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. duplicata is the only species of the aureocincta group of Callandrena to occur in eastern United States. It is related to simulata in the yellow male clypeus, but differs in both sexes from simulata in the denser shagreening or tessellation of the thoracic dorsum and the darker integument of the terga and legs as described below. The female of duplicata has the hair of the thoracic dorsum dense and hiding the surface as in amarilla but has the facial foveae shorter as in simulata. The male differs from that of simulata in the shortness of the first flagellar segment.
FEMALE. MEASUREMENTS AND RATIOS. N = 19; length, 9-11 mm; width, 2.5-3.5 mm; wing length, M = 3.22 ą 0.124 mm; FL/FW, M = 1.16 ą 0.005; FOVL/FOVW, M = 2.93 ą 0.056.
INTEGUMENTAL COLOR. Black except as follows: mandible mostly dark rufescent; flagellar segments 3-10 dark brown below; tegulae testaceous; wing membranes slightly infumate, especially apically near anterior margins, veins blackish-brown to dark reddish-brown; terga 1-5 broadly hyaline apically, yellowish, basally slightly rufescent; sterna 2-5 narrowly hyaline apically, rufescent basally; distitarsi rufescent (not orange); hind basitarsi piceous to somewhat rufescent; hind tibiae piceous; tibial spurs pale yellow.
STRUCTURE. Antennae of moderate length, scape slightly longer than flagellar segments 1-3; flagellar segment 1 about equal in length to segments 2 plus 3; segment 2 equal to 3 in length and shorter than 4; segment 4 as long as broad; segments 5-10 longer than broad. Eye about four times as long as broad, inner margins parallel. Malar space, mandible and galea as in simulata. Maxillary palpus as in simulata but segmental ratio about 1.0:1.1:0.6:0.6:0.5:0.8. Labial palpus as in simulata but segmental ratio about 2.2:1.0:0.7:1.2. Labral process short, three to four times as broad as long, entire or with minute median emargination. Clypeus as in simulata except lateral punctures smaller, separated mostly by halt to one puncture width and surface often with extremely fine reticular shagreening but scarcely dulled. Supraclypeal area with minute crowded punctures and reticular shagreening dulling surface. Genal area slightly broader than eye in profile, with minute punctures near eye separated by one puncture width, posteriorly by two to three puncture widths, surface shiny and unshagreened near eye, moderately dulled posteriorly by reticular shagreening. Vertex above lateral ocellus equals one ocellar diameter or slightly less, sculptured as in simulata. Face above antennal fossae with longitudinal rugulae reaching ocelli and abundant interrugal punctures, moderately shiny. Facial fovea short, not extending to level of upper margin of antennal fossae, rounded above, separated from lateral ocellus by three-fourths of an ocellar diameter or slightly less.
Pronotum normal, with minute punctures crowded above, sparse laterally, and fine reticular shagreening. Mesoscutum with small round punctures separated by halt to one puncture width, surface moderately dulled by fine reticular shagreening to opaque and coarsely shagreened or finely tessellate; parapsidal line moderately long, about as long as from its posterior tip to margin of scutum. Tegulae impunctate. Scutellum sculptured as in mesoscutum. Metanotum like scutellum but punctures contiguous. Propodeum with dorsal enclosure slightly roughened mediobasally, tessellate; dorsolateral and posterior surfaces with small round punctures separated mostly by two to three puncture widths, tessellate; corbicular area moderately shiny, with few punctures anteriorly and dorsally and coarse reticular shagreening. Mesepisternum with large round punctures separated by halt to one puncture width, sparser posteriorly, surface moderately to completely dulled by fine shagreening. Metepisternum as in simulata. Middle basitarsus as in simulata slightly broader than hind basitarsus medially. Fore wing venation as in simulata except second submarginal cell only slightly less than half as long as first. Claws and tibial spurs normal.
Metasomal terga 1-5 with apical areas impunctate, shiny, with coarse sparse reticular shagreening. Tergum 1 with basal area punctures minute, separated mostly by three to five puncture widths, less laterally, surface moderately dulled by reticular shagreening. Terga 2-5 basally with small to minute punctures separated mostly by one to two puncture widths, surface moderately dulled by reticular shagreening. Pygidial plate V-shaped, with well-rounded apex and distinctly raised internal triangle. Sterna 2-5 as in simulata but shagreening slightly denser.
VESTITURE. Generally as in simulata with the following differences: thoracic dorsum with hairs yellowish to fox-red, relatively short, dense and hiding surface; tarsi without brown hairs; inner surfaces basitarsi pale yellow.
