A New York woman was sentenced to state prison Tuesday in Dukes County superior court on cocaine trafficking charges.

Mitefea Kelly, 18, pleaded guilty to trafficking in cocaine, 36 to 100 grams, and was sentenced to four to six years at Massachusetts Correctional Institution-Framingham, a medium-security prison for women, by the Hon. Robert C. Rufo, an associate justice of the superior court.

The charge was reduced from trafficking in cocaine, more than 200 grams.

Ms. Kelly, a Queens resident, was arrested in August for allegedly coming to the Island with more than 270 grams of cocaine, part of what members of the Martha’s Vineyard Drug Task Force said was an operation to bring large amounts of cocaine to the Vineyard. In October, she was indicted by a grand jury.