merriami but process larger and triangular. Clypeus as in female but punctures smaller and more scattered. Remainder of head as in merriami.
Pronotum, mesoscutum, scutellum, propodeum and mesepisternum as in merriami. Wings as in female. Legs as in merriami.
Metasomal as in merriami.
Terminalia as in figures 85-89; note the following: gonocoxite with dorsal lobes rather short and broadly rounded, apex moderate in width; penis valve wide, with large dorsal lamellae, apex short, thick, broadly rounded, expanded at apex in ventral view, sternum 7 with large apical notch; sternum 8 with apex distinctly wider than neck region, apex deeply emarginate.
VESTITURE. — As in merriami except many dark hairs on legs and abdomen.
VARIATION. — It is thought that fresh male specimens would have most leg and abdominal hairs dark in color. None of the known males of this species are in good condition and some have rather light hairs on these areas.
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