Both sexes fully winged. Body and legs brown, tarsi yellow, also base and apex of tibiae; antennal segments III yellow, IV–V yellow at base; fore wing white with apex dark, a dark cross band following the basal third and posterior margin also dark. Antennae 8-segmented, III–IV with sensorium forked, VII–VIII elongate. Head and pronotum reticulate, with markings inside each reticle, without prominent setae. Metanotum reticulate, median setae wide apart. Metathoracic endofurca lyre-shaped and extending almost to mesothorax. Fore wing first vein with 2 setae on distal half, second vein with about 5 setae; postero-marginal cilia wavy. Tarsi 1-segmented. Abdominal tergites II–VIII with median pair of setae small, posterior margin with prominent craspedum that is toothed laterally; lateral thirds of tergites reticulate, reticles with internal markings. Sternites with 3 pairs of marginal setae arising anterior to broad craspedum.
Male sternites III–VII with slender transverse pore plate.
Twenty-one species are recognized currently in the genus Caliothrips, of which 10 are known from North America (Nakahara, 1991), mostly from the southeastern States. The other species are found widely around the world in tropical and subtropical countries, with none living in Europe. C. marginipennis is one of only two species in the genus in which the forewing is extensively white.
Caliothrips marginipennis (Hood)
Breeding on leaves.
Apparently associated with grasses.
California, Arizona, Texas, Mexico, also Georgia.