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Megachile townsendiana Cockerell, 1898
Megachile bishoppi Cockerell, 1915

Life   Insecta   Hymenoptera   Apoidea   Megachilidae   Megachile
Subgenus: Argyropile

Megachile townsendiana, -female, -back 2012-07-30-17.32.41-ZS-PMax
© Copyright source/photographer · 9
Megachile townsendiana, -female, -back 2012-07-30-17.32.41-ZS-PMax

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Megachile townsendiana, -female, -face 2012-07-30-17.42.36-ZS-PMax
© Copyright source/photographer · 9
Megachile townsendiana, -female, -face 2012-07-30-17.42.36-ZS-PMax
Megachile townsendiana, -female, -side 2012-07-30-17.50.01-ZS-PMax
© Copyright source/photographer · 9
Megachile townsendiana, -female, -side 2012-07-30-17.50.01-ZS-PMax

Megachile townsendiana, male, face
Smithsonian Institution, Entomology Department · 9
Megachile townsendiana, male, face
Megachile townsendiana, male, side
Smithsonian Institution, Entomology Department · 9
Megachile townsendiana, male, side

Megachile townsendiana, male, top
Smithsonian Institution, Entomology Department · 9
Megachile townsendiana, male, top
Megachile townsendiana, male, wing
Smithsonian Institution, Entomology Department · 9
Megachile townsendiana, male, wing

Megachile townsendiana, m, back, Mariposa CA ---.
© Copyright source/photographer · 5
Megachile townsendiana, m, back, Mariposa CA ---.
Megachile townsendiana, m, face, Mariposa CA ---.
© Copyright source/photographer · 5
Megachile townsendiana, m, face, Mariposa CA ---.

Megachile townsendiana, m, left, Mariposa CA ---
© Copyright source/photographer · 5
Megachile townsendiana, m, left, Mariposa CA ---
Megachile townsendiana, Barcode of Life Data Systems
Barcode of Life Data Systems · 1
Megachile townsendiana, Barcode of Life Data Systems

Megachile townsendiana, female, mandibles
© NC Agriculture State Experiment Station Technical Bulletin Number 152, T. B. Mitchell, 1962 · 1
Megachile townsendiana, female, mandibles
Megachile townsendiana, male, T6
© Rebekah Andrus Nelson · 1
Megachile townsendiana, male, T6
Overview
Identification Tips: Scopal hairs are unusually luxuriant...thick and long, turned up portion of tip of S6 can easily be missed, look closely,


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 12 mm.; black including legs, tegulae yellowish-testaceous, spurs yellow; eyes subparallel; clypeal margin nearly straight, the narrow, median area very slightly produced, very narrowly shining and impunetate, with a minute, median tubercle; mandibles quite broad apically, 4-dentate, a long bevelled edge between 3rd and 4th teeth and a very short one between 2nd and 3rd (fig. 51) ; lateral ocelli slightly nearer margin of vertex than to eyes; cheeks slightly narrower than eyes; punctures of vertex and cheeks above deep and distinct, rather fine and close, becoming more shallow and obscure on cheeks below; face below ocelli quite densely rugose beneath dense pubescence, supraclypeal area more distinctly but densely punctate; clypeus shining between rather coarse and very close punctures, these becoming somewhat finer toward apical margins; pubescence of face white, rather short but copious and dense around antennae and on sides of face, some-what thinner on cheeks above but becoming more elongate and dense below, short, thin and somewhat more yellowish or dark on vertex; pubescence of thorax dense and white but rather short laterally and posteriorly, more elongate around wing bases, quite conspicuous across anterior margin of scutum, very short and inconspicuous, hardly evident, over posterior half, a pair of oblique, whitish, tomentose lines anteriorly, and scutello-mesothoracic suture densely white tomentose; scutum densely, tessellate, punctures rather shallow but distinct, slightly separated medially, but close laterally, scutelum somewhat more coarsely, and distinctly but very closely punctate, axillae minutely and densely punctate; punctures of pleura rather coarse and deep, close in large part, propodeum somewhat obscured by dense pubescence, posterior face with rather vague, fine and close punctures; front tarsi slender and simple; mid basitarsi broad apically, sub equal to its tibia, the anterior, apical angle narrowly produced, segments 2 and 3 very slender at base, broadened apically, and anterior angle markedly produced; hind basitarsi very broad, about equal to their tibiae but somewhat shorter; tegulae minutely and very closely punctate; wings subhyaline, veins piceous; terga 2-4 narrowly grooved across base, basal margins of the grooves distinct but not carinate, apical margins of 1-5 with complete, dense, pale, apical fasciae, tergum 1 with abundant, erect, whitish pubescence, very copious at sides, discal pubescence of the following terga very short and inconspicuous, hardly visible, apparently pale in large part; punctures very fine and close on the more basal terga, becoming somewhat more distinctly but not widely separated on 4 and 5; tergun’i 6 quite broadly rounded apically, very slightly concave in profile, with no erect pubescence at all visible, largely covered with very fine, appressed tomentum which does not quite hide surface, very minutely and closely punctate, erect hairs evident only at extreme sides; sternum 6 rather well covered with short scopal hairs, with a sub-apical, dense fringe beyond which a bare marginal lip is somewhat flexed upward; scopa entirely white; sternal plates very closely and quite deeply punctate; no sternal fasciae in evidence.

