Xanthorhoe labradorensis
(Packard, 1867)
Labrador Carpet
Sort #: 1866 | P #: 910411 | MPG #: 7368 | PFG Page #: 188
View on BugGuide | View on iNaturalist | BOLD Link
Larval substrate: Variety of plants, incl. Brassica (Cabbage), Tsuga (Hemlock), Lepidium virginicum (Virginia Peppergrass), Raphanus raphanistrum (Radish), Cardamine impatiens* (Narrow-leaved Bitter-cress)
Phenology: Adult: 4/30 to 9/21 (91 records)
Comment: Ideally, it should be dissected to distinguish it for certain from X. packardata. However, the male antennae are simple, ciliate, in X. labradorensis and doubly bifasciculate in X. packardata. The presence of a deep indentation to the outer edge of the PM line near the costa in X. packardata appears to be a reliable distinguishing character (see here), although specimens with only a small notch could be either species.
Status in MA (automated assessment): Fairly widespread, uncommon
Status in N. America: Native
MA Endangered Species Act status: None
First Year Reported: 1906
Last Year Reported: 2025
Distribution by County: Berkshire, Hampden, Hampshire, Franklin, Worcester, Middlesex, Essex, Norfolk, Bristol, Plymouth, Barnstable, Dukes, Nantucket
Number of Records: 111
