Smithsonian Institution, Entomology Department · 1
Andrena barberi, face
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Smithsonian Institution, Entomology Department · 1
Andrena barberi, side
Smithsonian Institution, Entomology Department · 1
Andrena barberi, top
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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This large species is the first of a series of species in which the propodeal corbicula is without an anterior fringe of hairs, with a long dorsal fringe and with the interim completely free of hairs except occasionally for a few near the dorsal margin in the posterior half. A. barberi is distinctive within this group in both sexes by the large size of the longitudinal posterior propodeal sulcus as described below.
FEMALE. MEASUREMENTS AND RATIOS. N = 17; length, 12.5-14.0 mm; width, 3.0-4.5 mm; wing length, M = 4.30 ± 0.127 mm; FL/FW, M = 1.04 ± 0.005; FOVL/FOVW, M = 3.32 ± 0.035.
INTEGUMENTAL COLOR. Black except as follows: mandibles with apical thirds rufescent; flagellar segments 3 or 4 dark reddish-brown below; wing membranes slightly infumate apically, veins brownish-black to dark reddish-brown; terga 1-4 occasionally extremely narrowly hyaline apically; sterna 2-5 usually extremely narrowly hyaline apically, just basad of hyaline margins dark rufescent; distitarsi usually rufescent; tibial spurs yellow.
STRUCTURE. Scape length equal to flagellar segments 1-3; flagellar segment 1 slightly longer than segments 2 through 4, segments 2 and 3 subequal in length and slightly shorter than 4. Eye about three and one-half times as long as broad; inner margins parallel. Malar space linear. Mandibles short, outer mandible in repose extends beyond middle of labrum by about one-fourth mandibular length or slightly more, bidentate apically; ventrobasal lamella absent; subgenal coronet present. Galea as in helianthi. Maxillary palpus as in helianthi but segmental ratio about 1.0:0.9:0.7:0.7:0.7:0.9. Labial palpus as in helianthi but segmental ratio about 2.1:1.0:0.8:1.0. Labral process about half as long as wide at base or longer, distinctly emarginate apically, almost bidentate. Clypeus evenly rounded from side to side, extending beyond ends of eyes by about one-third its length; punctures round, small, absent or sparse along midline, laterally irregularly spaced but separated by half to one puncture width, surface dulled by reticular shagreening. Supraclypeal area dulled by minute crowded punctures and fine shagreening. Genal area slightly broader than eye in profile, with small to minute punctures crowded near eye margin, posteriorly separated by one to two puncture widths, surface shiny near eye, dulled posteriorly by reticular shagreening. Vertex above lateral ocellus equals one ocellar diameter or slightly more; with crowded punctures above ocelli sparse laterally, with several minute rugulae following contour of upper end of foveae, surface dulled by (me tessellation. Face above antennal fossae with longitudinal rugulae reaching ocelli and between lateral ocellus and facial fovea, interrugal spaces with punctures abundant below, sparse above, surface dull to moderately shiny, finely shagreened. Facial fovea shallow, long, extending below at least to upper margin of clypeus, rounded below, rounded above and separated from lateral ocellus by more than half diameter of lateral ocellus.
Pronotum normal, with small punctures separated mostly by one to two puncture widths, sparser anteriorly, surface dulled by coarse reticular shagreening. Mesoscutum opaque, finely and densely tessellate, punctures obscure, sparse, extremely shallow, small. Scutellum similar but punctures slightly more distinct. Metanotum similar but tessellation coarser. Propodeum with dorsal enclosure with sides straight, tessellate with fine irregular rugulae mediobasally; dorsolateral and posterior surfaces with minute shallow punctures separated mostly by two to three puncture widths, tessellate, median longitudinal sulcus large, deep, with almost carinate lateral borders, at least half as broad as long; corbicular surface moderately shiny, coarsely and regularly tessellate. Mesepisternum with minute round punctures separated mostly by two puncture widths, sparser posteriorly, surface opaque, tessellate. Metepisternum shiny and coarsely tessellate below, upper third finely tessellate with minute crowded punctures. Tegulae impunctate. Fore wing venation as in helianthi. Middle basitarsus narrower than hind medially, parallel-sided. Claws and tibial spurs normal but posterior hind spur with posterior flange slightly expanded.
Metasomal terga 1-4 opaque, densely and finely tessellate, apical areas with minute crowded obscure punctures, basally with sparse, extremely shallow and obscure punctures. Pygidial plate V-shaped with apex truncate (rounded when eroded), without raised internal triangle. Sternum 2 with scattered punctures except in narrow apical area. Sterna 3-5 with basal halves impunctate, apical halves with small punctures separated mostly by one to two puncture widths except narrow impunctate apical margins.
VESTITURE. Ochraceous except as follows: vertex with dark brown hairs; mesoscutum and scutellum with dark brown medially, mesoscutal dark patch extending anteriorly beyond level of anterior margins of tegulae and laterally to parapsidal lines; terga 5 and 6 with brown hails; sterna 3-6 with brown hairs basally, 3-5 with subapical fimbriae white; inner surfaces tarsi pale yellow.
