Key to the genera of Formicinae occurring in the UAE (workers)

1 Antennae 12 segmented .................................................................................................... 2

– Antennae 11 segmented. .................................................................................................... 5

2 Antennal insertions clearly distant from posterior clypeal margin (Figs 5 & 39) .............. 3

– Antennal insertions close to or contiguous with clypeal margin (Figs 40 & 41)................ 4

3 Petiole with spines or teeth ..................................................................... Polyrhachis Smith

– Petiole entire or emarginated, never dentate ......................................... Camponotus Mayr

4 Ocelli present and distinct (Fig. 40). Head underneath with long curved hairs anteriorly. Body with normal hairs (fine, not stout) ............................................. Cataglyphis Foerster

– Ocelli vestigial or absent. Underside of head with short hairs only. Body with stout suberect pairs of hairs ................................................................ Paratrechina Motschulsky

5 Propodeum bidentate or bituberculate; petiole incised and usually bidentate (Fig. 41) ....... ................................................................................................................. Lepisiota Santschi

– Propodeum unarmed, petiole simple ................................................................................. 6

6 Palp formula 5, 3 or less ............................................................................ Acropyga Roger

– Palp formula 6, 4 ............................................................................................................... 7

7 In dorsal view metanotum separated from mesonotum by a deeply impressed suture (Fig. 42) ............................................................................................................ Plagiolepis Mayr

– Metanotum not distinguished by sutures; mesapropodeal furrow shallow (Fig. 43) ............ ............................................................................................................. Anaplolepis Santschi