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Andrena pectidis (Cockerell, 1897)
Panurgus pectidis Cockerell, 1897

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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This beautiful small species of Callandrena can be readily separated from the foregoing species as follows: both sexes have large, parocular yellow maculae which in the female extend well above the antennal fossae in narrow lines alongside of the eyes, and bright red abdomens. The female has scale-like hairs on the dorsum of the thorax as in A. manifesta to which it seems to be closely allied.

FEMALE. MEASUREMENTS AND RATIOS. N = 1; length about 9.0 mm; width about 2.5 mm; wing length about 3.10 mm; FL/FW, 1.01; FOVL/FOVW, 2.00.

INTEGUMENTAL COLOR. Black except as follows: clypeus pale yellow with dark apical border and two small dark maculae below tentorial pits; parocular area pale yellow to just above antennal fossa and with a thin pale line extending to top of eye along inner eye margin; supraclypeal area with small median pale spot in specimen before me; mandibles largely rufescent; flagellar segments 3-10 red below; tegulae hyaline, testaceous; wings infumate apically, hyaline basally, veins reddish-brown; metasoma red except brown pygidial plate and small brown lateral round maculae on tergum 2; legs red except coxae, trochanters and femora reddish-brown.

STRUCTURE. Antennae as in manifesta. Eyes about three and three-fourths times as long as broad, inner margins parallel. Malar space, mandibles, subgenal coronet as in manifesta. Hypostomal carina not angulate at apical angle. Galeae as in manifesta. Maxillary palpus as in manifesta, segments in ratio of about 1.0:1.0:1.0; 0.9:0.5:1.1. Labral process as in manifesta. Clypeus rounded, protruding beyond eyes by about one-fourth its length, with deep round punctures separated by one to four puncture widths medially, more crowded laterally, surface shiny, unshagreened. Supraclypeal area with minute round punctures separated mostly by one puncture width, surface shiny, unshagreened. Genal areas almost twice as broad as eye in profile, with minute punctures separated mostly by two puncture widths (less near eye), surface shiny, unshagreened. Vertex short, above lateral ocellus equals about one ocellar diameter, with abundant small punctures becoming sparser near apex of compound eyes. Face above antennal fossae with crowded small deep punctures, surface slightly dulled by irregular shagreening. Facial fovea equals less than half length of eye (about 5:12), rounded above, pointed below near eye margin, deeply impressed.

Pronotum with minute punctures separated by two puncture widths above, becoming impunctate laterally, surface slightly dulled above, shiny and unshagreened laterally. Mesoscutum with small, uniform, round punctures separated by about one-half a puncture width, surface slightly dulled by irregular shagreening. Scutellum similar. Metanotum with punctures more crowded, smaller and shagreening denser. Propodeum with enclosure with many complete transverse rugulae but these extremely fine, slightly dulled by irregular shagreening especially apically and laterally; dorsolateral and posterior areas punctate, shiny; corbicular areas hidden in specimen before me. Mesepisternum with small round punctures separated by one to two puncture widths, surface shiny, unshagreened. Metepisternum impunctate and shiny below. Fore wing with two submarginal cells, venation and pterostigma as in manifesta.. Middle basitarsus narrower than hind, parallel-sided. Tibial spurs and claws normal.

Metasomal tergum 1 with apical area impunctate, not impressed, basal area with small, irregularly-spaced, round punctures, separated by one to four puncture widths, surface shiny, unshagreened. Terga 2-4 similar to tergum 1, but basal area punctures slightly smaller. Tergum 5 with more abundant basal punctures. Pygidial plate narrow, pointed, V-shaped. Sterna 2-6 impunctate medially and basally, with small round punctures near apex and laterally, surface somewhat dulled by reticulotransverse shagreening.

VESTITURE. Generally pale ochraceous in color. Thoracic dorsum with hairs short, erect, blunt, with close-set barbs giving scale-like appearance, but narrow. Tergal hairs sparse, apical fasciae lacking or reduced to sparse lateral patches. Tibial scopal hairs simple to weakly plumose, of normal length. Inner surfaces tarsi with hairs yellow.

MALE. MEASUREMENTS AND RATIOS. N = 1; length about 9.0 mm; width about 2.5 mm; wing length about 2.78 mm; FL/FW, 1.18; FS1/FS2, 1.60.

INTEGUMENTAL COLOR. Generally as in female with the following differences: clypeus with dark maculae below ientoria1 pits absent; parocular areas reach upper margin of antennal fossae where they round off to the eye margin, without narrow extensions along eye margins above; supraclypeal area without pale spot; antennal segments 2-11 reddish below; tergum 1 brownish black in basal hall or slightly more; terga 5-7 black and tergum 4 reddish brown basally, apical areas hyaline; sterna 3-6 infused with brown basad of hyaline apical areas.

STRUCTURE. Antennae slightly surpassing tegulae in repose; scape equal to flagellar segments 1-3; flagellar segment 1 shorter than segments 2 plus 3 and the latter shorter than 4. Eye about three times as long as broad, converging towards mandibles. Malar space, mandibles, galeae, genal areas, vertex, and face as in female. Maxillary palpus exceeds galea by terminal segment, segments in ratio of about 1.4:1.0:1.0:1.0:1.0:1.4. Labial palpus as in female, segments in ratio of about 2.0:0.9:0.6:1.0. Labial process bidentate, slightly reflexed.

Pronotum as in female. Mesoscutum with small round punctures separated by one to two puncture widths, surface shiny, unshagreened. Scutellum similar. Metanotum with smaller, more crowded punctures, surface dulled by irregular shagreening. Propodeum sculptured as in female but enclosure with transverse rugulae shorter (incomplete laterally) and absent apically where enclosure is smooth and shiny; lateral surfaces punctate as dorsolateral surfaces in upper halves, impunctate or almost so below. Mesepisterna and metepisterna as in female. Wings as in female.

Tergal sculpturing as in female but terga 4-7 with basal area punctures more crowded. Sterna 2-5 as in female but subapical punctures sparser. Sternum 6 not reflected apically, emarginate apicomedially.

Sterna 7 and 8 and genital capsule (Figs. 20-24) similar to those of manifesta, but broader apex of penis valve, fewer hairs, shallower emargination of sternum 7 and rounder apex of sternum 8.

VESTITURE. Generally pale ochraceous in color. Thoracic dorsum with hairs normal in appearance. Terga 2-6 with weak apical pale fasciae. Sterna with apical fasciae of long suberect hairs. Tarsi with inner surfaces with hairs golden yellow.

TYPE MATERIAL. The female holotype and one female paratype were collected on September 17, au Las Cruces, New Mexico, by T. D. A. Cockerell on flowers of Pectis papposa (USNM No. 4867).

DISTRIBUTION. This species is known only from New Mexico and Texas. In addition to the holotype, three specimens have been examined. Data for these are given below.

New Mexico: 1 female paratype, same data as holotype; 1 male, 20 miles northwest of Deming, Luna County, September 22, 1950, Willis Gertch and Mont Cazier. Texas: 1 female, Big Bend National Park: October, 1957, A. H. Alex.

Names
Scientific source:

References
Panurgus pectidis Cockerell, 1897, Transactions of the American Entomological Society, vol. 24, p. 148.

Andrena (Callandrena) pectidis: Lanham, 1949, University of California Publications in Entomology, vol. 8, p. 199.

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FamilyScientific name @ source (records)
Asteraceae  Pectis papposa @ BBSL (1)

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Updated: 2021-05-08 14:36:49 gmt
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