Grasshoppers of the Western U.S.
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Adult grasshopper morphology
Male and female grasshopper genitalia
Male grasshoppers are distinguishable by the cerci, furcula, subgenital and supraanal plates.
Figure 1. Male Genitalia
Alternately, female grasshoppers have ovipositor dorsal and ventral valves which can be used to separate some species.
Figure 1. Female Genitalia