taxonID	type	description	language	source
0964E465FF97206B6BD5453AFB610A85.taxon	diagnosis	Diagnosis. (modified from Emden 1951). Length: 6.8 – 9.4 mm. Ocellar setae present; fronto-orbital plate narrower than frontal vitta; profile of head at antennal base much longer than at mouth margin, forming an acute angle (Fig. 4, modified from Fig. 54 of Emden 1951); proboscis stout and bulbous, dusted; facial ridges with few setulae near vibrissa; claws small; dorsocentral presutural 1; katepisternals 1: 1; presutural intra-alar seta absent; posterior intralar seta absent. Anepimeron bare. Mid tarsus of male compressed and slightly dilated, the anterior surface with dense pale golden yellow dust, which is interrupted by a longitudinal row of setae. Hind tibia without posterodorsal seta. Claws small. Note. Described from male and female from Uganda, collected in Namwamba Valley, at 6,500 ft. and 10,200 ft. One male is labelled: on stones in small rapid stream (Emden 1951). Deposited at NHMUK.	en	Couri, Márcia Souto, Sousa, Viviane Rodrigues De, Gomes, Marina, Gil-Azevedo, Leonardo H. (2025): The puzzling genus Xenomyia Malloch (Diptera, Muscidae): taxonomic notes, key to species and redescription of Xenomyia hirtibasis (Bigot). Zootaxa 5570 (2): 260-280, DOI: 10.11646/zootaxa.5570.2.2, URL: https://doi.org/10.11646/zootaxa.5570.2.2
0964E465FF9720686BD5476EFC3F0E91.taxon	diagnosis	Diagnosis. (modified from Malloch 1921). Length: 10 mm. Black, shining with bluish-grey pruinescence. Head of female as in Fig. 5. (modified from Fig. 53 of Emden 1951); black, frons velvety black; face, parafacial and gena with whitish pollinosity. Antenna black; palpus yellow. Dorsum of scutum velvety brownish black, most of pleura grey pruinescent. Legs black. Wings slightly smoky, calypter brown, margins fuscous. Halteres bright yellow. Frons a little over one-third of head-width; orbits not clearly differentiated; ocellar setae present; fronto-orbital plate narrower than frontal vitta; proboscis stout and bulbous, dusted; anepimeron bare; postpedicel about three times as long as pedicel, tapered from middle to apex; arista long and slender; gena about as high as width of postpedicel. Postsutural dorsocentrals 3, katerpisternals 1: 1. Legs long and slender. Fore and mid tibia, each with one anterodorsal and one posterodorsal seta; hind femur with very short weak anteroventral setae; hind tibia with 1 anteroventral, 1 anterodorsal and 1 posterodorsal setae. crossvein r – m at middle of discal cell. Lower calypter much longer than upper. Note: Described from male and female from Kenya (NHMUK and MNHN) at 8,300 ft., forest area. Emden (1951) considered Jeanneliotis notabilis Séguy as a junior synonym of X. atra. According to him, the description of J. notabilis by Séguy (1941) gives enough details to consider them the same species. Moreover, they were collected in the same mountain, and the male of X. atra and the female of J. notabilis are unknown. The morphological differences between them, especially in the shape on the head (Fig. 6, modified from Fig. 52 of Emden 1951) are probably sexual differences as occuring in other species of the genus. As commented in the introduction, Hennig (1965), who observed the type of Jeanneliotis in Paris, considered this synonym poorly substantiated and according to him it is not even possible to determine whether this genus belong to the Limnophorinae. At the time of the original description, Séguy (1941) constituted an independent subfamily to it.	en	Couri, Márcia Souto, Sousa, Viviane Rodrigues De, Gomes, Marina, Gil-Azevedo, Leonardo H. (2025): The puzzling genus Xenomyia Malloch (Diptera, Muscidae): taxonomic notes, key to species and redescription of Xenomyia hirtibasis (Bigot). Zootaxa 5570 (2): 260-280, DOI: 10.11646/zootaxa.5570.2.2, URL: https://doi.org/10.11646/zootaxa.5570.2.2
