Canada

Blackheaded fireworm

Rhopobota naevana

Eggs are deposited singly on the leaf surface and are flattened, circular, and about 0.65 mm in diameter; first yellowish and then turning black close to hatch. The larvae are typical caterpillar-like, with a distinct head and several pairs of distinct legs. The larvae are 1/3 - 1/2" long when fully grown, and range from cream colored to grayish or greenish; the head and shield just behind the head are dark brown to shiny black. A very few short, fine, and indistinct hairs are scattered over the body. The pupae are yellowish brown and about 1/4" long. Adults are grayish-brown and with a wingspan of 1/3 - 1/2".