Tortoise leaf beetle

"Tortoise beetle" is a term loosely applied to some leaf beetles in two subfamilies. They have the ability to totally conceal their antennae and feet under the flange of their elytra. In Chrysomelinae, it tends to include Paropsisterna, Paropsis, (Trachymela, Dichranostera etc.) http://en.wikipedia.org/wiki/Paropsis In Cassidinae there are some genera mostly Asidomprpha and Cassida which also entirely cover their head. http://en.wikipedia.org/wiki/Cassidinae. Ladybird beetles feed on soft hemipterans such as aphids. Ants like these bugs too because they provide honeydew for nutrition. Ladybird beetles have evolved a hemispherical shell and the ability to withdraw their toes to prevent them getting nipped when the ant guard appears. Leaf beetles live innocently on the same habitat and although they are no competition for ants, they have still needed to evolve the same defense (covergent evolution.) http://www.projectnoah.org/spottings/122336206 The true Paropsisterna gloriosa.