(9) Apterostigma ierense Weber, 1937

Figure 4A, B

Material examined. COLOMBIA: Vaupés • 1 worker; Taraira; 01°04′00″S, 069°31′00″W; alt. 85 m; 14–20 May 2001; A. Sabogal leg.; UNAB 4742 .

Identification. Lateroventral margin of frontal lobes completely curved and covering the antennae inser- tions; the cervical carina in dorsal view is shaped as two rounded lobes; and body densely pubescent (Lattke 1997).

Distribution. Apterostigma ierense is mostly distributed in the Amazon basin, being reported from Bolivia, Bra- zil, Colombia, Ecuador, Peru, and Venezuela. In Central America, A. ierense is only known from Panama (Kempf 1972; Lattke 1997; Mayhé-Nuñes and Jaffé 1998; Fernán- dez and Sendoya 2004).