Harpegnathos

David Emmanuel M. General, 2016, A review of the ant genus Harpegnathos Jerdon, 1851 (Hymenoptera: Formicidae) in the Philippines, with the description of two new species, Halteres 7, pp. 99-105 : 104

Key to the Philippine species of Harpegnathos , based on the worker

1. Dorsum of head reticulo-punctate; mandibles converging rather abruptly from attachments……………………………..2

- Dorsum of head striate; mandibles converging gradually from attachments……………………… …… ..3

2. Sculpture on dorsa of pronotum, mesonotum, propodeum and petiole reticulo-punctate; pilosity on body moderately abundant……….. H. venator rugosus Mayr

- Sculpture on dorsum of pronotum with irregular striae diverging posteriorly; dorsum of mesonotum with irregular but subparallel striae; dorsum of propodeum coarsely punctuate; petiole with dorsal and lateral coarse punctation; pilosity on body sparse ………………….... H. alperti sp. n.

3. First and second gastral tergite with coarse punctation over underlying punctulation; in full-face view, posterior margin of head straight; mandibles orange with infuscated base ………. H. honestoi sp. n.

- First and second gastral tergite with punctulation only; in full-face view, posterior margin of head shallowly emarginated; mandibles concolorous yellow……………………………………4

4. Antennal scape barely exceeds posterior margin of head by about the width of scape; propodeal declivity bounded by lateral carinae; pilosity on body sparse...................... H. empesoi Chapman

- Antennal scape exceeds posterior margin of head by almost 1/3 length of scape; propodeal declivity not bounded by lateral carinae; pilosity on body moderately abundant….......................... H. macgrego ri Wheeler & Chapman