Reprinted with permission of the American Entomological Society from:
LaBerge, W. E. 1980. A revision of the bees of the genus Andrena of the Western Hemisphere. Part X. Subgenus Andrena. Transactions of the American Entomological Society 106: 395-526.
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This relatively rare manzanita bee from California is closely related to A. prolixa LaBerge; The female of monogonoparia is like that of prolixa in lacking the basal inferior mandibular tooth, in having elongate mouthparts and an entire labral process; The female of monogonoparia differs from that of prolixa by the paler vestiture, shorter malar space, less punctate clypeus, and the dull, tessellate, impunctate, faintly metallic blue, metasomal terga; The male of monogonoparia is like that of prolixa in the elongate mouthparts and usually simple labral process but differs in the impunctate, tessellate, often metallic blue, metasomal terga and the lack of inferior basal mandibular teeth.
FEMALE. MEASUREMENTS AND RATIOS. — N = 20; length, 10-12 mm; width, 2-3 mm; wing length, M = 4.27 ± 0.116 mm; FL/FW, M = 0.96 ± 0.006; FOVL/ FOVW, M = 2.49 ± 0.041.
INTEGUMENTAL COLOR. — Black except as follows: mandible with apical third to half dark rufescent; flagellar segments 3 to 10 below dark reddish-brown; tegulae translucent, reddish-brown; wing membranes slightly infumate, yellowish, veins reddish-brown; terga 1 and 2 and often base of 3 with basal areas usually metallic-blue; tergal apical areas dark rufescent; sterna 2-5 with apical areas hyaline; tarsi dark rufescent; tibial spurs testaceous.
STRUCTURE. — Antennal scape length equals first three and one-half flagellar segments; flagellar segments as in prolixa; Eyes each four times as long as broad or slightly shorter, inner margins parallel or converging slightly towards ocelli; Mandible as in prolixa, without basal tooth; Malar space not elongate, minimum length about one-fourth basal width of mandible; Galea and glossa elongate as in prolixa; Maxillary palpus as in frigida but segmental ratio about as 1.0:0.7:0.7:0.6:0.5:0.5; Labial palpus as in frigida but ratio about as 1.0:0.6:0.5:0.5; Labral process entire, triangular with rounded apex, flat, surface dulled by shagreening and fine transverse wrinkles; labrum apical to process flat, dull, without cristae; Clypeus as in prolixa but punctures small, sparse, separated by two to five puncture widths; surface moderately dulled by weak shagreening; Supraclypeal area and face above antennal fossae as in prolixa but facial rugulae weaker; Facial fovea, vertex and genal area as in prolixa; Thoracic form and sculpturing as in prolixa except as follows: mesoscutal punctures obscured by tessellation but visible, in anterior half separated by half to one puncture width; scutellum shiny; propodeum more coarsely tessellate.
Metasomal terga 1-4 with basal areas impunctate or virtually so, finely tessellate, apical areas reticularly shagreened with obscure punctures; Pygidial plate with apex blunt, broadly rounded, internal raised triangle weak; Sterna as in prolixa.
VESTITURE. — Head white except as follows: fovea dark brown; upper part of face, along inner margins eyes, on vertex mixed with pale, on upper genal area dark brown; Thoracic hair pale, white to pale ochraceous except mesoscutum and scutellum with long dark hairs mixed with the pale; Leg hairs white except as follows: fore and middle tibiae, tarsi and posterior half to three-fourths of hind tibia with dark brown.
Metasomal terga 1-3 and often 4 with white hairs; terga 5 and 6 and apex of 4 with brown hairs; sternal hairs chiefly white; Tibial scopal hairs simple, long; propodeal corbiculum complete, with few or no internal hairs; trochanteral flocculus complete.
MALE. MEASUREMENTS AND RATIOS. — N = 20; length, 9-11 mm; width, 1.5-2.0 mm; wing length, M = 3.64 ± 0.134 mm; FL/FW, M = 0.92 ± 0.006; FS1/FS2, M = 1.01 ± 0.021.
INTEGUMENTAL COLOR. — As in female but tergal basal areas occasionally lacking metallic-blue reflections.
STRUCTURE. — Antennal scape length equals first two and one-fourth flagellar segments or more; flagellar segment 1 about as long as segment 2, shorter than segment 3, longer than broad; Mandible moderately long, when closed outer mandible extends beyond midlabrum by about one-fourth its own length or less; without basal inferior angle or tooth; Malar space, galea and glossa as in female; Maxillary palpus as in female; Labial palpus as in female but ratio about as 1.0:0.7:0.5:0.5; Labral process entire, triangular with rounded apex, moderately reflexed, shiny; labrum apical to process convex, shiny, without crista; Clypeus narrowed towards labrum, evenly punctate with punctures separated mostly by half a puncture width, slightly more near midline, without impunctate midline or subapical area; surface shiny to dulled by weak shagreening; Supraclypeal area, face above antennal fossae and vertex as in female; Genal area as in prolixa but dulled by fine dense reticular shagreening except in narrow zone adjacent to eye; Thoracic form and sculpturing as in female except pronotal ridge and angle more distinct.
Metasomal terga 1-5 sculptured as in female terga 1-4; Tergum 7 with narrow, dull pseudopygidial area; Sterna 2-5 sparsely punctate, dulled by coarse reticular shagreening; sternum 6 with apical margin flat.
Terminalia as in figures 137-141; note sternum 7 with truncate apex; penis valves with blunt tips and broad dorsolateral wings.
VESTITURE. — As in female except as follows: terga 1-5 with pale hairs; terga 6 and 7 with brown and pale hairs mixed; sternal hairs pale, without subapical fimbriae or these weak.