Key to Cavonus females (modified from Carne 1957)

Females of C. leai and C. fovealacus are unknown.

1. Clypeus with sides sinuate.............................................................................. 2

- Clypeus evenly rounded................................................................................ 4

2. Clypeal apex bisinuate; dorsal elytral striae heavily impressed and continuous over apical calli...... C. acutifrons Lea, 1917

- Clypeal apex truncate; dorsal elytral striae obsolete posterior to apical calli....................................... 3

3. Posteromedian area of pronotum finely micropunctate, surface microreticulate; frons with a transverse groove behind clypeofrontal ridge (Carne 1957, Fig. 337)................................................... C. sharpi Blackburn, 1888

- Posteromedian area of pronotum with coarse punctation, surface shiny; frons lacking, or with only a trace of a transverse groove............................................................................ C. armatus Sharp, 1875

4. Coxal vestiture brownish black; metatibia with smaller spur straight, blunt; scutellum punctate at base but without submarginal sculpturing..................................................................... C. niger (Blackburn, 1888)

- Coxal vestiture dark brown or brownish yellow; metatibia with smaller spur strongly curved, subacute; scutellum with welldefined submarginal groove or punctures.................................................................. 5

5. Coxal vestiture brownish yellow; pronotum lacking anteromedial swelling, surface strongly convex; pygidium contracted either side of apex, disc with impunctate median stripe................................... C. bidens (Blackburn, 1896)

- Coxal vestiture dark brown (Fig. 12); pronotum (Figs. 11, 14) with anteromedial swelling, surface slightly flattened behind swelling; pygidium (Fig. 16) not contracted on either side of apex, disc lacking impunctate median stripe.......................................................................................... C. sculpturatus Blackburn, 1888