0964E465FF9420686BD5435BFE2F0CC1.taxon	diagnosis	Diagnosis. (modified from Emden 1951). Length: 5.8 – 6.7 mm. Ocellar setae absent; fronto-orbital plate much broader than frontal vitta, densely covered by short setulae; postpedicel round at apex; proboscis slender and glossy black; antenna and palpus black, long and slender; prosternum bare; superior frontal seta absent; acrostichals present; dorsocentrals 2: 3; katepisternals 1: 2; presutural intra-alar seta present; anterior intralar seta strong, posterior weak. Anepimeron bare. Fore tibia without median seta. Hind tibia with an anterodorsal and an anteroventral setae, without posterodorsal. Claws moderately long, not longer than antenna. Note. Described from 2 syntypes female from Uganda, Bwamba Pass (west side), 5,500 – 7,500 ft. (Emden 1951). Deposited at NHMUK.	en	Couri, Márcia Souto, Sousa, Viviane Rodrigues De, Gomes, Marina, Gil-Azevedo, Leonardo H. (2025): The puzzling genus Xenomyia Malloch (Diptera, Muscidae): taxonomic notes, key to species and redescription of Xenomyia hirtibasis (Bigot). Zootaxa 5570 (2): 260-280, DOI: 10.11646/zootaxa.5570.2.2, URL: https://doi.org/10.11646/zootaxa.5570.2.2
0964E465FF9420686BD542ABFCF80A39.taxon	diagnosis	Diagnosis. (modified from Emden 1951). Length: 7.5 – 8.5 mm. Ocellar setae present; fronto-orbital plate narrower than frontal vitta; proboscis stout and bulbous, dusted; facial ridges with few setulae near vibrissa; profile of head at antennal base not longer than at mouth margin, forming an obtuse angle. Several rows of occipital hairs. Eyes oblique. Anepimeron bare. Hind tibia without anterodorsal seta. Claws moderately long, not longer than antenna. Dorsocentrals 2: 3. Katepisternals 1: 1. Presutural intra-alar absent or small. Fore tibia with posterior seta. Hind femur with two short spines in basal two-fifth (Fig. 16 (modified from Fig. 50 of Emden 1951). Hind tibia anterodorsal seta absent in male and present in female. Abdomen subcylindrical with apex truncated in lateral view (Fig. 26 (modified from Fig. 51 of Emden 1951). Note. Described from male and female from Uganda, Namwamba Valley at 10,200 ft. (Emden 1951) (NHMUK). Known geographical distribution, South Africa and Uganda.	en	Couri, Márcia Souto, Sousa, Viviane Rodrigues De, Gomes, Marina, Gil-Azevedo, Leonardo H. (2025): The puzzling genus Xenomyia Malloch (Diptera, Muscidae): taxonomic notes, key to species and redescription of Xenomyia hirtibasis (Bigot). Zootaxa 5570 (2): 260-280, DOI: 10.11646/zootaxa.5570.2.2, URL: https://doi.org/10.11646/zootaxa.5570.2.2
0964E465FF9420686BD544B3FCFE0831.taxon	diagnosis	Diagnosis. (modified from Emden 1951). Length: 5.0 – 6.6 mm. Ocellar absent; fronto-orbital plate much broader than frontal vitta, densely covered by short setulae; postpedicel round at apex; proboscis slender and glossy black; antenna and palpus black, long and slender; arista very short (Fig. 7, modified from Fig. 56 of Emden 1951); prosternum bare; superior frontal seta absent; acrostichals present; dorsocentrals 1: 2; katepisternals 1 + 2, the posterior seta very strong; presutural intra-alar seta absent; two intralar fine. Anepimeron bare. Fore tibia without median seta. Hind tibia