Whitemarked Tussock Moth
Orgyia leucostigma

The larvae are brightly coloured, with tufts of hair-like setae. The head is bright red, the body has yellow or white stripes, with a black stripe along the middle of the back. There are bright red defensive glands on the hind end of the back. Four white toothbrush-like tufts stand out from the back, and there is a grey-brown hair pencil at the hind end. Touching the hairs will set off an allergic reaction in many humans. Young larvae skeletonize the surface of the leaf, while older larvae eat everything except the larger veins. They grow to about 35 mm.