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DOI/FWS RIN: 1018-BG69 Publication ID: Fall 2023 
Title: Endangered and Threatened Wildlife and Plants; Listing Determinations for Three Brazilian Butterflies 

FWS will make a final determination on our proposal to list the Fluminense swallowtail (Parides ascanius), Hahnel’s Amazonian butterfly (Parides hahneli), and Harris’s mimic swallowtail (Eurytides lysithous harrisianus) as endangered species under the Endangered Species Act. These butterflies are found in Brazil.

Agency: Department of the Interior(DOI)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 50 CFR 17   
Legal Authority: 16 U.S.C. 1531 et seq.   
Legal Deadline:
Action Source Description Date
NPRM  Judicial  Settlement agreement (for Fluminense swallowtail and Harris’s mimic swallowtail)  07/27/2023 
Action Date FR Cite
NPRM  07/27/2023  88 FR 48414   
NPRM Comment Period End  09/25/2023 
Final Action  07/00/2024 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Rachel London
Branch of Delisting and Foreign Species, Ecological Services
Department of the Interior
United States Fish and Wildlife Service
5275 Leesburg Pike, MS: ES,
Falls Church, VA 22041
Phone:703 358-2491
Fax:703 358-1735