Arctia parthenos

Harris, 1850
St. Lawrence Tiger

Sort #: 2146 | P #: 930288 | MPG #: 8162 | PFG Page #: 298
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Larval feeding type: Feeds externally on leaves
Larval substrate: Deciduous trees and plants, incl. Acer negundo* (Box Elder), Alnus (Alder), Betula (Birch), Salix (Willow)
Phenology: Adult: 7/04 to 7/16 (3 records)

Status in MA (automated assessment): Restricted distribution, very rare
Status in N. America: Native
MA Endangered Species Act status: None
First Year Reported: 1929
Last Year Reported: 2025

Distribution by County: Berkshire, Hampshire, Franklin, Barnstable
Number of Records: 10