with an anterodorsal seta, without posterodorsal. Wings spotted Lower calypter elongate, more than twice as long as wide (Fig. 21, modified from Fig. 7, plate X of Emden 1951). Claws a little long. R 1 bare. Head and thorax in lateral view as in Fig. 7 (modified from Fig. 56 of Emden 1951). Note. Described from male and female from Kenya (Mt. Elgon, Swam River at 5,000 ft) and Uganda (Mobuku River at 4,000 ft, on rocks) (Emden 1951) (NHMUK, SDEI),	en	Couri, Márcia Souto, Sousa, Viviane Rodrigues De, Gomes, Marina, Gil-Azevedo, Leonardo H. (2025): The puzzling genus Xenomyia Malloch (Diptera, Muscidae): taxonomic notes, key to species and redescription of Xenomyia hirtibasis (Bigot). Zootaxa 5570 (2): 260-280, DOI: 10.11646/zootaxa.5570.2.2, URL: https://doi.org/10.11646/zootaxa.5570.2.2
0964E465FF9B20676BD541EFFD5F0D22.taxon	diagnosis	Diagnosis. (modified from Emden 1951). Length: 6.1 – 7.7 mm. Head of male and female, respectively in Figs 8 and 9 (modified from Figs 57 and 58 of Emden 1951). Ocellar absent; fronto-orbital plate much broader than frontal vitta, densely covered by short setulae; postpedicel round at apex; proboscis slender and glossy black; antenna and palpus black, long and slender; arista short (Figs 8 and 9, modified, respectively from Figs 57 and 58 of Emden 1951); prosternum setulose; superior frontal seta absent; acrostichals present; dorsocentrals, only the last strong; katepisternals 0: 2; presutural intra-alar seta absent; two intralar weak. Anepimeron bare. Fore tibia without median seta. Hind tibia with an anterodorsal seta, without posterodorsal. Wings spotted (Fig. 22, modified from Fig. 4, plate 1 of Emden 1943). Lower calypter fuscous. Halter yellow. Claws a little long. R 1 setulose. Note. Described from male and female from Uganda, Mobuku River, at circa 4,000 ft, and from Kenya in Swam River at 5,000 ft., on rocks “ wetted by spray in the both parts of the two rivers ” (Emden 1951) (NHMUK). Known geographical distribution, Kenya and Uganda.	en	Couri, Márcia Souto, Sousa, Viviane Rodrigues De, Gomes, Marina, Gil-Azevedo, Leonardo H. (2025): The puzzling genus Xenomyia Malloch (Diptera, Muscidae): taxonomic notes, key to species and redescription of Xenomyia hirtibasis (Bigot). Zootaxa 5570 (2): 260-280, DOI: 10.11646/zootaxa.5570.2.2, URL: https://doi.org/10.11646/zootaxa.5570.2.2
0964E465FF9B20636BD543CBFCC20EED.taxon	description	Redescription Male. Length: body: 4.5 – 6 mm; wing: 4.0 – 5.0 mm. (Figs 46 – 48) Color: General color brown, with greyish-blue pollinosity. Frontal vitta and fronto-orbital plate velvety dark brown. Face and gena grey-blue pollinose. Antennae, arista and palpus dark brown. Scutum and scutellum dark brown, subshining, with postpronotum and notopleuron greyish-blue pollinose. Pleura greyish-blue pollinose, upper half of anepisternum dark brown. Calypters creamy-white. Halter yellow. Wing smoky brown. Legs brown with greyish-blue pollinosity. Abdomen dark brown, with lateral greyish-blue pollinose areas in all tergites. Head (Figs 10 and 11): Frontal vitta broad; fronto-orbital plate narrow. Eye bare. Ocellar setae present, well-developed. Inner and outer vertical setae strong. Postpedicel short, about 1.5 times the length of the pedicel. Arista long, pubescens, enlarged on basal third. Vibrissae long, with vibrissal setulae. Gena tall, about one third of eye height. Proboscis stout and bulbous, dusted, labellum with pairs of stout teeth (Fig. 48). Palpus somewhat dilated apically, flattened, slightly spoon-shaped. Thorax: Acrostichal absent. Dorsocentrals 2: 3. Intra-alars 1 + 0. Supra-alars 1, prealar absent. 