Hylaeus leptocephalus
- kingdom: Animalia
- phylum: Arthropoda
- class: Insecta
- order: Hymenoptera
- family: Colletidae
- genus: Hylaeus
- species: Hylaeus leptocephalus
Beltsville- Brookmont
- Cambridge
- College Park
- Williamsport
Maryland- Wanaque
New Jersey- Borough of Bronx
- Brooklyn
- Chappaqua
- Elmira
New York- Philadelphia
Pennsylvania- Washington, D. C.
Washington, D.C.
United States