This Dagger moth has a 1.5 to 2 inch wingspan and is one inch in length. The forewing is light gray and is covered with darker gray scales. The black anal dash forms a spot that cuts through the post-median line. The hindwing is white. The caterpillar is covered with either bright yellow or white long hairs with black tufts that stand straight up.
This species has been photographed once in Fontenelle Forest on North Stream Trail in mid-August 2017. It occurs in treed floodplains and forested river banks. It is considered to be uncommon, but widely distributed throughout the U.S.
The larvae eat the leaves of Cottonwoods and Willows.
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