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Andrena porterae Cockerell, 1900
Andrena neurona Viereck, 1904; Andrena leptanthi Viereck and Cockerell, 1904; Andrena (Chaulandrena) porterae Cockerell, 1900

Life   Insecta   Hymenoptera   Apoidea   Andrenidae   Andrena
Subgenus: Dactylandrena

Andrena porterae, female, face
Smithsonian Institution, Entomology Department · 9
Andrena porterae, female, face

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Andrena porterae, female, side
Smithsonian Institution, Entomology Department · 9
Andrena porterae, female, side
Andrena porterae, female, top
Smithsonian Institution, Entomology Department · 9
Andrena porterae, female, top

Andrena porterae, female, wing
Smithsonian Institution, Entomology Department · 9
Andrena porterae, female, wing
Andrena porterae FEM
© Copyright Laurence Packer 2014 · 7
Andrena porterae FEM

Andrena porterae MALE comp
© Copyright Laurence Packer 2014 · 7
Andrena porterae MALE comp
Andrena porterae, face
Smithsonian Institution, Entomology Department · 1
Andrena porterae, face

Andrena porterae, top
Smithsonian Institution, Entomology Department · 1
Andrena porterae, top
Andrena porterae, wing
Smithsonian Institution, Entomology Department · 1
Andrena porterae, wing
Overview
Reprinted with permission of the American Entomological Society from: LaBerge, W. E. 1985. A revision of the bees of the genus Andrena of the Western Hemisphere. Part XI. Minor subgenera and subgeneric key. Transactions of the American Entomological Society 111: 440-567.

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This large species is closely related to A. submaura Linsley. The female of porterae is like that of submaura in having a long malar space, all black vestiture, and sparse scopal hairs and differs from the submaura female in the longer glossa, longer clypeus, and larger size. The male of porterae has the vestiture chiefly ochraceous or pale ochraceous, lacks a trochanteral process, and has an elongate glossa and malar space as in the female.

FEMALE. MEASUREMENTS AND RATIOS: N = 20; length, 11-13 mm; width, 3.0-3.5 mm; wing length, M = 4.52 0.127 mm; FL/FW, M = 1.20 0.012; POVL/FOVW, M = 3.62 0.072.

INTEGUMENTAL COLOR. As in caliginosa.

STRUCTURE. Antennal scape length equals first two and one-half flagellar segments; flagellar segment 1 as long as next two and one-half segments; segment 2 as long as segment 3 or almost so, slightly shorter than segment 4, and about as long as broad. Eyes each almost four times as long as broad, inner margins parallel. Malar space long, minimum length as long as basal mandibular width or almost so (as 1:1 to 3:4). Glossa long, attenuate, length equals median clypeal length or slightly more. Galea about as long as median clypeal length, shagreening weak. Maxillary palpus as in berberidis, but segmental ratio about 0.7:1.0:0.8:0.7:0.7:0.5. Labial palpus as in berberidis, but ratio about 1.0:0.6:0.5:0.4. Labral process large, triangular with blunt tip or with tip slightly broader and weakly emarginate; labrum apical to process about as long as process, with median crista, laterally surface convex. Clypeus protuberant, elongate, narrowed apically, extending beyond a line at lower margins eyes by distinctly more than half its median length; punctures deep, large, irregular in size and spacing, separated mostly by one to two puncture widths, surface shiny. Supraclypeal area, face above antennal fossae, and facial foveae as in caliginosa. Vertex above lateral ocellus equals about one ocellar diameter, dulled by fine tessellation and scattered punctures. Genal area in profile distinctly broader than eye; surface shiny near eye, shagreened in posterior half or more; punctures small to minute, separated by two to three puncture widths.

Pronotum as in caliginosa. Thoracic sculpturing as in caliginosa, but mesoscutal punctures often more crowded in posterior half and propodeal dorsal enclosure usually finely roughened mediobasally and often throughout except in narrow posterior and lateral areas.

Metasomal sculpturing as in caliginosa. Pygidial plate as in caliginosa, but apex narrow, pointed.

VESTITURE. Entirely black to dark brown, but one specimen from southern Utah is chiefly dark ochraceous to brown (similar to the male). Tibial scopal hairs long, simple, sparse; propodeal corbiculum not formed, hairs generally of the same type as elsewhere on propodeum and on mesepisternum. Vestiture generally long and sparse; terga without condensed apical fasciae.

MALE. MEASUREMENTS AND RATIOS. N = 20; length, 9-12 mm; width, 2.5-3.0 mm; wing length, M = 4.28 0.226 mm; FL/FW, M = 1.15 0.010; FS1/FS2, M = 2.0) 0.020.

INTEGUMENTAL COLOR. Black except as follows: clypeus yellow except narrow apical margin, lateral angles, and small maculae below tentorial pits; flagella below dark reddish-brown; tegula translucent, dark reddish-brown; wing membranes hyaline, veins reddish-brown to black; terga with apical areas translucent brown to hyaline; sterna with rufescent reflections; tarsi and tibiae dark, often with rufescent reflections.

STRUCTURE. Antennal scape length equals first two flagellar segments or slightly more; flagellar segment 1 as long as or longer than segments 2 plus 3, twice as long as segment 2, which is about as long as broad. Malar space, glossa, galea, maxillary palpus, and labial palpus as in female. Labral process reflexed, bidentate, shiny; labrum apical to process longer than process, convex with median crista. Clypeus with sparse punctures separated mostly by two to three puncture widths, surface shiny. Supraclypeal area and face above antennal fossae as in female. Vertex tall, above lateral ocellus equal to one and one-half ocellar diameters, sculptured as in female. Genal area in profile equals one and one-half times eye width or more; sculptured as in female, but posterior three-fourths shagreened; angulate posteriorly.

Thoracic form and sculpturing as in female, but mesoscutal posteromedian area , and scutellar anterior half usually with sparser punctures and propodeal dorsal I enclosure usually completely but finely roughened. Trochanter without apical process; fore tibia occasionally with a finger-like process beneath near base.

Metasomal sculpturing as in female (see caliginosa). Tergum 7 with narrow pseudopygidial area. Sterna 2-5 as in berberidis; sternum 6 flat with apical margin emarginate. Terminalia as in submaura, but sternum 7 with apical teeth rounded and emargination shallower (Figs. 27-31).

VESTITURE. Generally ochraceous and distributed as in berberidis; head usually with abundant black hairs on face along inner margins eyes, on vertex at level of ocelli, and on genal areas near eye margins; tergal basal areas ochraceous. Terga without apical fasciae; sterna 2-5 with weak apical fimbriae.

Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Grossulariaceae  Ribes aureum @ BBSL (5)

Ribes sp @ BBSL (6)

Ribes @ AMNH_BEE (6)
Rosaceae  Physocarpus malvaceus @ BBSL (8)
_  Withheld @ BBSL (20)

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Updated: 2021-05-13 11:35:57 gmt
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