Endangered and Threatened Wildlife and Plants; Endangered Species Status for Puerto Rican Skink, Lesser Virgin Islands Skink, and Virgin Islands Bronze Skink and Designation of Critical Habitat; Threatened Species Status With Section 4(d) Rule for Culebra Skink and Designation of Critical Habitat; Not Warranted Species Status for Mona Skink, Greater Virgin Islands Skink, Greater Saint Croix Skink, and Lesser Saint Croix Skink

We, the U.S. Fish and Wildlife Service (Service), propose to list the Puerto Rican skink (Spondylurus nitidus), a skink species from Puerto Rico and Desecheo Island, and the Lesser Virgin Islands skink (S. semitaeniatus) and Virgin Islands bronze skink (S. sloanii), two skink species from the U.S. Virgin Islands and the British Virgin Islands, as endangered species. We propose to list the Culebra skink (S. culebrae), a skink species from Culebra Island and offshore cays of Puerto Rico, as a threatened species with protective regulations under section 4(d) of the Endangered Species Act of 1973, as amended (Act) ("4(d) rule"). After a review of the best available scientific and commercial information, we find that listing these species is warranted. If we finalize this rule as proposed, we will add these species to the List of Endangered and Threatened Wildlife and extend the Act's protections to these species. We also propose to designate critical habitat for the Puerto Rican skink, Culebra skink, Lesser Virgin Islands skink, and Virgin Islands bronze skink under the Act. We also announce the availability of an economic analysis of the proposed designation of critical habitat for the Puerto Rican skink, Culebra skink, Lesser Virgin Islands skink, and Virgin Islands bronze skink. We find that it is not warranted at this time to list the Mona skink (Spondylurus monae), the Greater Virgin Islands skink (S. spilonotus), the Greater Saint Croix skink (S. magnacruzae), and the Lesser Saint Croix skink (Capitellum parvicruzae). However, we ask the public to submit to us at any time any new information relevant to the status of any of the species mentioned above and their habitats.