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Extracted from Wallace E. LaBerge. 2001. Revision of the Bees of the Genus Tetraloniella in the New World (Hymenoptera: pidae). Illinois Natural History Survey Bulletin 36(3);67-162
This moderately large species is related to pomonae, distata, and davidsoni but differs in the strongly bowed out, shiny clypeus with a minimal oculoclypeal space in both sexes. In addition, the maxillary palpi are 5- segmented in both sexes, which is unusual for this group of species. In general it is most like pomonae but the shiny clypeus and other areas of the integument and the paler vestiture as described below will distinguish arizonica. The female has not been previously described.
FEMALE. Measurements and Ratios.- N = 1; length, about 13 mm; width, about 4.5 mm; wing length, about 3.26 mm; hooks in hamulus, 15; flagellar segment 1/2, 2.45.
Integumental Color.- Black except as follows: mandible with apical half ferruginous with golden stripe unless worn; tegulae piceous except summits tranlucent brown; wing membranes hyaline, colorless, veins dark blackish brown; metasomal terga piceous; sterna 2–5 piceous except apical areas hyaline, yellow; distitarsi ferruginous; tibial spurs testaceous.
Structure.- Clypeus strongly protuberant, oculoclypeal minimum space distinctly less than minimum width of first flagellar segment; with coarse elongate punctures, sparser near base, surface shiny, unshagreened. Galeae long, upper surface shiny, unshagreened, hairs sparse; maxillary palpae not visible. Flagellar segments elongate, last segment about one and one-half times as long as broad; segments 3–9 one and one-third to one and one-half times as long as broad; segment 2 as long as broad and segment 1 about one and one-half times as long as segment 2. Supraclypeal area with small round crowded punctures, surface shiny. Vertex with flattened lateral areas with minute round punctures separated mostly by half to one puncture width, surface moderatelydulled by fine shagreening. Genal area narrower than eye in profile, with minute crowded punctures, surface shiny, unshagreened or weakly so. Mesoscutum with small round punctures separated mostly by half a puncture width or slightly less except in small posteromedian area where some spaces equal one puncture width, surface shiny, unshagreened. Scutellum similar but punctures sparse only near apical margin. Propodeum with dorsal surface with small obscure punctures separated by one puncture width or more except in impunctate midline, surface dulled by fine tessellation, posterior surface impunctate medially, with small punctures laterally, surface moderately shiny, finely shagreened. Mesepisternum with round punctures separated by half to one puncture width, surface moderately dulled by reticular shagreening. Metasomal tergum 1 with basal area with minute punctures separated by 2 to 3 puncture widths medially, crowded laterally, surface dulled by fine shagreening, apical area impunctate, moderately shiny. Terga 2–4 with basal, interband, and apical areas with minute punctures separated by 2 to 3 puncture widths, surfaces moderately dulled by fine shagreening basally, shiny in apical areas. Pygidial plate V-shaped with acute apex, surface shiny. Sterna 2–5 with basal areas with small punctures crowded laterally and sparse basomedially; apical areas narrow, impunctate, moderately dulled by fine shagreening.
Vestiture.- White to ochraceous except as follows: metasomal tergum 1 with apical area with short dark brown hairs apicolaterally; terga 2–4 with white tomentum at extreme bases, interband zones largely with erect to suberect black to dark brown hairs; apical areas with short dark brown, relatively simple hairs except narrow apical fringe of short, plumose white hairs, the last becoming progressively broader posteriorly; tergum 5 with chocolate-brown hairs except large white lateral patches; tergum 6 with hairs dark brown. Sterna 2–3 with apical long hairs white, basal hairs ochraceous; sterna 4–5 with basal hairs reddish brown; entire sternum 6 dark brown; scopal hairs long, largely simple but roughened, a few weakly plumose hairs along posterior margin as in davidsoni; inner surfaces tarsi yellow.
MALE. Measurements and Ratios.- N = 2; length, about 13 mm; width, about 4 mm; wing length, 3.40–3.42 mm; hooks in hamu- lus, 14–15 mm; flagellar segment 2/1, 3.07– 3.38.
Integumental Color.- Black except as follows: mandible as in female; labrum entirely white; clypeus entirely cream-colored; flagellum black below; wing membranes, veins, and tegulae as in female; metasomal terga black basally, apical areas piceous or dark reddish brown; sterna as in female; distitarsi dark reddish brown to ferruginous.
Structure.- Clypeus strongly protuberant, with sparse small punctures, surface shiny, unshagreened; oculoclypeal minimum space short (shorter than in female). Galea shiny above, sparsely punctate; maxillary palpal segments 5, in ratio of about 0.9:1.0:1.0:0.6:0.6. Supraclypeal area impunctate medially, minutely punctate laterally, surface shiny. Sculpture of head otherwise as in female. Antennae very long, reaching metasomal tergum 3 in repose; flagellar segment 2 at least three times as long as minimum length of segment 1; segments 3 or 4 to 10 weakly nodose. Mesoscutum as in female but moderately dulled by reticular shagreening; scutellum as in female but shiny only anteriorly; mesepisterna as in female; propodeum as in female but dorsal surface obscurely rugulose laterally as well as minutely punctate. Metasomal terga 1–6 sculptured much as in female terga 1–5 but interband zone with punctures slightly sparser. Pygidial plate about one and one-half times as long as broad, blunttipped, with distinct apicolateral notches, surface with crowded punctures but moderately shiny. Sterna 2–5 with basal areas sparsely punctate, apical areas impunctate, surfaces shiny, weakly shagreened. Sternum 6 (Fig. 171) with apicolateral carinae ending abruptly near midline sulcus but not toothed; lateral margins of sternum not strongly toothed as in davidsoni, but with weakly formed, rounded teeth; strongly shouldered laterally along apical margin.
Terminalia (Figs. 171–175) similar to helianthorum (Figs 126–130) but sternum 7 (Fig. 172) with apicomedian plates extremely extended into long narrow fingerlike projections with few apical hairs; sternum 8 (Fig.173) with sparse hairs. Gonostylus and genital capsule as drawn (Figs. 174 and 175).
Vestiture.- Generally white except as follows: metasomal tergum 1 with long white hairs; terga 2–4 similar to female terga 2–4 but without apical white fringes and interband zones with sparse white tomentum; sternum 5 sparsely covered by white tomentum; sternum 6 with long white hairs. Sterna 2–3 with long, sparse, white hairs; sterna 4–5 with long white hairs except apicomedially becoming reddish brown; sternum 6 with abundant short white hairs basally and minute pale hairs along apical margin (apical to apicolateral carinae).
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