Key to Cephalotes Species

1

 * Vertexal angles bispinose . . . . . 2


 * Vertexal angles differently shaped but never with spines . . . . . 8

2
return to couplet #1
 * Eyes below the antennal scrobes. Vertex without denticles . . . . . 3


 * Eyes behind the antennal scrobes. Vertex with a small pair of denticles . . . . . 6

3
return to couplet #2
 * Mid and hind basitarsi abruptly narrowing distally in lateral view. Frontal carinae strongly crenulate. Body opaque. Brazil, Peru . . . . . Cephalotes serraticeps


 * Mid and hind basitarsi not strongly narrowing distally . . . . . 4

4
return to couplet #3
 * CI ≤ 122. Frontal carinae not covering completely the genae. Costa Rica, Panama . . . . . Cephalotes alfaroi


 * CI ≥ 127. Frontal carinae covering completely the genae . . . . . 5

5
return to couplet #4
 * Gaster, ventrally, with sparse, pointed hairs. From Costa Rica to Argentina, Belize?, Virgin Islands? . . . . . Cephalotes atratus


 * Gaster, ventrally, densely covered with pointed hairs. Guyanas, Colombia, Brazil . . . . . Cephalotes marginatus