an evocatus, who, from private pique, joined the conspiracy against Caracalla. Having seized a convenient opportunity, he stabbed the emperor while on a journey from Edessa to Carrhae, and was himself slain upon the spot by one of the Scythian guards. The senate testified warm gratitude to their deliverer, and proposed to honour his memory by panegyrical orations and by statues. (D. C. 78.5, 18, comp. 8.)
[W.R]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890