Male mullein bugs, Campylomma verbasci (Meyer), were attracted in field experiments in the Okanagan Valley of British Columbia to traps baited with females, extracts of crushed females, or Porapak Q-captured volatiles from females on common mullein, Verbascum thapsus L. Extracts from the female head and thorax attracted more males than did abdominal extracts. Traps baited with C. verbasci of both sexes caged together were not attractive. Analysis by coupled gas chromatography – mass spectrometry revealed n-butyl butyrate and n-hexyl butyrate in female extracts and captured volatiles, but only the latter compound in male extracts. However, these esters were unattractive, either alone or combined. We suggest that Porapak Q-captured volatiles could be used in pheromone isolation, and that pheromone-baited traps have promise in monitoring populations of C. verbasci.