Syritta flaviventris (Syrphid Fly) is a species of flies in the family flower flies. They visit flowers of tasselflower and Pinkweed. They are diurnal.
Definition: Eye-spots which may be set into a pit to reduce the angles of light that enters, to allow the organism to deduce the angle of incoming light. Lens-like structures may be present, but stemmata, unlike lens eyes, cannot form an image, either for lack of refractive power or retinal resolution.
