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

Andrena tegularis, andrenine bee
© Copyright John Ascher, 2006-2014 · 6
Andrena tegularis, andrenine bee

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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. tegularis is a small species from Arizona related to A. simulata. Both sexes of tegularis can be readily distinguished from simulata by the coarser and more abundant punctures throughout most of the body surface, but especially by the fact that the tegulae bear small distinct punctures throughout. In addition, the male terga are unhanded and somewhat reflexed apically and both sexes have the wings moderately infumate and darker than in simulata.

FEMALE. MEASUREMENTS AND RATIOS. N = 3; length, 10-12 mm; width, 2.5-3.5 mm; wing length, M = 3.49 0.530 mm; FL/FW, M = 1.18 0.032; FOVL/FOVW, M = 2.67 0.092.

INTEGUMENTAL COLOR. Black except as follows: mandibles with apical half rufescent; flagellar segments 4-10 dark reddish-brown below; tegulae dark rufescent to blackish-brown; wing membranes hyaline, moderately infumate, brownish-yellow, veins dark reddish-brown to black; terga 1-4 broadly hyaline apically, yellowish; distitarsi dark rufescent; hind basitarsi yellow basally; tibial spurs yellow.

STRUCTURE. Antennae moderately long, scape distinctly longer than flagellar segments 1-3; flagellar segment 1 equal in length to segments 2-4; segments 2-4 subequal to each other (holotype), or (4 extremely slightly longer, and each distinctly shorter than segment 5. Eye almost lour times as long as broad, inner margins parallel or converging extremely slightly toward mandibles. Malar space, mandible and galea as in simulata. Maxillary palpus as in simulata but segmental ratio about 1.1:1.0:0.6:0.5:0.5:0.6. Labial palpus as in simulata but first segment rather abruptly broadened shortly above base, segmental ratio about 2.5:1.0:0.8:1.3. Labral process trapezoidal in outline, about three times as broad as long, apical emargination shallow, inconspicuous. Clypeus as in simulata but punctures somewhat coarser, in holotype not much flattened and median area not impunctate but with sparse round punctures, in paratypes flattened, impunctate, median area present, surface shiny, unshagreened except peripherally (holotype) or with sparse fine transverse shagreening. Supraclypeal area as in simulata. Genal area slightly broader than eye in profile, with small deep, round punctures separated mostly by half a puncture width or less, surface shiny, slightly shagreened. Vertex above lateral ocellus equals about one ocellar diameter; with crowded punctures above ocelli, scattered punctures laterally, surface dulled by fine tessellation. Face above antennal fossae with fine longitudinal rugulae rather widely spaced and converging towards ocelli, interrugal spaces with large punctures, surface moderately shiny; space between lateral ocellus and facial fovea and just above fovea irrugulose but with small, round, crowded punctures. Facial fovea deep, short, extending below not quite to level of upper margin of antennal fossae, slightly narrow in lower halt and rounded below, bluntly pointed toward lateral ocellus above, separated from ocellus by almost one ocellar diameter.

Pronotum normal, with abundant, deep, round punctures and reticular shagreening dulling surface. Mesoscutum with round, almost contiguous punctures and fine irregular shagreening dulling surface; parapsidal line of moderate length, slightly longer than from its lower end to margin of scutum. Scutellum similar 10 mescutum but punctures slightly more discrete, separated by half a puncture width or less, surface moderately shiny, irregularly shagreened. Tegulae with small, distinct, round punctures separated mostly by about half a puncture width or slightly more over entire surface, surface slightly dulled by fine reticular shagreening. Metanotum sculptured as in mesoscutum. Propodeum with dorsal enclosure with sides straight, interior roughened by irregular, anastomizing rugulae and dulled by line tessellation; dorsolateral and posterior surfaces with coarse punctures, crowded above, and fine tessellation; corbicular area with several small round punctures, especially anterodorsally, surface moderately shiny, with coarse reticular shagreening. Mesepisternum with coarse, almost contiguous, elongate punctures and fine tessellation dulling surface. Metepisternum similar to corbicular area below, finely punctate and tessellate in upper third. Middle basitarsus with evenly curved sides, slightly broader medially than hind basitarsus. Fore wing with venation as in simulata. Claws and tibial spurs normal.

