Revision of the ant genus Anillomyrma EMERY, 1913 (Hymenoptera: Formicidae: Myr-micinae: Solenopsidini)

The ant genus Anillomyrma EMERY, 1913 is revised based on the type and new materials from Vietnam and the Philip-pines. Anillomyrma decamera ssp. continentis WHEELER, 1927 described from Vietnam is a junior synonym of A. deca-mera (EMERY, 1901) described from Sri Lanka. Anillomyrma decamera is newly recorded from the Philippines. Anillo-myrma tridens BOLTON, 1987 has so far been known only from the type series, and it is morphologically very similar to A. decamera. The conspicuous morphological characters separating the two species are as follows: masticatory margin of mandible 3-toothed in A. tridens but 4-toothed in A. decamera; 3rd tooth much larger than the 2nd in A. tridens but almost as large as the 2nd in A. decamera; posterior slope of propodeum in lateral view expanded posterodorsad more strongly in A. tridens than in A. decamera; petiolar peduncle in lateral view more slender in A. tridens than in A. deca-mera. The genus is relatively well diagnosed from the other genera of the Solenopsis WESTWOOD, 1840 genus group by the shape of clypeus, condition of eye, antennal and palpal segmentations, shape of promesonotum, forecoxa and petiole, segmentation between postpetiole and 1st gastral segment, and condition of sting.