Male genitalia, including the pygophore, parameres, and inflated aedeagus, are compared between Murgantia histrionica (Hahn), M. varicolor (Westwood), and M. violascens (Westwood). These structures differ markedly between the three species, particularly the inflated aedeagus. As the inflated aedeagus has not been used previously in this genus for comparative purposes, we suggest that it be examined in the remaining species of Murgantia to determine if the current taxonomic status of each of these species is warranted.