Gaint Walkingsticks are usually credited with being the LONGEST insect in North America. This female's body is around five inches long, which is about average for a fully-grown female. Femoral spines on their mid and hind legs are diagnostic for this species according to BugGuide.
Caterpillar Hosts: Apple, dogwood, hickory, maples, oaks, poplars, and rose bushes. Range: New York to Florida, west to Missouri and Texas. And, yes, the caterpillars are very attractive and do sting. (BAMONA)
Stinging Rose Caterpillar Moth (Parasa indetermina - 4699)
Caterpillar Hosts: Plants in the pea family, including alfalfa and various clovers. Adult Food: Nectar from many kinds of flowers including dandelion, milkweeds, goldenrods, and asters. (Source and more info: BAMONA)