1a. Small, brownish, no obvious sculpture, petiole lacking a scale Tapinoma sessile
1b. Black body, scale on petiole convex 2 (Dolichoderus)
2a. Bicolored: head and thorax red; gaster black D. mariae
2b. Not bicolored 3
3a. Scape with more than 10 erect hairs D. plagiatus
3b. Scape without hairs; head smooth and shiny 4
4a. Mesoscutum and mesopleuron punctate; petiole longer than wide D. pustulatus
4b. Mesoscutum and mesopleuron shining; first gastric tergite with 10+ hairs, petiole subquadrate D. taschenbergi
Tapinoma sessile
