(2) Apterostigma auriculatum Wheeler, 1925

Figure 2C, D

Material examined. COLOMBIA: Antioquia • 1 worker; Amalfi; 06°54′11″N, 075°05′26.7″W; alt. 1045 m; 20 Apr. 1998; F. Sernaleg.; UNAB 4361 .

Identification. Eyes relatively big and prominent (more than nine ommatidia along the shortest axis); frontal lobes subquadrate in full-face view, anterior margin of clypeus concave, lacking shiny cuticular strip; neck relatively long and broad, lacking median carina; hu- meral prominence in dorsal view shaped as angular lobe; ventral mesopleural carina in lateral view fine; and pet- iole in lateral view triangular, with antero- and posterodorsal profiles almost of same length (Lattke 1997).

Distribution. This species occurs from Honduras to Mato Grosso do Sul in Brazil and is widely distributed throughout central and northwestern South America (Lattke 1997; Fernández and Sendoya 2004).