Bionomics of North American Scutelleridae are poorly known compared with the related family Pentatomidae, with host-plant relationships particularly needed for species of the scutellerid subfamily Odontotarsinae and certain species of the pentatomid genus Chlorochroa, subgenus Rhytidolomia. The odontotarsines Euptychodera corrugata (Van Duzee), Phimodera binotata (Say), and Vanduzeeina balli (Van Duzee), and the pentatomid Chlorochroa (Rhytidolomia) viridicata (Walker) are reported from field sagewort (Artemisia campestris L. subsp. caudata [Michx.] Hall. & Clems.; Asteraceae) at a site in the Nebraska Sandhills. The scutellerids were beaten from the bases of sagewort, whereas the pentatomid was swept from flower buds. Color images of the adults and new state records for C. viridicata are presented, previous biological information on the four pentatomoids is reviewed, biological attributes contributing to their apparent rareness is discussed, and the long-term protection that the Nebraska Sandhills might provide for these species is evaluated. A greater capacity for detecting the odontotarsines is needed to substantiate their use of A. campestris as a host plant and an apparent preference for Asteraceae, and to provide specimens for laboratory studies of their bionomics.