1 postpronotal (the outer), the lobe covered with short dense setulae. Prosternum bare. Postpronotal 1, long. Notopleuron with 2 setae, the posterior seta one-third longer than anterior seta, without setulae. Anepisternum without a short seta in upper anterior corner. Katepisternals 1 + 1, the upper posterior seta strong. Anepimeron, katepimeron, meron, katatergite and anatergite bare. Posterior spiracle without setae on margins. Scutellum with a pair of sub-basal lateral and apical setae, the apical seta one-third longer than the basal seta; disc sparsely setulose, lateral margins and ventral surface bare. Legs: (Figs 17 and 46) Fore coxa greatly developed and with a dense tuft of numerous long fine setae on anterior surface; mid coxa with a row of long seta, mid femur with 4 – 6 fine and long posteroventral setae near base followed by a row of 7 – 8 pointed setae until two-thirds of the length. Hind femur with 3 – 5 long anteroventral setae on apical two-thirds. Hind tibia with a very long anterodorsal seta on basal third (Fig. 17). All tarsi long with claws long and strong. Wing (Figs 23 and 46): Membrane completely covered with microtrichia. Greater ampula dark brown. Veins bare except Costa. Both calypters glossiform, lower one about 1.4 times the length of the upper one. Abdomen. Tergites with row of fine setae at margins of all tergites. Genitalia (Figs 27 – 32): Sternite 5 a little taller than wide, with a deep anterior margin (Fig. 27). Sternite 6 asymmetric (Fig. 28). Cercal plate partially divided and surstylus as long as cercal plate (Figs 29 and 30). Aedeagus with the epiphallus well-developed; phallapodeme long, narrow; pregonite long; postgonite shorter than pregonite; distiphallus membranous at apex (Figs 31 and 32). Female: Similar to male, mainly differing in leg chaetotaxy. (Figs 49 – 51). Legs: Fore coxa without a dense tuft of numerous long fine setae on anterior surface. Mid and hind femora practically without differentiated setae, except for a fine preapical dorsal seta on both femora. Hind tibia with the anterodorsal seta on basal third short and fine. Ovipositor (Figs 39 and 40): Long, all tergites broad, well-developed, cercus about twice longer as long as the epiproct, with long setae on outer margin. Sternite 6 elongate-rectangular; sternite 7 a small plate; sternite 8 absent. The membrane between sternites 7 and 8 with microtrichia. Three rounded spermathecae. Material examined. SOUTH AFRICA: Western Cape, Stellenbosch, Jonkershoek NR, t. Tweede Waterval, Eerste R., S 33 o 59 ’ 44.7 ” E 18 o 58 ’ 52.0 ”, 408 m, 02 / xii / 2018, LHGA & ACM, LHGA 201812022, 1 male and 1 female (MNRJ); Af. Eerste River, 325 m, S 33 o 57 ’ 55.47 ” E 18 o 55 ’ 55.95 ”, 02 / xii / 2018, LHGA & ACM, LHGA 201812021, 1 male (MNB); Tulbagh, Groot Winterhoek, Klein Wk, Secret Falls, 388 m, S 33 o 10 ’ 53.7 ” E 19 o 07 ’ 20.9 ”, 05 / xii / 2018, LHGA & ACM, LHGA 201812051, 1 male, 1 female (MNRJ), 2 females (NMB). All in good conditions. Although adults were not observed preying, they were seen flying over areas where immature Simuliidae were collected. Note. Described from male and female from South Africa, Cape, Cape of Good Hope. (OUMNH). The original description, in the genus Lispe, is very brief. Stein (1907) redescribed the species with more details mainly on the leg chaetotaxy and mentioned that the absence of setae on anepimeron should better positioned it in the genus