Arvelius Spinola, 1837

The genus can be recognized by having the mandibular plates longer than clypeus; the apex of the mandibular plates is acute; the antennal segment I is wide and short; the antennal segment IV is the longest; the pronotum is trapezoidal, with the anterior portion inclined; the anterolateral margins of the pronotum are tuberculated; the humeral angles with acute processes laterally projected; the femora have a distal short spine; the tibiae are sulcate; the mesosternum has a prominent medial carina; and the abdomen ventrally with a medial tubercle (Brailovsky 1981).