This paper isn’t the first to suggest photosynthesis in insect. This one beats it by a couple of years:
Plotkin M, Hod I, Zaban A, Boden SA, Bagnall DM, Galushko D, Bergman DJ. 2010. Solar energy harvesting in the epicuticle of the oriental hornet (Vespa orientalis). Naturwissenschaften 97(12): 1067-1076. http://dx.doi.org/10.1007/s00114-010-0728-1