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Colletes willistoni Robertson, 1891
Life   Insecta   Hymenoptera   Apoidea   Colletidae   Colletes
Subgenus: None

Colletes willistoni, -male, -side 2012-05-10-14.19.14-ZS-PMax
© Copyright source/photographer · 9
Colletes willistoni, -male, -side 2012-05-10-14.19.14-ZS-PMax

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Colletes willistoni FEM mm x ZS PMax
© Copyright Laurence Packer 2014 · 7
Colletes willistoni FEM mm x ZS PMax
Colletes willistoni MALE mm x ZS PMax
© Copyright Laurence Packer 2014 · 7
Colletes willistoni MALE mm x ZS PMax

Colletes willistoni, male, back ---.. ZS PMax
© Copyright source/photographer · 5
Colletes willistoni, male, back ---.. ZS PMax
Colletes willistoni, male, face ---.. ZS PMax
© Copyright source/photographer · 5
Colletes willistoni, male, face ---.. ZS PMax

Colletes willistoni, female, leg
© John B. Pascarella, Valdosta State University, Georgia · 1
Colletes willistoni, female, leg
Colletes willistoni, figure9j
Mitchell, Bees of the Eastern United States, Vol. I, 1960 · 1
Colletes willistoni, figure9j

Colletes willistoni, female, mesepisternumside
© John B. Pascarella, Valdosta State University, Georgia · 1
Colletes willistoni, female, mesepisternumside
Colletes willistoni, female, mesepisternumside
© John B. Pascarella, Valdosta State University, Georgia · 1
Colletes willistoni, female, mesepisternumside

Colletes willistoni, female, scutellum
© John B. Pascarella, Valdosta State University, Georgia · 1
Colletes willistoni, female, scutellum
Colletes willistoni, female, scutum
© John B. Pascarella, Valdosta State University, Georgia · 1
Colletes willistoni, female, scutum

Colletes willistoni, female, side all
© John B. Pascarella, Valdosta State University, Georgia · 1
Colletes willistoni, female, side all
Colletes willistoni, female, side face
© John B. Pascarella, Valdosta State University, Georgia · 1
Colletes willistoni, female, side face

Colletes willistoni, female, side oblique
© John B. Pascarella, Valdosta State University, Georgia · 1
Colletes willistoni, female, side oblique
Colletes willistoni, female, tergal
© John B. Pascarella, Valdosta State University, Georgia · 1
Colletes willistoni, female, tergal
Overview
Reprinted with permission from: Mitchell, T.B. 1960 Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 141.

FEMALE—Length 9 mm.; length of face slightly exceeding greatest width; eyes moderately convergent below; length of malar space about one-third its width; facial foveae distinct, triangular, rather short and broad; antennae brownish-ferruginous beneath, length and breadth of median segments subequal; clypeus broad and flat, surface dull, densely tessellate, with scattered, obscure, shallow punctures; lateral angles of pronotum acute but hardly spine-like; metapleural protuberance not carinate; tegulae piceous; wings hyaline, slightly violaceous, veins and stigma brownish-testaceous; scutum and scutellum smooth and shining between the coarse and deep punctures, these close but not crowded on anterior portion of scutum, becoming sparse in center posteriorly, those on scutellum slightly coarser, irregularly scattered, not crowded; punctures of pleura coarse, deep and very close; dorsal area of propodeum shining between the irregular, parallel striae; front coxae smooth and shining, slightly conically produced at tip, but without distinct spines; tarsi piceous, hind basitarsi broad and flat, length about three times the breadth, spurs yellowish; pubescence short, thin, greyish-white on head and thorax, with some fuscous admixture on dorsum of thorax; abdominal terga very finely and closely, but deeply and distinctly punctate, apical margins dark. slightly depressed beneath the entire, dense, white fasciae, discal pubescence short, thin brownish.

MALE—Length 8 mm.; length of face slightly exceeding greatest width; eyes moderately convergent below; length of malar space nearly half its breadth; antennae blackish, median segments only slightly longer than broad, basal segment about as long as broad, slightly exceeding pedicel; clypeus flattened, densely tessellate, punctures shallow and obscure; pubescence short, thin, greyish-white on head and thorax, with a slight amount of fuscous admixture on dorsum of thorax; lateral angles of pronotum acute but hardly spine-like; metapleural protuberance not carinate; tegulae piceous; wings hyaline, slightly violaceous, veins and stigma brownish-testaceous; punctures of scutum coarse and deep, close anteriorly, becoming sparse in center posteriorly, intervening areas shining; punctures of scutellum more coarse, irregular, not crowded, those on pleura coarse, deep and very close; upper surface of propodeum with a series of shining pits separated by short striae; tarsi dark, hind basitarsi about three times longer than broad, parallel-sided, fore and mid metatarsi slender; spurs yellowish; punctures of abdominal terga fine, close, deep and distinct, apical margins slightly depressed beneath the entire, white, apical fasciae; discal pubescence short, thin, brownish.

DISTRIBUTION—Florida to Illinois and New York; April, May and June. According to Stephen the range extends northward to Nova Scotia and west to Utah.

FLOWER RECORDS—This has been collected in North Carolina on Toxicodendron, and in Florida on Melilotus alba and Physalis elliottii. Other records given by Stephen are Monarda punctata occidentalis, Physalis lanceolata, P. virginiana. and Psoralea tenuiflora. Robertson (1929) lists also Ceanothus americanus, Pycnanthemum flexuosum and Rhus glabra.

Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Liliaceae  Allium sp @ BBSL (1)
Solanaceae  Physalis elliottii @ AMNH_BEE (1)

Physalis heterophylla @ AMNH_BEE (1)

Physalis philadelphica @ AMNH_BEE (1)

Physalis virginiana @ AMNH_BEE (3)

Physalis @ AMNH_BEE (2)

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Updated: 2017-03-26 17:49:24 gmt
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