Monomorium (Hymenoptera: Formicidae) of the Arabian Peninsula with description of two new species, M. heggyi sp. n. and M. khalidi sp. n

We present a revised and updated synoptic list of 44 Arabian species, including two new species of the species-group: , and We propose the following new synonyms: André (= Collingwood & Agosti ; Santschi (= Collingwood & Agosti , Collingwood & Agosti Collingwood & Agosti ; Emery (= Santschi ; Collingwood & Agosti (= Collingwood & Agosti ; Emery (= Collingwood & Agosti ; and Emery (= Collingwood & Agosti ). An illustrated key and distribution maps are presented for the treated species. Ecological and biological notes are given when available. The majority of Arabian species (24) are endemic to the peninsula. All except one of the remaining species are more broadly ranging Afrotropical and Palearctic species, supporting the view of Arabia as a biogeographical crossroads between these two regions. (Jerdon), the sole species of Indomalayan origin, is recorded for the first time from the Arabian Peninsula.