Metasomal terga 1-4 with apical areas narrowly impunctate, basal areas with deep round punctures separated mostly by half a puncture width or less, slightly more crowded near impunctate apical areas; tergum 1 with punctures slightly less crowded but of same size as on succeeding terga. Pygidial plate V-shaped with slightly raised internal triangular area, apex moderately acute; Sterna 2-5 as in simulata but surfaces moderately dulled by fine reticular shagreening.

Vestiture: Generally as in simulata with the following differences: tergum 2 with apical fascia interrupted medially by about one-third its width; tergum 3 extremely narrowly interrupted medially; tergum 6 with long brown hairs except laterally. v Male. MEASUREMENTS AND RATIOS. N = 5; length, 9-10 mm; width, 2.0-2.5 mm; wing length, M = 3.23 0.245 mm; FL/FW, M = 1.20 0.012; FS1/FS2, M = 2.25 0.072.

INTEGUMENTAL COLOR. Black except as follows: mandible with apical third to one-half rufescent; flagellar segments 3 to 11 dark reddish-brown below; tegulae piceous, reddish-brown to black; wing membranes hyaline, moderately infumate, brownish-yellow, veins dark brown to black; tergal apices broadly hyaline, narrowly rufescent basad of hyaline areas; sternal apices narrowly hyaline; distitarsi slightly rufescent; basitarsi dark reddish-brown to dark red.

STRUCTURE. Antennae of moderate length, reaching rear margins of tegulae; scape equals about first two and one-half flagellar segments; flagellar segment 1 about as long as segments 2 plus 3, segment 2 distinctly shorter than 3 and 3 subequal to 4, segments 3-10 longer than broad. Eye about three times as long as broad, inner margins converging towards mandibles. Malar space as in female. Mandible as in female but lacking basoventral angle; subgenal coronet absent. Galea as in female. Maxillary palpus as in female but segmental ratio about 1.0:0.6:0.5:0.4:0.4:0.6. Labial palpus as in female but ratio about 2.6:1.0:0.8:1.4. Labral process as in female but apical emargination broader and appearing bluntly bidentate. Clypeus as in female but punctures seem slightly larger and deeper, median impunctate area variable as in female. Supraclypeal area as in female. Genal area not quite as broad as eye in profile, sculptured as in female. Vertex and face above antennal fossae as in female but longitudinal rugulae less distinct.

Thorax as in female with the following differences: scutellum with crowded punctures as in mesoscutum; tegular punctures larger and deeper than in female; propodeum with dorsal enclosure roughened throughout by irregularly anastomizing rugulae, dorsolateral and posterior surfaces with large punctures contiguous, lateral surfaces with abundant, contiguous, shallow punctures and fine shagreening; mesepisternal punctures small, round, deep, separated by about half a puncture width, surface dulled by fine tessellation. Fore wing venation as in female. Claws and tibial spurs normal.

Terga 1-5 sculptured as in female with the following differences: punctures slightly larger and deeper; apical areas depressed slightly basally with margins moderately reflexed. Pseudopygidial area not evident. Sterna 2-5 as in female. Stein urn 6 flat, apical emargination shallow, broadly V-shaped.

Genitalia and sterna 7 and 8 (Figs. 209-213) similar to those of simulata, except as follows: penis valves thicker and blunter apically and broader basally; dorsal lobe of gonocoxites much longer with apex turned outwards; sternum 8 with apex more rounded.

VESTITURE. Generally as in simulata except as follows: thoracic dorsum with hairs sparse; sterna 3-5 with short, white, subapical fimbriae.

TYPE MATERIAL. The holotype female from the Santa Rita Mountains, Arizona, from the Bryant collection (Lot 51), October 5, 1936, and the allotype male from the Santa Rita Mountains, Arizona, Bryant collection (Lot 237), September 10, 1933, are the property of the California Academy of Sciences. Two female and tour male paratypes (AMNH; PHT; USU) from Arizona are as follows: Rustlers Park, Chiricahua Mts. 1 male, September 5, 1950, W. Gertsch and M. A. Caxier; 1 female, September 5, 1962, J. G. Rozen, M. Statham and S. J. Hessel. Chiricahua Mts., Cochise Co. 1 female, September 28, 1960, on Heliopsis sp., G. E. Bohart. Madera Canyon, Santa Rita Mts. 3 males, September 27, 1952, N. A. Lewis and E. R. Tinkham.

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