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Andrena misella Timberlake, 1951
Andrena (Euandrena) misella Timberlake, 1951

Life   Insecta   Hymenoptera   Apoidea   Andrenidae   Andrena
Subgenus: Ptilandrena


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Overview
Reprinted with permission of the American Entomological Society from: LaBerge, W. E., Ribble, D. W. 1975. A revision of the bees of the genus Andrena of the Western Hemisphere. Part VII. Subgenus Euandrena. Transactions of the American Entomological Society 101: 371-446.

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Andrena misella is a nonmetallic species without violaceous reflections on the clypeus in both sexes. The female of misella differs from the preceding species in having the scopal hairs simple or extremely weakly plumose throughout (usually the scopae are simple medially and plumose along anterior and posterior margins). The female of Andrena anisochlora Cockerell is easily confused with darker specimens of misella, but misella has the short malar space of the Euandrena, whereas the malar space of anisochlora is one-fourth as long as wide or longer.

FEMALE. MEASUREMENTS AND RATIOS. — N = 20; length, 8-10 mm; width, 2-3 mm; wing length, M = 3.09 ± 0.089 mm; FL/FW, M = 0.94 ± 0.005; FOVL/FOVW, M = 4.50 ± 0.130.

INTEGUMENTAL COLOR. — Generally black without blue, green or violaceous metallic reflections; mandible and flagellar segments as in caerulea; wing membranes somewhat infumate, veins blackish-brown; tegulae piceous; legs brownish-black; sterna brownish.

STRUCTURE. — Antennae as in caerulea but scape slightly longer than first four flagellar segments. Eyes. mandible and galea as in caerulea but galea slightly shinier. Maxillary palpus as in caerulea but segmental ratio about as 0.9:1.0:1.0:1.0:0.8:0.9. Labial palpus as in caerulea but ratio about as 1.0:0.6:0.5:0.8. Labral process short, broad, entire. Facial fovea short and narrow as in caerulea but often slightly closer to lateral ocellus, usually separated therefrom by about two ocellar diameters. Remainder of head essentially as in caerulea.

Thoracic sculpture and structure as in caerulea except as follows: propodeum outside of dorsal enclosure with punctures more distinct; hind tibia relatively narrow, not cuneate; hind wing with vannal lobe narrow, scarcely as wide or no wider at level of base of excision as end of cell Cu.

Terga as in caerulea but terga 1 and 2 with punctures distinct, large and shallow and terga 2-4 with relatively broad hyaline apices. Pygidial plate broad, flat, apically bluntly rounded, without internal raised ridge. Sterna as in caerulea.

VESTITURE. — As in caerulea color highly variable. Most specimens with vestiture black except as follows: ochraceous on clypeus and surrounding antennal bases and often on scape; dorsum of thorax ochraceous; legs mostly pale brown to amber-colored except basally dark. Palest specimens essentially as in caerulea except with more black hairs mixed with the pale on the face (especially along margins of compound eyes and on vertex) and on upper portions of mesepisterna; terga 2-4 with apical pale fasciae usually absent but if present weak and usually broadly interrupted on terga 2 and 3 (in palest specimens uninterrupted but narrow). Propodeal corbicula incomplete anteriorly with many long, simple or almost simple, internal hairs. Tibial scopal hairs simple at least medially, weakly plumose along anterior and posterior margins (rarely extremely weakly plumose throughout). Hairs of hind femur weakly branched. Trochanteral flocculus weak, short. Abundance and length of hair generally as in caerulea but those of terga 1 and 2 very long and those of 3 and 4 longer than in caerulea.

MALE. MEASUREMENTS AND RATIOS. — N = 20; length, 6.5-10 mm; width, 1.5-2.5 mm; wing length, M = 2.72 ± 0.102 mm; FL/FW, M = 0.97 ± 0.005; FS1/FS2, M = 1.76 ± 0.040.

INTEGUMENTAL COLOR. — As in female but wing membranes lighter, yellowish and veins often reddish-brown; legs more black than brown.

STRUCTURE. — Antenna as in caerulea but scape length about equal to first two and one-half flagellar segments. Eyes each about three times as long as broad, inner margins converging strongly towards mandibles. Mandible and galea as in caerulea but galea slightly shinier. Maxillary palpus as in caerulea but segmental ratio about as 1.0:0.9:0.9:0.8:0.5:0.8. Labial palpus as in caerulea but ratio about as 1.0:0.6:0.5:0.6. Remainder of head essentially as in caerulea.

Thoracic sculpture and structure as in caerulea except as follows: propodeum outside of dorsal enclosure slightly more coarsely punctate; hind wing with vannal lobe short and extremely narrow, at base of excision lobe no broader than end of cell Cu or narrower (rarely slightly broader).

Terga and sterna essentially as in caerulea but terga usually with broad hyaline apices (smoky or yellow in color).

Terminalia as in figures 45-49; note the following: genital capsule similar to lawrencei; sternum 8 with apex rounded.

VESTITURE. — Generally as in caerulea but terga 1 and 1 with hairs longer and terga 2-5 with apical pale fasciae extremely weak and normally broadly interrupted medially. Sterna with subapical fimbriae absent or extremely weak.

Names
Scientific source:

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FamilyScientific name @ source (records)
Brassicaceae  Brassica sp @ BBSL (1)
Ranunculaceae  Ranunculus @ AMNH_BEE (1)
_  Withheld @ BBSL (1)

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Updated: 2024-03-28 11:05:34 gmt
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