The Formicidae (Hymenoptera) of Fennoscandia and Denmark. Collingwood, C. A. Fauna Entomologica Scandinavica 1979 8 1 174 JGK 40139 urn:lsid:biosci.ohio-state.edu:osuc_concepts:2250 Dolichoderinae Forel 32 subFamily Dolichoderinae  This subfamily includes fifteen genera with the greatest number of species distributed through the tropics. The sting is vestigial or absent but many species have poison glands that excrete a repellent fluid through the anal orifice. The gaster has a reduced number of segments compared with Formicinaeand Ponerinae of which four only are visible in dorsal view in the female castes and five in the males. Pupae are not protected by cocoons. The two genera treated here both belong in the tribe Tapinomini.    Keysto genera of Dolichoderinae Queens and workers 1 Petiole scale well developed, not obscured by overhanging gaster; front border of clypeus convex and entire (Fig. 20)................................. IridomyrmexMayr (p. 33) - Petiole a small node overhung by first gastral segment; front border of clypeus straight, incised or concave (Fig. 22) ............................ TapinomaForster (p. 34) Males 1 Petiole scale well developed. Scape short, not reaching occipital margin IridomyrmexMayr (p. 33) - Petiole a reduced node. Scape long, overreaching occipital margin TapinomaForster (p. 34)