Metasternal

Paxillus MacLeay, 1819 can be recognized by anterior angles of clypeus, in dorsal view, not visible, very reduced, completely under the frons; external tubercles with an acute apex, directed downwards; prosternal process always pentagonal; metasternal disc glabrous and wholly delimited (Reyes-Castillo, 1973).

The prosternal plate has three setae, and the metasternal plate nine to thirteen setae.

Metasternal plate middle-sized, fusiform shaped, with one pair of setae St4 (80-85).

28 and 29), of meso- and metasternal A2 = 1 [micro]m (Figs.

Prosternai spines are delicate and short (shorter than the clypeus hornlets), mesosternal lobes are pointed and erected, metasternal ones broadly rounded, and the metasternal pit is transverse, short, and deep (divided by a thin medial ridge).

Meso and metasternal lobes elongate, divided by acute notch, pointed apically.

palmyra for the present, because they possess the distinctively concave posterior metasternum, a small and bidentate posteromedial metasternal process, and a basally incised fore tibia, but have not designated them as paratypes because of the significant geographic distance separating the two populations, which suggests that the Pagan population may eventually prove to be a distinct species once additional material is available for a more detailed evaluation.

spinifer Percheron differ by having large, circular, deep and scored mesoesternal fossae; the metasternal disc is delimited by spaced punctuations not detached to the sides, while P.

Metasternal process strongly convex in lateral view.