Review of Australian Sarginae Soldier Fly Genera (Diptera: Stratiomyidae), with First Records of Cephalochrysa, Formosargus and Microchrysa Author Lessard, Bryan D. Australian National Insect Collection, National Research Collections Australia, CSIRO, PO Box 1700, Canberra ACT 2601, Australia Author Yeates, David K. Australian National Insect Collection, National Research Collections Australia, CSIRO, PO Box 1700, Canberra ACT 2601, Australia Author Woodley, Norman E. Department of Entomology, Smithsonian Institution, c / o 8920 S Bryerly Ct., Hereford, AZ 85615, United States of America text Records of the Australian Museum 2020 2020-06-24 72 2 23 43 journal article 10.3853/j.2201-4349.72.2020.1683 2201-4349 4654320 184539DF-E8DD-4A48-8E38-70B7860D6134 Genus Cephalochrysa Kertész, 1912 Fig. 3 Cephalochrysa Kertész, 1912: 99 . Type species Sargus hovas Bigot, 1859 , by original designation. See Woodley (2001: 186) for full synonymy. Diagnosis . Moderately sized (length 7 mm ), metallic purplish blue flies, with the occiput well-developed dorsally in females, and ocelli in the form of an equilateral triangle. Regarding the Australian fauna, it is most similar to Microchrysa , but can be distinguished by the: larger size; head dorsoventrally compressed in anterior view, about 0.6 times as high as wide; lower frons with a distinct triangular callus diverging ventrally towards base of antennae; basal complex of antennal flagellum somewhat large; and more strongly developed veins M 2 , M 3 , and M 4 . Distribution . Bathurst Island, NT, new distribution ( Fig. 2 ). Remarks . Sargus gselli Hill, 1919 is congeneric with Cephalochrysa , sharing the following: head being much wider than high, ocelli forming an equilateral triangle and occiput without a posteriorly projecting fringe of hair-like setae. The general appearance of S. gselli is extremely similar to other species of Cephalochrysa known from Pacific islands, as well as the type species. Therefore, we transfer this species from its previous position in Sargus to become Cephalochrysa gselli ( Hill, 1919 ) comb. nov. , the first record of Cephalochrysa from Australia . Catalogue of Australian species Genus Cephalochrysa Kertész, 1912 gselli ( Hill, 1919 ) comb. nov. NT. Sargus gselli Hill, 1919: 459 . HT ♀ [SAMA 29- 003393; missing right wing; Fig. 3 ]: NT, Bathurst Island. The whereabouts of this specimen was previously unknown ( Woodley, 2001: 224 ).