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Osmia conjuncta Cresson, 1864
Osmia quadridentata_homonym Cresson, 1878; Osmia cressonii Dalla Torre, 1896, replacement name; Diceratosmia conjuncta (Cresson, 1864)

Life   Insecta   Hymenoptera   Apoidea   Megachilidae   Osmia
Subgenus: Diceratosmia

Osmia conjuncta, Mid-Atlantic Phenology
© Copyright source/photographer · 9
Osmia conjuncta, Mid-Atlantic Phenology

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Osmia conjuncta, F, Back, MD, Carroll County
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Osmia conjuncta, F, Back, MD, Carroll County
Osmia conjuncta, F, Face, MD, Carroll County
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Osmia conjuncta, F, Face, MD, Carroll County

Osmia conjuncta, F, Side, MD, Carroll county
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Osmia conjuncta, F, Side, MD, Carroll county
Osmia conjuncta, F, MD, back
© Copyright source/photographer · 5
Osmia conjuncta, F, MD, back

Osmia conjuncta, F, MD, face
© Copyright source/photographer · 5
Osmia conjuncta, F, MD, face
Osmia conjuncta, F, MD, side
© Copyright source/photographer · 5
Osmia conjuncta, F, MD, side

Osmia conjuncta, M, MD, back
© Copyright source/photographer · 5
Osmia conjuncta, M, MD, back
Osmia conjuncta, M, MD, face
© Copyright source/photographer · 5
Osmia conjuncta, M, MD, face

Osmia conjuncta, M, MD, side
© Copyright source/photographer · 5
Osmia conjuncta, M, MD, side
Osmia conjuncta, bbSL204515 female, carinate hindcoxa copy
© USDA Bee Biology and Systematics Laboratory, Logan Utah · 1
Osmia conjuncta, bbSL204515 female, carinate hindcoxa copy

Osmia conjuncta, bbSL204515 female, parapsidal line elongate
© USDA Bee Biology and Systematics Laboratory, Logan Utah · 1
Osmia conjuncta, bbSL204515 female, parapsidal line elongate
Osmia conjuncta, bbSL204515 female, side
© USDA Bee Biology and Systematics Laboratory, Logan Utah · 1
Osmia conjuncta, bbSL204515 female, side

Osmia conjuncta, female, parapsidal line elongate bbSL
© USDA Bee Biology and Systematics Laboratory, Logan Utah · 1
Osmia conjuncta, female, parapsidal line elongate bbSL
Osmia conjuncta M 11 8782, T6 teeth
Deana Crumbling · 1
Osmia conjuncta M 11 8782, T6 teeth
Overview
Reprinted with permission from: Mitchell, T.B. 1962 Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 152.


FEMALE — Length 9 mm.; bluish-green; face slightly longer than distance between eyes above; eyes somewhat convergent below; lateral ocelli subequally distant from eyes, from each other and from margin of vertex; clypeus slightly convex, somewhat produced apically but not at all thickened, median third nearly straight; median length of labrum about equal to its basal width; mandibles tridentate, middle tooth nearer apex than to inner angle (fig. 32); cheeks slightly broader than eyes; wings very lightly infuscated, 2nd recurrent vein reaching 2nd submarginal cell much nearer apex than 1st does to base; basitarsi of legs relatively slender, about equal to the following segments combined, mid and hind spurs dark; pubescence including scopa entirely yellowish-white; punctures in general, deep and distinct, coarse and close on vertex, becoming very coarse and crowded, or subreticulate, on clypeus, front with a distinct nodus midway between antennal fossae, and with a second similar nodus just above this; punctures somewhat finer but close and distinct on cheeks and on scutum anteriorly, becoming somewhat coarser posteriorly, and very coarse and close, but interspaces shining, on scutellum; pleura coarsely, deeply and contiguously punctured; propodeum dull and tessellate, posterior surface with very shallow and obscure punctures, lateral faces practically impunctate, dorsal area densely tessellate but impunctate; abdominal terga somewhat more finely punctate, punctures distinctly separated medially on terga 1-3, becoming closer, deeper and coarser toward sides, more uniformly coarse and close on 4 and 5, very finely and densely punctate on 6, apical margins of all finely and distinctly punctate to the rims.


MALE — Length 9 mm.; abdomen bluish- green, head and thorax more olive green; face considerably longer than distance between eyes above; eyes very slightly convergent below; lateral ocelli subequally distant from eyes, each other, and margin of vertex; clypeus slightly convex, somewhat produced apically, with a shallow, median, apical emargination; length and basal width of labrum about equal; mandibles distinctly bidentate; cheeks considerably broader than eyes; wings subhyaline, 2nd recurrent vein reaching 2nd submarginal cell much nearer its apex than 1st does to base; tarsal segments of legs slender and simple, hind basitarsus without any evident tubercle, mid and hind spurs dark; pubescence entirely yellowish-white; punctures in general deep and distinct, close and coarse on vertex, becoming finer and densely crowded on lower portions of face, on clypeus, and on cheeks below, scutum rather finely and closely punctate anteriorly, becoming somewhat more coarsely so posteriorly, those of scutellum considerably coarser and very close; pleura densely, coarsely and deeply punctate; propodeum rather dull, punctures shallow but evident on both posterior and lateral faces; abdominal terga somewhat more finely punctate, punctures deep, distinct and uniformly quite close, reaching nearly to apical rim of each plate; lateral angles of tergum 6 acute (fig. 29) ; semicircular median emargination on tergum 7 delimited on each side by rather broadly rounded lobes; sternum 2 very broadly rounded apically, largely covering sternum 3, apical areas of 3 and 4 exposed, form as shown (fig. 29), 5-8 entirely retracted, 5 and 6 but little modified, 7 much reduced, and 8 triangularly pointed medially; gonocoxites rather deeply constricted just before tip.

DISTRIBUTION — Minnesota to Ontario and the New England states, south to Texas and North Carolina, March to August.

FLOWER RECORDS — Cercis, Dentaria, Fragaria, Geranium, Lupinus and Rubus. Recorded by Robertson (1929) on Anemonella, Blephilia, Cardamine, Collinsia, Hydrophyllum, Osmorrihiza, Polymonium, Psoralea, Ranunculus, Scutellaria, Stellaria, Trifolium and Viola. Rau (1937) has recorded the rearing of conjuncta from snail shells.

Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Asteraceae  Senecio anonymus @ BBSL (1)
Boraginaceae  Phacelia dubia @ UCRC_ENT (1)
Brassicaceae  Barbarea @ LACM_ENTB (1)
Fabaceae  Cercis @ CUIC_ENT (1)
Rosaceae  Fragaria sp @ BBSL__BBSLID (1)

Rosa sp @ BBSL (1)

Rubus sp @ BBSL (1)
Rubiaceae  Hedyotis nigricans @ BBSL (2)

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Updated: 2024-03-29 09:09:46 gmt
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