Abstract
The present study describes, illustrates two new species of the subgenus Petrobia (Petrobia), P. (P.) arabica sp. nov. and P. (P.) tabarjalensis sp. nov., collected in the Northern Region (Jouf) of Saudi Arabia They were found inhabiting wild host plants, Haloxylon salicornicum (Amaranthaceae) and Chrozophora sp. (Euphorbiaceae), respectively. http://www.zoobank.org/urn:lsid:zoobank.org:pub:BB89B241-950D-446F-9207-E25A39345E1B