Ectemnius borealis (Zetterstedt, 1838)
Ectemnius borealis: https://mail.marylandbiodiversity.org/species/21095
Synonyms
Crabro borealis  Ectemnius nigrinus 
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1 Record

Status

Northern species apparently near the southern end of its range in western Maryland.

Description

Identification requires careful assessment of the pronotal carina (Bohart & Kimsey, 1979), which is frequently not possible in photos. A lack of more observations may represent identification difficulty more than rarity of the species (M. Buck, pers. comm.).

Citations

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Source: Wikipedia

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