Melanochelia Rondani (= Limnophora Robineau-Desvoidy). Later, Emden (1951) saw the same specimen seen by Stein (1907) (designated by inference as lectotype by Pont 1980) and included the species in his key. More recently, Pont & Werner (2003) also included this species in their key for the Xenomyia of Southern Africa. One male from Western Cape, Buffelsbos forest, 33 ° 54.154 ’ S, 23 ° 38.329 ’ E, 400 m, indigenous montane forest (stream), Kirk-Spriggs, A. H. (BMSA (D) 08463 is deposited at BMSA.	en	Couri, Márcia Souto, Sousa, Viviane Rodrigues De, Gomes, Marina, Gil-Azevedo, Leonardo H. (2025): The puzzling genus Xenomyia Malloch (Diptera, Muscidae): taxonomic notes, key to species and redescription of Xenomyia hirtibasis (Bigot). Zootaxa 5570 (2): 260-280, DOI: 10.11646/zootaxa.5570.2.2, URL: https://doi.org/10.11646/zootaxa.5570.2.2
0964E465FF9F20636BD54087FAAA0CC1.taxon	diagnosis	Diagnosis. (modified from Zielke 1970). Length: body 4.7 – 6 mm. Male with eyes bare. Fronto-orbital plates not enlarged; ocellar setae present; fronto-orbital plate narrower than frontal vitta; proboscis short, stout and bulbous, dusted; facial ridges with few setulae near vibrissa; antenna brown, arista long and bare; palpus light greyish dusted; dorsocentrals 1: 3; katepisternals 0: 1; presutural intra-alar seta present; fore tibia without a posterior seta, hind tibia with one median anterodorsal seta and a row of short and strong posterodorsals in the apical third; female with a ventral seta. Metatarsus of hind leg with a comb of short and strong setae, becoming stronger in the apical half. Claws long. Wing brownish; calypter yellowish; halter yellow. Cercal plate very broad (Fig. 33, modified from Fig. 3 of Zielke 1970). Note. Known from male and female South Africa, KwaZulu-Natal, Giant’s Castle. deposited in NHMUK.	en	Couri, Márcia Souto, Sousa, Viviane Rodrigues De, Gomes, Marina, Gil-Azevedo, Leonardo H. (2025): The puzzling genus Xenomyia Malloch (Diptera, Muscidae): taxonomic notes, key to species and redescription of Xenomyia hirtibasis (Bigot). Zootaxa 5570 (2): 260-280, DOI: 10.11646/zootaxa.5570.2.2, URL: https://doi.org/10.11646/zootaxa.5570.2.2
0964E465FF9F20636BD542ABFF330845.taxon	diagnosis	Diagnosis. (modified from Pont & Werner 2003). (Fig. 42 reproduced from Pont & Werner 2003, with permission of the publisher, see Material and Methods); Figs 43 – 45, modified from Couri & Pont 2020). Length: 4.5 – 5.0 mm. Shape of head very distinct with small eye, arched frons, fronto-orbital plates enlarged, with margins touching and covered with dense small setulae (Figs 12 and 13 modified from Figs 1, 2 and Fig. 42 reproduced from Fig. 3 of Pont & Werner 2003). Ocellar setae absent; antennal insertion not produced; arista very short, short pubescent; eye small with short sparse hairs; proboscis elongate, dark brown; palpus long and fine; facial ridges with few setulae near vibrissa. Mesonotum with acrostichal setulae in 2 – 3 rows before suture and 3 – 4 irregular rows behind suture, dorsocentrals 2: 3; presutural intra-alar seta present; anepimeron bare; katepisternals 1 + 2, only the upper posterior seta strong; prosternum bare. Legs with fore femur with a spine-like row of 5 – 7 posteroventral setae (Fig. 18, modified from Fig. 4 of Pont & Werner 2003); fore tibia without submedian setae; hind tibia with 1 anterodorsal and 1 posterodorsal submedian seta; claws not enlarged. Wing completely covered with microtrichia, denser in apical area between R 4 + 5 and Costa, resembling a cloud (Fig. 24, modified from Fig. 5 of Pont & Werner 2003); calypter creamy-white, lower one projecting slightly beyond upper one; halter with the stalk creamy and the knob white. Sternite 5 and terminalia as in Figs 34 – 38 (modified from Figs 6 – 10 of Pont & Werner 2003). Female. Head very different from the male with broad frons; fronto-orbital plate broad, covered with small setulae and with 3 – 4 pairs of frontal setae; 2 pairs of orbital setae; eyes bare; arista longer and narrower. Wing smoky, but without the area with denser microtrichia. Ovipositor as in Fig. 41, modified from Fig. 11 of Pont & Werner 2003. Notes. Described from male and female from South Africa. According to Pont & Werner (2003), the species is known only from the middle Orange River, Northern Cape, and is a predator of black-flies. Holotype deposited in NMSA.	en	Couri, Márcia Souto, Sousa, Viviane Rodrigues De, Gomes, Marina, Gil-Azevedo, Leonardo H. (2025): The puzzling genus Xenomyia Malloch (Diptera, Muscidae): taxonomic notes, key to species and redescription of Xenomyia hirtibasis (Bigot). Zootaxa 5570 (2): 260-280, DOI: 10.11646/zootaxa.5570.2.2, URL: https://doi.org/10.11646/zootaxa.5570.2.2
0964E465FF9F207E6BD5462FFC2F0F95.taxon	diagnosis	Diagnosis. (modified from Emden 1951). Length: 5.6 – 6.5 mm. (Fig. 14, modified from Fig. 55 of Emden 1951). Ocellar absent; fronto-orbital plate much broader than frontal vitta, densely covered by short setulae; postpedicel produced and acuminate; proboscis slender and glossy black; antenna brown; palpus dark yellow, long and slender; prosternum bare; superior frontal seta absent; acrostichals present; dorsocentrals 1: 2; katepisternals 1: 2; presutural intra-alar seta present. Anepimeron bare. Fore tibia without median seta. Hind tibia with an anterodorsal and posterodorsal setae. Claws moderately long, not longer than antenna. Wing smoky. Calypter and halter yellow. Note. Described from male and female from Uganda, Jinja. This species is well known as a predator of black flies in West Africa (Pont & Werner 2003). Holotype deposited at NHMUK.	en	Couri, Márcia Souto, Sousa, Viviane Rodrigues De, Gomes, Marina, Gil-Azevedo, Leonardo H. (2025): The puzzling genus Xenomyia Malloch (Diptera, Muscidae): taxonomic notes, key to species and redescription of Xenomyia hirtibasis (Bigot). Zootaxa 5570 (2): 260-280, DOI: 10.11646/zootaxa.5570.2.2, URL: https://doi.org/10.11646/zootaxa.5570.2.2
0964E465FF82207E6BD5405FFC200D8D.taxon	diagnosis	Diagnosis. (modified from the Emden 1948). Female. (Fig. 15 modified from Fig. 4 of Emden 1948). Body length: 8.3 mm; wing length: 8.2 mm. General ground-color fuscous-brown. Ocellar setae present, fine and short; antennal insertion produced; arista damaged; eye a little oblique with dense and short velvety-like hairs; fronto-orbital plate narrower than frontal vitta and without setae, except for 1 – 2 setulae near lunula; proboscis stout and bulbous, dusted; palpus very large; facial ridges with few setulae near vibrissa. Mesonotum without acrostichal setae, dorsocentrals 1: 4, only the last one strong; presutural intra-alar seta absent; anepimeron bare; katepisternals 0: 1. Legs very long and slender; fore tibia without submedian setae; hind tibia with 1 anterodorsal submedian seta; claws long and strong. Wing brownish along the veins; calypter brown; halter yellow. Notes. Known only from holotype female from Abyssinia, Addis Abada, 8,000 ft, collected in house (NHMUK). Figure of head and thorax in lateral view in Emden (1948). Male unknown.	en	Couri, Márcia Souto, Sousa, Viviane Rodrigues De, Gomes, Marina, Gil-Azevedo, Leonardo H. (2025): The puzzling genus Xenomyia Malloch (Diptera, Muscidae): taxonomic notes, key to species and redescription of Xenomyia hirtibasis (Bigot). Zootaxa 5570 (2): 260-280, DOI: 10.11646/zootaxa.5570.2.2, URL: https://doi.org/10.11646/zootaxa.5570.2.2
