Fainia Zumpt, 1958 Figs 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13

Type species.

Idia albitarsis Macquart, 1846, by original designation.

Diagnosis.

Head. Arista dorsally pectinate, male eyes separated at narrowest point by less than width of ocellar triangle. Thorax. Anepisternum with two upper posterior setae and dense yellow microtomentum; katepisternum with or without yellow microtomentum; thoracic chaetotaxy reduced (presutural acrostichal, dorsocentral and intra-alar absent and postsutural acrostichal and dorsocentral setae restricted to prescutellars). Legs. First tarsomeres always light cream-coloured; fore tibia without submedial posteroventral setae; hind tibia with 2-3 anterodorsal setae as long as tibial diameter, but not forming a distinct row (Fig. 10I). Male mid femur with a distal posteroventral row (ctenidium) of closely spaced spine-like setae (Fig. 5J; this character is also found in some Stomorhina species, such as S. apta Curran, 1931 and S. malobana (Lehrer, 2007c)). Wing. Cell r4+5 always open. Male terminalia. Tergites 5 and 7+8 connected by a long retractile membrane (Fig. 5I), tergite 6 not sclerotised, spiracle 6 present, cerci fused (Figs 2B, 6A, 7A, F, 9A, 11A, 12A) and sternite 5 divided into three posterior lobes (Figs 3, 6F, 7C, I, 9F, 11F, 12F).

Redescription.

♀♂ Head (Figs 5A-D, 8A-D, 10A-D, 13D-I). Fronto-orbital plate and parafacial ground colour black, covered with silvery microtomentum; parafacial with a glossy black spot; face ground colour black-brown, covered with silvery microtomentum, facial carina protruding (narrow or broad); lower face margin visible in profile, non-rounded, strongly protruding beyond antennal insertion; pedicel and postpedicel ground colour black-brown; arista pectinate, basally yellow and distally dark brown; vibrissa short and thick, 2-4 supravibrissal setulae adjacent to vibrissa; genal dilation anteriorly glossy black and bare, posteriorly covered with dense yellow microtomentum with hairs, generally with tiny piliferous dots around insertion of each hair; occipital area behind postocular setae with a bare and shiny broad black margin. Thorax (Figs 5G, H, K, L, 8G, K, J, K, 10G, H, J, K, 13A-F). General colouration dark olive green with 3 longitudinal dorsal dark vittae, hair insertions with small piliferous dots; pleura covered by dense yellow microtomentum (in different extension degrees); dorsal chaetotaxy reduced, presutural acrostichal, dorsocentral and intra-alar setae absent and postsutural setae reduced to prescutellars and supra-alar; 2 (outer and anterior) post-postpronotal setae present, postalar wall and suprasquamal ridge bare. Wing (Fig. 4E). Cell r4+5 always open. Legs (Figs 5J-L, 8J, K, 10I-K). Femora reddish-yellow; male mid-femur bearing a distal posteroventral row (ctenidium) of closely spaced setae (Fig. 5J) that are spine-like in male but not in female; tibiae yellow to brown; first tarsomeres creamy white; first and second hind tarsomeres creamy, almost white. Abdomen (Figs 5E, F, K, L, 8E, F, J, K, 10E, F, J, K). Longer than broad, extending to wing tip or even further; colour generally yellow-orange and sometimes partly brown. Male terminalia (Figs 1 - 3, 6, 7, 9, 11, 12). Sternite 5 divided into three posterior lobes, 2 outer and 1 median. Outer lobes elongated and posteriorly slender or broad, tending to an inward curve (Figs 3, 6F, 7C, I, 9F, 11F, 12F), with or without abundant setae of different lengths and thickness; medial lobe forming a broad protuberance of varied shape (Figs 3, 6F, 7C, I, 9F, 11F, 12H). Phallus with basi- and distiphallus not fused and connected through a membrane (connection membrane) (Fig. 1A-C); epiphallus absent; basiphallus with two anterolateral processes; ventral plate articulate; paraphallus distally globular.