Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The American Dagger Moth (Acronicta americana) is a moth of the family Noctuidae. It is native to North America.The American Dagger Moth has a wingspan of 50 to 65 mm (2 to 2.5 inches). It is gray to gray-brown with darker markings. It usually has a sharp, double postmedian line, with white in between the two lines. There is a black dash on the anal area of the fore wing. The hind wing is gray with a faint, darker gray median line in the male.The female is similar, except the hind wing is completely dark.