William Smith,
A Smaller Dictionary of Greek and Roman Antiquities
“ Other distinctions of the consuls were the curule chair (sella curulis) , and the toga with the purple hem (toga praetexta) . The ivory sceptre (scipio or sceptrum) and purple toga were not distinctions of the consuls in general, but only when they celebrated a triumph. Under the empire a consul was sometimes distinguished by the senate with a sceptre bearing an eagle on the top, but his regular ensigns consisted of the toga picta, the trabea, and the fasces, both within and without the city.—The consuls were the highest ordinary magistrates at Rome. ”
