Eastern Tent Caterpillar (Malacosoma americanum) - Adult moths have a wingspan of approximately 1½ inches. They are reddish-brown and the forewings have two whitish stripes extending diagonally across the wing. Mature larvae are approximately 2 ¼ inches long, black with brownish markings, and a narrow unbroken white stripe the length of the back. Pupae are reddish-brown and in a cocoon of tough paper-like material surrounded by whitish silk. A powdery yellow substance is mixed with the silk. Eggs are small, dark colored, and cemented in a mass of as many as 300 encircling a twig. Each egg mass is covered with a dark colored glue-like substance which, after hardening, looks like a varnish finish.