Chrysaster ostensackenella

(Fitch, 1859)

Sort #: 292 | P #: 330274 | MPG #: 842
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Larval feeding type: Roundish, off-white to brownish, upperside leaf-mine, larva vacates the mine to pupate in a silken cocoon. Fall cocoons overwinter, adults emerging in the spring.
Larval substrate: Robinia pseudoacacia* (Black Locust)
Phenology: Adult: 5/19 to 8/29 (18 records)

Comment: Two generations

Status in MA (automated assessment): Widespread, very common
Status in N. America: Native
MA Endangered Species Act status: None
First Year Reported: 1868
Last Year Reported: 2026

Distribution by County: Berkshire, Hampshire, Franklin, Worcester, Middlesex, Essex, Norfolk, Plymouth, Barnstable, Dukes, Nantucket
Number of Records: 62