The Dromiusina Bonelli, 1810 of southwestern Saudi Arabia with description of a new species (Coleoptera, Carabidae, Lebiini) Author Rasool, Iftekhar Author Abdel-Dayem, Mahmoud S. Author Felix, Ron F. F. L. Author Aldhafer, Hathal M. text ZooKeys 2018 771 73 103 http://dx.doi.org/10.3897/zookeys.771.24165 journal article http://dx.doi.org/10.3897/zookeys.771.24165 1313-2970--73 E06BCC5814E445159B6198EBD9F035CA Microlestes Schmidt-Gobel, 1846 Type species. Microlestes inconspicuus Schmidt-Goebel , 1846 The genus Microlestes is the largest genus of Dromiusina encompass about 130 species all over the world ( Lorenz 2005 , Anichtchenko 2017 ), distributed in Palaearctic (Middle East and Asia), Nearctic, Afrotropical, Oriental and Neotropical regions ( Mateu 1971 , Bousquet 2012 ). Kabak (2003 , 2017 ) in his catalogue, mentioned 63 Microlestes species from Palaearctic region. The members of Microlestes can be distinguished from other related genera in Dromiusina by the combination of the characters: small sized beetle ranges from 2.30-3.40 mm; labrum truncate at anterior margins; mentum without median tooth; pubescence of antennae starts from antennomeres III; lateral margins of pronotum sinuated posteriorly, base of pronotum weakly incised and curved towards hind angles and rounded in the middle; basal tarsomere of hind legs distinctly longer than last, claws sparsely dentate; elytra parallel sided and transversally truncated at apex ( Lindroth 1974 , Bousquet 2010 ). So far eight species have been known from Saudi Arabia ( Mateu 1979 , 1986 , Kabak 2003 , 2017 ). Only two species Microlestes infuscatus fragilis Mateu, 1956 and Microlestes glabrellus ( Reitter 1901 ) are occuring in the southwestern part of the country ( Mateu 1986 ). In the present study, Microlestes discoidalis ( Fairmaire 1892 ) is also newly recorded from the southwest of Saudi Arabia.