Optical photomicrographs and scanning electron photomicrographs of third instar of Anastrepha nolazcoae 70 preoral organ 71 ventral surface of mouthhook 72 cephaloskeleton, lateral view 73 cephaloskeleton, dorsal view 74 prothoracic spiracle, lateral view 75 prothoracic spiracle, dorsolateral view. Scale bars: 10 μm (70, 71); 50 μm (74, 75); 200 μm (72, 73).