Cornuplura nigroalbata (Davis, 1936) is a rarely collected cicada species represented by some 20 specimens deposited in institutional collections. We almost doubled the number of previously collected specimens and provide information on the acoustic behavior, ecology, distribution, and morphology of the species. The Arizona population studied appears to be the northernmost extension of the population and specimens are restricted to Santa Cruz and Cochise Counties in Arizona. The species is associated with the Sonoran desert vegetation. Males call primarily in the morning from desert oaks and mesquite with a preference for ocotillo at the beginning of the calling period. The song is an amplitude modulated call with dominant frequency of ≈6.5 kHz. We illustrate the genitalia and opercula of both males and females of the species for the first time.
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