MALE. MEASUREMENTS AND RATIOS. N = 3; length, 7-9 mm; width, 1.5-2.5 mm; wing length, M = 2.87 ą 0.549 mm; FL/FW, M = 1.16 ą 0.053; FS1/FS2, M = 1.26 ą 0.007.
INTEGUMENTAL COLOR. Black except as follows: mandible entirely dark rufescent; clypeus bright yellow except apical margin, extremely lateral angles, and small maculae mesad and below tentorial pits; flagellar segments 2ó11 dark reddish-brown below; tegulae testaceous; wing membranes hyaline, veins dark brown; terga 1-5 broadly hyaline apically; sterna 2-5 narrowly hyaline apically, dark rufescent basally; tarsi including hind basitarsi piceous with segments with rufescent tips to orange; hind tibiae piceous to slightly rufescent; tibial spurs pale yellow.
STRUCTURE. Antennae long, reaching well beyond tegulae in repose; scape length equals slightly more than flagellar segments 1 plus 2; flagellar segment 1 about equal in length to segment 3, longer than segment 2; segment 3 subequal to segment 4; segments 3-11 longer than broad. Eye about three and one-fourth times as long as broad, inner margins converging towards mandibles. Malar space as in female. Mandible as in female but lacking basoventral angle and subgenal coronet. Galea as in female. Maxillary palpus as in female but segmental ratio about 1.0:1.0:1.0:0.9:0.7:1.2. Labial palpus as in female but segmental ratio about 1.8:1.0:0.8:1.2. Labral process trapezoidal, two and one-half to three times as broad as long, with shallow median emargination. Clypeus as in female but less flattened, impunctate area larger, punctures smaller. Supraclypeal area as in female. Genal area as broad as eye in profile, sculptured as in female. Vertex above lateral ocellus slightly shorter than one ocellar diameter, sculptured as in female. Face above antennal fossae as in female but rugulae less distinct.
Thoracic structure and sculpturing as in female with the following differences: mesoscutum, scutellum and mesepisternum usually moderately shiny, shagreening weak; propodeal dorsal enclosure more coarsely rugulose mediobasally; propodeal lateral surfaces dulled by coarse reticular shagreening and with punctures scattered throughout. Venation as in female. 8
Terga 1-5 with apical areas impunctate apically, with extremely-minute sparse punctures near bases, shiny, shagreening extremely, weak if present; basal areas with small round punctures separated mostly by two to three puncture widths (slightly sparser on tergum 1), surfaces shiny, unshagreened or only delicately so. Pseudopygidial area not evident. Sterna 2-5 sculptured as in female but punctures extremely sparse basally. Sternum 6 as in simulata.
Genitalia and sterna 7 and 8 (Figs. 239-242) similar to those oĢ hondurasica but gonoforceps with inner apical margin less truncate and penis valves narrower.
VESTITURE. Generally as in simulata except as follows: tergum 3 with pale apical fascia narrowly interrupted medially and terga 4 and 5 with pale apical fasciae weak.
TYPE MATERIAL. The holotype (NCSU) female and allotype (NCSU) male of duplicata from Marion, North Carolina, were collected August 29, 1929, by T. B. Mitchell.
DISTRIBUTION. A. duplicata is known to occur from North Carolina north to New Jersey and west to northeastern Missouri. It has been collected from August 15th through October 29th. In addition to the holotype and allotype, 22 females and 4 males (including 22 female and 2 male paratypes) have been examined from localities listed below.
ILLINOIS: Urbana. MISSOURI: Hannibal. NEW JERSEY: Englewood. NORTH CAROLINA: Cedar Mt.; Marion; Swannanoa. OHIO: Jackson Co.
FLORAL RECORDS. Few floral records exist so that one cannot make a statement regarding flower preferences at this time other than that this bee seems to prefer plants of the family Compositae. A. duplicata has been taken from flowers of the following plants: Bidens coronata, Helianthus sp., H. divaricatus, H. grosse-serratus, Solidago sp.
Reprinted with permission from: Mitchell, T.B. 1960. Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 141.
