Well pretty sure that is not an insect native to the states....so you must be somewhere else....being the IPM expert I am I would say generally if it has the name "leaf beetle" anywhere in its name it is a plant feeder, probably wont do too much harm, but if they are anywhere related to ladybugs (or ladybeetles) they are beneficial as well, and are predatory towards aphids....probably nothing to be concerned about though