Lymantriidae is a family of moths. Many of its component species are referred to as `Tussock moths` of one sort or another. The caterpillar, or larval, stage of these species often has a distinctive appearance of alternating bristles and haired projections. Like other families of moths, many Tussock Moth caterpillars have urticating hairs (often..... Found on http://en.wikipedia.org/wiki/Lymantriidae