Arocatus longiceps Stål, 1872c: 42. HT: male, Greece; NHRS.
Arocatus grassii Picco, 1920: 101 (syn. Stichel, 1959: 314). ST(S): Italy, Lazio; MCZR?
Arocatus grassii var. fuscipes Picco, 1920: 104. LT (Péricart, 1998a: 277): female, Italy, nr Roma; MCSN.
Arocatus grassii var. nigrirostris Picco, 1920: 104. LT (Péricart, 1998a: 277): male, Italy, nr Roma; MCSN.
Arocatus grassii var. sanguineus Picco, 1920: 105. LT (Péricart, 1998a: 277): male, Italy, nr Roma; MCSN.
Arocatus grassii var. thoracicus Picco, 1920: 104. ST(S): Italy, nr Roma; MCZR?