Key to Forelophilus species

The following key to Forelophilus species is based on Zettel & Zimmermann (2007).

1

 * Antenna yellow or orange, or scape only partly infuscated. Tarsi relatively wide. Erect setae numerous, all over vertex in frontal view of head => Forelophilus philippinensis
 * Scape brown or blackish and at least first segment of flagellum infuscated. Tarsi relatively slender. Erect setae not so numerous, restricted to medial part of vertex in frontal view of head => 2

2

 * Tibiae without erect setae. In minor worker, anterior margin of clypeus straight. Petiolar node narrowly rounded in lateral view => Forelophilus stefanschoedli
 * Tibiae with erect setae. In minor worker, anterior margin of clypeus with short medial lobe. Petiolar node broadly rounded in lateral view => Forelophilus overbecki