Metasomal tergum 1 with sparse long white hairs; terga 2-4 with apical fasciae of sparse white decumbent pubescence, usually broadly interrupted medially on tergum 2 and narrowly interrupted or weak medially on tergum 3. Propodeal corbicula without anterior fringe, with dorsal fringe of long plumose hairs, without interior hairs except, occasionally, a few long plumose hairs near dorsal fringe in posterior half. Trochanteral flocculus and scopal hairs as in helianthi.
MALE. MEASUREMENTS AND RATIOS. N = 8; length, 10-13 mm; width, 2.5-3.5 mm; wing length, M = 3.87 ± 0.183 mm; FL/FW, M = 1.08 ± 0.007; FS1/FS2, M = 2.01 ± 0.026.
INTEGUMENTAL COLOR. Black except as follows: mandible with apical third rufescent; clypeus yellow except dark apical margin, dark maculae below and mesad of tentorial pits, extreme lateral angles and often extremely narrow posterior margin black; flagellar segments 3-11 dark red below; wing membranes hyaline, moderately infumate apically, veins dark reddish-brown to black; terga 1-5 slightly rufescent apically; sterna 2-5 rufescent to black, translucent red to yellow apically; distitarsi dark rufescent; tibial spurs testaceous.
STRUCTURE. Antennae short, in repose extending back just beyond tegulae; scape length equals slightly less than first two flagellar segments; flagellar segment 1 slightly shorter than segment 2 plus 3; segment 2 distinctly shorter than 3 which is slightly shorter than 4; segments 3-11 longer than broad. Eye slightly longer than three times as long as broad, inner margins parallel or converging slightly towards mandibles. Malar space, mandible and galea as in female. Maxillary palpus as in helianthi but segmental ratio about 1.0:0.9:0.8:0.7:0.7:1.0. Labial palpus as in helianthi but segmental ratio about 2.7:1.0:0.9:1.5. Labral process, clypeus, supraclypeal area and genal area as in female. Vertex and face above antennal fossae as in female but facial rugulae fill space between lateral ocellus and eye.
Thoracic sculpturing as in female except as follows: mesoscutal and scutellar punctures slightly larger and more distinct; propodeum with dorsal enclosure with basal rugulae slightly more extensive and with lateral surface dull, with sparse punctures throughout. Wing venation as in helianthi. Claws and tegulae normal. Tibial spurs as in female.
Terga 1-5 sculptured as in female terga 1-4 but basal areas with distinct minute punctures separated irregularly by two to five puncture widths. Pseudopygidial area evident, extremely narrow. Sterna 2-5 sculptured as in female but tessellation denser, dull. Sternum 6 flat, with a deep apical V-shaped emargination.
Sternum 7 (Fig. 113) similar to that of braccata but median emargination much deeper. Sternum 8 (Fig. 112) much as in braccata. Genital capsule (Figs. 109-111) as in helianthi but note knobbed and extremely long gonoforceps, the extremely slender penis valves, the long pointed dorsal lobes of gonocoxites and the relatively sparse hairs.
VESTITURE. Generally as in female with the following differences: mesoscutal and scutellar dark patches reduced in size; terga 2 and 3 with apical fasciae complete but weak medially or narrowly interrupted; terga 6 and 7 with golden-brown to dark brown hairs, paler laterally; sterna 3-5 without clear subapical fimbriae, subapical hairs decumbent, about same length as more basal hairs; inner tarsal hairs orange to yellow; outer tarsal and tibial hairs often golden.
TYPE MATERIAL. The holotype female of A. barberi from Ruidoso Forks, New Mexico was collected by C. M. Baker, July 30, 1898, on Prunus sp. (USNM No. 4334).
DISTRIBUTION. A. barberi is known from New Mexico and Mexico. It has been collected from June 29th through November 13th, but chiefly during August. In addition to the holotype, 26 females and 26 males have been examined from the localities listed below.
NEW MEXICO: Eagle Creek (South Fork), White Mts.; Ruidoso Forks; White Mts. Mexico. DURANGO: Coyotes; Otinapas; Palos Colorados. GUADALAJARA: Guadalupe. GUANAJUATO: Guanajuato (8 miles N.). HIDALGO: Pachuco; Tulancingo (4 miles E. and 7 miles S.). M£XICO: Atlacomuko (22 miles N.); Toluca (25 miles N.W.). PUEBLA: Huachinango (8 miles W.); Zacatlan (6, 20 & 23 miles N.W.). TLAXCALA: Apizaco (10 miles N.). VERA CRUZ: Jalapa (13 miles N.W.); Rio Blanco.
FLORAL RECORDS. The records of flower visits for A. barberi are scarce. The holotype was taken on Prunus sp., but, due to the lateness of the season that it was collected, one wonders whether the specimen was correctly labeled or not. Other flower data indicate that barberi is an oligolege on flowers of the family Compositae, although a single male was taken on Argemone (Papaveraceae). Flowers from which barberi has been collected are listed below.
Argemone sp., Bidens triplinervia var. macrantha, Heterotheca sp., Prunus sp. (?), Rudbeckia laciniata, Solidago trincruala.
Andrena barberi Cockerell, 1898, Annals of the Magazine of Natural History, ser. 7, vol. 2, p. 448; 1931, American Museum Novitates, No. 458, p. 14.
Andrena (Pterandrena) barberi: Lanham, 1949, University of California Publications in Entomology, vol. 8, p. 200.
Updated: 2021-05-13 13:47:22 gmt