A revision of the Egyptian species of the genus Actorthia Kröber (Diptera: Therevidae: Phycinae) Badrawy, Haitham B. M. Mohammad, Salwa K. Zootaxa 2013 3613 2 181 189 NTH 95080 Krober, 1912 Krober 1912 [238,523,1191,1217] Insecta Therevidae Actorthia Animalia Diptera 1 182 Arthropoda genus   ActhortiaKröber, 1912: 30. Incorrect spelling.   GyrophthalmusBecker, 1912: 311. Type-species:  Gyrophthalmus khedivialisBecker, by monotypy. (Synonymy by Kröber 1924.)   LesneusSurcouf, 1921: 161. Typespecies:  Lesneus canescensSurcouf, by monotypy. (Synonymy by Lyneborg 1983.)  GyrophthalminusFrey, 1936: 52. Typespecies:  Actorthia ahngeriFrey, by original designation. (Synonymy by Lyneborg 1983.)   Remarks:  Actorthiais a problematic genus and reliable synapomorphic characters are lacking compared with other therevid genera. The genus is characterized by its small to medium body size; relatively broad body shape; antenna shorter than head; flagellum narrower than scape; style stout, two-segmented; prosternal depression with or without setae; vein C ending at CuA2+A1; veins M2 and M3 reaching to wing margin; cell r4 wide; absence of a hind coxal knob; gonocoxites fused; hypandrium large, free; gonocoxites with lateral extensions; epandrium with posterolateral corners folded inside and covered with setae. Three species are found in the Egyptian fauna (  Actorthia frontata(Kröber),  A. micans(Kröber)and  A. pulchellaKröber).  Actorthia khedivialis(Becker, 1912)is newly synonymized with  A. frontata(Kröber, 1912)and  Actorthia efflatouniKröber, 1925is confirmed as a synonym of  A. micans(Kröber, 1923). The typespecimens of the all the species of  Actorthiadeposited in (ESEC) have been destroyed by dermestid beetles. The wing venation of  Actorthiais most similar to the venation of  Efflatouniellaspecies (except  Efflatouniella aegyptiacaKröber),  PhycusWalkerand  SalentiaCosta in that vein C ends at CuA2+A1. The wing is transparent in  Actorthiabut is maculated in most  Efflatouniella. The length of the antenna is shorter than the head in  Actorthiabut is equal to or longer than the head in the other two genera  Phycusand  Salentia. The antenna is shorter than the head and is shared by  Actorthiaand  RuppelliaWiedemann, but the latter genus is distinguished from  Actorthiaby having vein C ending at M2. It is morphologically similar to  Ruppellia, but  Ruppelliadoes not have the extensions of the gonocoxites (except  R. thoracica(Macquart)). The male genitalia of  Actorthiaare most similar to the genitalia of  AcathritoLyneborg, but the latter genus is distinguished from  Actorthiaby having vein C ending at M1 and by possessing a hind coxal knob, which is absent in  Actorthia.