Etymology: The specific epithet, immaculata, refers to the lack of any pattern on the
forewing and hindwing.
Discussion. Unlike most species of Schinia, S. immaculata has no forewing markings
in all but one paratype, which has a barely perceptible trace of both an antemedial and
postmedial line (Fig. 1). The form of the foretibia, male genitalia, and the coils of the
aedoeagus are typical of Schinia. The species was collected in all riparian zones of the
study area. Schinia immaculata is a spring flyer, being active from mid-April to mid-May.
Other large river systems in the southwestern United States should be investigated to try to
learn more about the distribution of this unusual species.