The black dot shows the location of the only county-level record for N. propsti (Cole et al. 2021, pp. 46-49). This species is found only on Santa Catalina Island, which is one of the five islands that constitute the Channel Islands National Park. The Park lies off-shore of Los Angeles and is part of Los Angeles County. The black dot covers Santa Catalina Island; the other four islands are shown in their correct positions and shapes.