Cephaloleia fenestrata is a species of beetle in the family Chrysomelidae. It is found in Costa Rica and Panama.
Adults reach a length of about 6.4âÂÂ8 mm. The head, pronotum, scutellum, legs and antennomeres 1âÂÂ2 are red, while antennomeres 3âÂÂ11 are red or black. The elytron has a black sutural vitta and a lateral vitta which narrows from base to the apex, as well as six reddish maculae.
Adults have been collected on Ischnosiphon species (including Ischnosiphon cerotus) and Pleiostachya pruinosa.