A Pictorial Guide to Bees
of the
Humboldt Bay Dunes
by Susan E. Nyoka
Humboldt Bay National Wildlife Refuge

RELEASE 1.0 - July 2004
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Bee Anatomy Honey Bees Bumble Bees Solitary Bees Cleptoparasites
1
Scientific Name: Stelis leucotricha
Flight season: May-August
Host: Anthidium palliventre (wool-carder bee)
Recognition characters: Small (7-10 mm), robust, hairless; dark metallic blue-green with indistinct white markings on basal abdominal segments.
Stelis leucotricha

2
Scientific Name: Epeolus minimus
Flight season: June-September
Host: Reported to parasitize the nests of Colletes spp. (mining bees)
Recognition characters: Small (6-9 mm); silver-gray with black banding on the abdomen.
Epeolus minimus

3
Scientific Name: Coelioxys rufitarsus
Flight season: June-September
Host: Reported to parasitize the nests of Megachile wheeleri (leaf-cutter bees)
Recognition characters: Mid-sized (8-15 mm), robust, with sharply tapered abdomen (forked in males); black with narrow white bands on abdomen.
Female
Epeolus minimus
Male
Epeolus minimus