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Andrena auripes LaBerge, 1967
Life   Insecta   Hymenoptera   Apoidea   Andrenidae   Andrena
Subgenus: Callandrena

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Reprinted with permission of the University of Nebraska State Museum from:
LaBerge, W. E. 1967. A revision of the bees of the genus Andrena of the Western Hemisphere. Part I. Callandrena (Hymenoptera: Andrenidae). Bulletin of the University of Nebraska State Museum 7: 1-316.

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A. auripes is similar to and closely related to A. sodalis. Both sexes of auripes differ from sodalis by the shiny, unshagreened terga and sterna. In addition the male of auripes has the first flagellar segment longer than segments two and three together, whereas in sodalis segment one is shorter than segments two and three. A. auripes resembles sodalis and differs from simulata in that the mesoscutum is opaque, dulled by fine dense tessellation.

FEMALE. MEASUREMENTS AND RATIOS. N = 3; length, 10-11 mm; width, 3.0-3.5 mm; wing length, M = 3.60 0.442 mm; FL/FW, M = 1.20 0.308; FOVL/FOVW, M = 2.72 0.153.

INTEGUMENTAL COLOR. Black except as follows: mandible with at least apical half rufescent; flagellar segments 3-10 dark reddish-brown below; wing membrane moderately infumate, yellowish-brown, especially apically, veins dark reddish-brown; tegulae testaceous; terga 1-5 with apices broadly hyaline, yellow to somewhat rufescent; sterna 2-5 apically narrowly hyaline, yellow, basally moderately rufescent; distitarsi bright golden yellow to orange; hind basitarsi with basal half to two-thirds orange; hind tibiae orange.

STRUCTURE. Antennae as in simulata but flagellar segment 1 equal to segments 2-4 together and segments 2-4 subequal in length. Eye almost four times (at least three and three-fourths) as long as broad, inner margins parallel. Malar area, mandible and galea as in simulata. Maxillary palpus as in simulata but segmental ratio about 1.0:0.8:0.8:0.7:0.6:0.8. Labial palpus as in simulata but segmental ratios about 2.1:1.0:0.9:1.1. Labral process as in simulata, Clypeus as in simulata. but median impunctate area narrow and lateral punctures separated mostly by half to one puncture width, surface shiny. Supraclypeal area as in simulata but punctures almost contiguous and surface moderately shiny. Genal area as in simulata except only slightly broader than eye in profile. Vertex short, above lateral ocellus equals about one ocellar diameter, sculptured as in simulata. Face above antennal fossae and facial foveae as in simulata but fovea separated from lateral ocellus by less than three-fourths and more than one-half an ocellar diameter. Thoracic sculpturing, parapsidal lines and tegulae as in sodalis but scutellum slightly to moderately shiny and with distinct punctures. Wing venation, claws and tibial spurs as in simulata.

Metasomal tergum 1 with apical area impunctate, basal area medially with minute, widely separated punctures, laterally punctures larger and separated mostly by two to three puncture widths. Terga 2-4 with apical areas impunctate, basal areas with small round punctures separated by two to three puncture widths medially, somewhat coarser and more crowded laterally; surfaces shiny, unshagreened or extremely finely so. Pygidial plate V-shaped with round apex and slightly raised internal triangle. Sterna 2-5 as in simulata but surfaces with distinct reticular shagreening although not dull.

VESTITURE. Generally as in aureocincta with the following differences: terga 2 and 3 with apical pale fasciae broadly interrupted medially (on tergum 2 by half to three-fifths width of tergum, less on tergum 3); tergum 4 with apical pale fascia narrowly interrupted medially; terga 5 and 6 with hairs golden yellow medially; tarsi with outer surfaces pale ochraceous.

MALE. MEASUREMENTS AND RATIOS. N = 13; length, 8-10 mm; width, 2.0-2.5 mm; wing length, M = 3.15 0.117 mm; FL/FW, M = 1.19 0.013; FS1/FS2, M = 2.40 0.185.

INTEGUMENTAL COLOR. Black except as follows: Mandible with apical half or more rufescent; clypeus yellow except lateral angles, apical margin and dark maculae mesad and below tentorial pits; flagellar segments 3-11 dark brown to black below; tegulae piceous to dark rufescent; wing membranes moderately infumate, brown, especially apically, veins dark reddish-brown to black; terga 1-5 with apices hyaline, narrowly so on tergum 1, yellowish; sterna 2-5 with apices narrowly hyaline, yellowish; distitarsi golden yellow or orange; hind basitarsi yellow to orange; hind tibiae entirely dark, dark with pale subbasal spot and pale apex, orange with submedian brown blotch, or entirely orange (allotype with third alternative); tibial spurs orange.

STRUCTURE. Antennae long, extend beyond tegulae in repose; scape equals first two flagellar segments in length or slightly more; flagellar segment 1 as long as or longer than segments 2 plus 3, segment 3 longer than 2 and slightly shorter than 4; segments 4-11 longer than broad. Eye almost three and three-fourths as long as broad, inner margins converging towards mandibles. Malar space, mandible and galea as in simulata. Maxillary palpus as in simulata but segmental ratio about 1.0:0.9:0.8:0.7:0.5:0.7. Labial palpus as in simulata but segmental ratio about 2.1:1.0:0.7:1.1. Labial process and clypeus as in simulata but surface of clypeus often extremely finely, reticularly shagreened, but surface scarcely dulled. Supraclypeal area, genal area, vertex and face above antennal fossae as in simulata.

Thorax as in female except as follows: scutellum opaque, sculptured like mesoscutum; propodeum with lateral surfaces dulled by coarse tessellation and scattered punctures. Tegulae and wing venation as in female. Claws and tibial spurs normal. Terga 1-5 with apical areas slightly depressed, not reflexed, impunctate, basal areas with coarse round punctures separated mostly by one-half to one puncture width, slightly sparser on tergum 1, surfaces shiny to almost opaque, usually with reticulotransverse shagreening in basal areas but this restricted to extreme base of terga in some specimens. Pseudopygidial area extremely narrow, usually obscured by hairs. Sterna 2-5 with apical areas impunctate, basally with scattered punctures, surfaces moderately dulled by reticular shagreening. Sternum 6 flat, shallowly emarginate medially.

Genitalia and sterna 7 and 8 (Figs. 219-223) similar to those of sodalis but gonoforceps more as in simulata.

VESTITURE. Generally as in simulata with the following differences: usually duller on thoracic dorsum; terga 2 and 3 with apical pale fasciae broadly interrupted medially; sterna 3-5 with distinct subapical fimbriae.

TYPE MATERIAL. The holotype (AMNH) female and the allotype (AMNH) male from Palos Colorado's, Durango, Mexico, were collected by Schranul David Rockefeller Expedition), August 5, 1947. Two female and ten male paratypes (AMNH; INHS; LACM; USNM) from Mexico are as follows: Palos Colorados, Durango: 1 male, same data as in holotype. El Salto (6 miles northeast), Durango: 1 male, August 10, 1947, W. Gertsch (David Rockefeller Expedition). Mexico City, Distrito Federal: 1 female, 1913, Godman-Salvin collection. Meadow Valley, Mexico: 9 males, Townsend collection. Two male paratypes were collected by Mr. L. B. Koenig, August 23, 1959, at Hospital Flat and Riggs Flat, respectively, Graham Mt., Arizona.

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Updated: 2021-05-13 12:31:49 gmt
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