The current work describes a case of intestinal myiasis, where the third-instar of unidentified larvae, recovered from a stool specimen of a child, were examined using scanning electron microscopy (SEM). Morphological features of these larvae were similar to larvae of family Calliphoridae. They were identified as Lucilia sericata. The present work added new features that could be helpful for species identification. These features included number and arrangement of papillae on the anterior spiracle, structure of spines, shape and arrangement of circumspiracular papillae at caudal segment and branching peculiarity of the posterior spiracular hairs. These new additions could benefit future identification of the Lucilia spp. larvae that exist in Egypt.