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The genus Hylaeus is referred to as the Masked Bee group. Most species have yellow vaguely mask-like yellow/white markings on their face. Not this one. It is distinctive in the absence of yellow. Looks like a wasp, does it not? This is because is carries its pollen and nectar loads internally and so the normal hairiness of most bees can be dispensed with.

The genus Hylaeus is referred to as the Masked Bee group. Most species have yellow vaguely mask-like yellow/white markings on their face. Not this one. It is distinctive in the absence of yellow. Looks like a wasp, does it not? This is because is carries its pollen and nectar loads internally and so the normal hairiness of most bees can be dispensed with.

The genus Hylaeus is referred to as the Masked Bee group. Most species have yellow vaguely mask-like yellow/white markings on their face. Not this one. It is distinctive in the absence of yellow. Looks like a wasp, does it not? This is because is carries its pollen and nectar loads internally and so the normal hairiness of most bees can be dispensed with.

Hylaeus basalis, female, Rocky Mountain National Park, Colorado

Wow, check out the expanded basal segments of this male Hylaeus basalis. Probably as big as they get in perhaps any bee in the world. Other Hylaeus have expanded segments (sexual selection?) but not like this. This bee is form Isle Royale a very large island in Superior with all sorts of interesting bees.

In rough translation this would be the "Florida Masked Bee." Tiny, grain of rice things, and usually mistaken for wasps as they carry their pollen internally rather than in their body hairs like other bees. Thus they have reverted to the wasp shape from whence bees came.

The female of the previous bee.

In rough translation this would be the "Florida Masked Bee." Tiny, grain of rice things, and usually mistaken for wasps as they carry their pollen internally rather than in their body hairs like other bees. Thus they have reverted to the wasp shape from whence bees came.

In rough translation this would be the "Florida Masked Bee." Tiny, grain of rice things, and usually mistaken for wasps as they carry their pollen internally rather than in their body hairs like other bees. Thus they have reverted to the wasp shape from whence bees came.

In rough translation this would be the "Florida Masked Bee." Tiny, grain of rice things, and usually mistaken for wasps as they carry their pollen internally rather than in their body hairs like other bees. Thus they have reverted to the wasp shape from whence bees came.

In rough translation this would be the "Florida Masked Bee." Tiny, grain of rice things, and usually mistaken for wasps as they carry their pollen internally rather than in their body hairs like other bees. Thus they have reverted to the wasp shape from whence bees came.

New State Record for Maryland, April 2012 Collected on Willow blooms in Somerset County....a very rarely collected bee east of the Mississippi. I don't know any recent records

New State Record for Maryland, April 2012 Collected on Willow blooms in Dorchester County....a very rarely collected bee east of the Mississippi. I don't know any recent records

New State Record for Maryland, April 2012 Collected on Willow blooms in Dorchester County....a very rarely collected bee east of the Mississippi. I don't know any recent records

New State Record for Maryland, April 2012 Collected on Willow blooms in Dorchester County....a very rarely collected bee east of the Mississippi. I don't know any recent records

Morris Arboretum, Philadelphia Pennsylvania, non-native species, collected by Stephanie Wilson

Morris Arboretum, Philadelphia Pennsylvania, non-native species, collected by Stephanie Wilson

Morris Arboretum, Philadelphia Pennsylvania, non-native species, collected by Stephanie Wilson

For some reason this species, Hylaeus leptocephalus, one of the masked bees, is one of the first non-native bees ever detected in the Americas. Oddly, it was first detected in the Dakotas around 1900. There must be a good story there, but we don't know what it is.... Reasonably common now, but mostly in disturbed, urban environments.

For some reason this species, Hylaeus leptocephalus, one of the masked bees, is one of the first non-native bees ever detected in the Americas. Oddly, it was first detected in the Dakotas around 1900. There must be a good story there, but we don't know what it is.... Reasonably common now, but mostly in disturbed, urban environments.

Masked Bee from Dorchester County. An alien masked bee, Hylaeus leptocephalus to be exact. In Maryland (in this case, Cambridge, Maryland) it is almost completely restricted to the urban weedy lot and industrial tract. Railroad lines...the best. Photography by Amanda Robinson.