MALE — Length 10 mm.; black, tegulae testaceous-hyaline, legs largely dark, spurs yellow; eyes slightly convergent below; clypeal margin beneath beard very slightly produced medially, this area very slightly incurved, with a minute, median denticle; mandibles obscurely 4-dentate, with a sub-basal, narrowly acute, inferior process; apical segment of flagellum quite narrow and elongate; lateral ocelli slightly nearer eyes than to margin of vertex; cheeks subequal to eyes in width; punctures of vertex quite deep and distinct, rather fine and close, becoming somewhat more minute and inconspicuous on cheeks; face below ocelli very finely and closely punctate or subrugose beneath dense pubescence; head and thorax with entirely white pubescence, quite copious and elongate around antennae and over lower part of face and on cheeks below, becoming very thin on cheeks above and across vertex, quite copious on thorax laterally and posteriorly, thin and elongate on thorax dorsally; scutum dull and very densely tessellate, punctures minute, close and shallow, hardly evident, scutellum more distinctly but very finely and closely punctate; pleura dull beneath the pubescence, with very fine and close punctures throughout; lateral faces of propodeum somewhat shining, posterior face with minute and rather close and shallow punctures; front coxal spines quite slender and elongate, acute apically, densely pubescent posteriorly, and to a considerable degree obscured by the coxal pubescence; mid tihial spurs slender and well developed; anterior tarsi entirely simple and slender, much elongated, with a very short, posterior, white fringe, front tibiae more or less testaceous, the femora reddish-testaceous on upper and anterior faces, more fuscous posteriorly except along lower margin, rather densely fringed with white pubescence posteriorly; tegulae smooth, punctures hardly evident; wings subhyaline or faintly infuscated, veins brownish-piceous; terga 2-5 shallowly depressed across base, basal margin of the depressions distinct but hardly carinate, apical margins of terga narrowly depressed, more deeply so on the more apical terga, white fasciate, completely so on 3 and 4, fasciate only at sides on the more basal plates; tergum 1 with elongate and rather copious, pale pubescence, discal pubescence of the following terga very thin, sparse and inconspicuous, hardly evident, apparently largely pale, punctures fine and rather close basally, becoming somewhat more widely separated on 3-5; tergum 6 very densely pale tomentose across base, narrowly produced medially, this area representing the carina slightly downcurved apically, with a narrow, median emargination, median teeth of apical margin acute, well developed, considerably nearer the well developed and acute lateral teeth than to each other; tergum 7 partially exposed, rather broad, apical margin subacute; sterna 1-4 exposed rather deeply and closely punctate, apical margins abruptly depressed and yellowish-hyaline, pubescence rather elongate but thin and pale; setose area of sternum 5 poorly defined, setae very sparse, dilated apically (fig. 52); setose areas of sternum 6 rather widely separated, well defined,setae robust, flattened and dilated apically, apical lobe poorly defined; gonocoxites nar- rowed above base, compressed apically, con- shorter than penis valves (fig. 50).

DISTRIBUTION — Lower California to Arizona, Colorado and Texas, eastward to Florida, Georgia and North Carolina, May to October.

FLOWER RECORDS — Actinella, Chrysopsis, Helianthus and Melanthera.

Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Asteraceae  Baccharis @ AMNH_BEE (1)

Baileya multiradiata @ UCRC_ENT (1)

Baileya pleniradiata @ UCRC_ENT (4)

Baileya sp @ BBSL (1)

Bidens sp @ BBSL (1)

Chrysothamnus sp @ BBSL (1)

Encelia frutescens @ UCRC_ENT (2)

Haplopappus acradenius @ BBSL__KWC (1)

Heterotheca subaxillaris @ UCRC_ENT (1)

Hymenopappus filifolius @ BBSL (1)

Isocoma acradenia @ UCRC_ENT (1)

Pectis papposa @ UCRC_ENT (1)

Pectis sp @ BBSL (1)

Pectis @ CUIC_ENT (2)

Verbesina @ UCRC_ENT (4)
Cleomaceae  Wislizenia refracta @ UCRC_ENT (1)
Fabaceae  Psorothamnus scoparius @ AMNH_BEE (5)

Psorothamnus @ CUIC_ENT (2)
Zygophyllaceae  Kallstroemia @ CUIC_ENT (1)
_  Withheld @ BBSL (17)

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Updated: 2019-11-13 15:21:37 gmt
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