Adult cockroaches are about 1/2″ – 5/8″ long. Their color is usually brown to tan. The pronotum (first segment of the thorax) has two dark parallel bars on it. Adult males are somewhat narrower than females when viewed from below. Thy nymphs, 1/8″ long when they emerge from the egg capsule, are almost uniformly dark except for a light tan area on the back of the second and third segments. Cockroaches reproduce very rapidly, so it is critical to call us soon after first seeing them so that we can control their spreading and multiplying.