FEMALE Length 9 mm.; face somewhat longer than broad; clypeus projecting fully one-half below suborbital line, median portion rather flat, smooth and shining, with a rather broad, distinct, median, impunctate line, punctures on each side rather coarse, deep, well separated but not sparse; facial foveae short and narrow, occupying above about half of space between eyes and ocelli, covered with fulvous tomentum; space between margin of vertex and lateral ocelli subequal to their diameter; cheeks slightly broader than eyes, rounded posteriorly, somewhat shining, very minutely and obscurely punctate; malar space short; basal segment of flagellum subequal to 2nd and 3rd combined; process of labrum broad and extremely short, transversely linear, mandibles robust and elongate, with a large, inner, subapical tooth and with a rounded, subbasal, inferior dilation, overlapping about one-third; pubescence of head, thorax laterally and below, and legs, ochraceous, that on dorsum of thorax rather short, dense, bright fulvous; thoracic integument somewhat shining, punctures of scutum and scutellum very fine and close, obscured by the dense pubescence; pleura somewhat shining, with rather coarse, deep and distinct punctures, close anteriorly, becoming rather sparse posteriorly; dorsal area of propodeum narrow, oblique, triangle dull, finely tessellate; propodeal corbicula rather well developed, with a thin anterior fringe, pale ochraceous; trochanteral floccus rather well developed, pale ochraceous, hind tibiae slightly broadened apically, apex not quite twice width of basitarsi, pale ferruginous, scopa rather dense, hairs finely plumose, entirely pale ochraceous; front basitarsi slightly narrower than their tibiae, mid basitarsi about equal to their tibiae in width; 2nd submarginal cell considerably shorter than 3rd, receiving 1st recurrent just beyond middle: abdominal terra smooth. somewhat shining, punctures very-minute, shallow and obscure, rather close laterally, becoming sparse medially, apical depressed areas shallow, but rather broad, occupying more than one-third median length of discs, reddish-hyaline, becoming more clear hyaline along rims, discal pubescence extremely short, sparse and obscure, apparently pale in general, terga 2-4 with ochraceous apical fasciae, that on 2 and 3 more or less interrupted medially, tergum 5 with a pale ochraceous apical fimbria.
MALE Length 8 mm.; face somewhat longer than broad; clypeus slightly convex, projecting fully one-half below suborbital line, yellow except for a pair of small, dark spots and the dark, apical rim, smooth and shining, with an obscure, median, impunctate line, punctures on each side deep, rather coarse, becoming close at sides; space between margin of vertex and lateral ocelli subequal to their diameter; cheeks subequal to eyes in width, rounded posteriorly, somewhat shining, punctures exceedingly minute and obscure: malar space lacking; 1st segment of flagellum subequal to 3rd segment, 2nd somewhat shorter; process of labrum broad and very short, broadly subtriangular, apex slightly emarginate; mandibles of moderate length, with a distinct inner subapical tooth, overlapping about one-third; pubescence of head, thorax and legs entirely ochraceous; thoracic integument somewhat shining, punctures of scutum and scutellum very fine and close, becoming slightly separated near center of scutum posteriorly; pleura shining, with deep, distinct punctures, quite close anteriorly, becoming more widely separated posteriorly; dorsal area of propodeum oblique, triangle tessellate, very narrowly substriate along basal margin; basitarsi pale testaceous, slender and elongate, considerably narrower than their respective tibiae; 2nd submarginal cell much shorter than 3rd receiving 1st recurrent near apex; abdominal terga smooth and shining, very finely punctate, punctures rather close and evenly distributed, apical impressed areas shallow, rather narrow, quite distinctly and rather broadly yellowish-hyaline along rims, discal pubescence thin and obscure, erect, entirely pale, terga 2-4 with obscure, pale ochraceous, apical fasciae, more evident laterally, widely interrupted on tergum 2 medially; apical portion of sternum 8 rather short and slender, the tip more broadly dilated, broadly rounded, not at all protuberant beneath, covered with thin, pale pubescence; penis valves slender for most of the length, not appreciably dilated toward base, gonocoxites short and quite slender, slightly dilated at apex, gonocoxal lobes very slightly produced, broadly rounded.
TYPES - Holotype: Female, Marion, N. C., Aug. 29, 1929 (Mitchell). Allotype: topotypical. [both author's coll.]. Paratypes: NORTH CAROLINA: 2 FF, 1 M, topotypical; 1 M, Marion, Aug. 27, 1930; 1 F, Marion, Aug. 30, 1931 (all Mitchell); 1 F. Cedar Mt., Aug. 15, 1957 (D. A. Young.). OHIO: 1 F, Jackson Co., Sept. 11, 1929 (C. H. Kennedy.) The types and the North Carolina paratypes are in the author's collection, the Ohio specimen in the collection of Ohio State University.
Andrena (Pterandrena) duplicata Mitchell, 1960, North Carolina Agricultural Experiment Station Technical Bulletin of the, No. 141, pp. 144-145.
Updated: 2017-06-24 15:52:49 gmt