0964E465FF82207E6BD54267FA450B3D.taxon	diagnosis	Diagnosis. (modified from Zielke 1970). Length: 4 – 5 mm. Eyes bare. Fronto-orbital plates enlarged, completely suppressing frontal vitta and covered with short dense setulae; ocellar setae absent in male and present in female; proboscis slender, elongate and glossy dark brown; prosternum bare; anepimeron bare; posthumeral seta present. Dorsocentrals 2: 3, katepisternals 1: 2. Fore tibia without a posterior seta; hind tibia with only one median anterodorsal seta. Claws not elongated. Calypter yellow with brownish margins; halter yellow. Notes. Described from male and female from South Africa, Johannesburg, Transvall. Holotype male deposited at NHMUK. According to Zielke (1970) this species resembles X. azurescens but can be easily distinguished by the anteroventral seta in the apical third of the hind femur and the absence of the anteroventral seta on the hind tibia.	en	Couri, Márcia Souto, Sousa, Viviane Rodrigues De, Gomes, Marina, Gil-Azevedo, Leonardo H. (2025): The puzzling genus Xenomyia Malloch (Diptera, Muscidae): taxonomic notes, key to species and redescription of Xenomyia hirtibasis (Bigot). Zootaxa 5570 (2): 260-280, DOI: 10.11646/zootaxa.5570.2.2, URL: https://doi.org/10.11646/zootaxa.5570.2.2
0964E465FF82207E6BD545B7FE550911.taxon	diagnosis	Diagnosis. (modified from Emden 1951). Length: 7.0 mm. Ocellar setae present; fronto-orbital plate narrower than frontal vitta; proboscis short, stout and bulbous, dusted; palpus narrowly dilated apically, flattened, somewhat spoon-shaped; facial ridges with few setulae near vibrissa; several rows of occipital hairs; anepimeron bare; presutural intra-alar seta present in male and absent in female; dorsocentrals 1: 3; katepisternals 0: 1; coxae with slender setae, more numerous on mid coxa; claws very long and strong almost same size as the length of pedicel plus postpedicel; puvilli small; fore tibia with a posterior seta; apex of hind tibia in male with long posteroventral fine setae and very long anteroventral setae; hind tarsi compressed and very short (Fig. 19, modified from Fig. 49 of Emden 1951). Note. Described from male and female from South Africa, KwaZulu-Natal, Ulundi, 5,000 - 6,500 ft .. Holotype deposited at NHMUK.	en	Couri, Márcia Souto, Sousa, Viviane Rodrigues De, Gomes, Marina, Gil-Azevedo, Leonardo H. (2025): The puzzling genus Xenomyia Malloch (Diptera, Muscidae): taxonomic notes, key to species and redescription of Xenomyia hirtibasis (Bigot). Zootaxa 5570 (2): 260-280, DOI: 10.11646/zootaxa.5570.2.2, URL: https://doi.org/10.11646/zootaxa.5570.2.2
0964E465FF82207C6BD547DBFE400867.taxon	diagnosis	Diagnosis. (modified from Emden 1951). Length: body 4.9 mm; wing 4.7 mm. Ocellar setae present; fronto-orbital plate narrower than frontal vitta; proboscis stout and bulbous, dusted; facial ridges with few setulae near vibrissa; claws long and strong; presutural intra-alar seta absent; anepimeron setulose (Fig. 25, modified from Fig. 47 of Emden 1951); katepisternals 0: 1; postpedicel sharply angular at dorsal apex, fore tibia with a posterior seta beyond middle; hind tibia with a fine median posterodorsal seta; hind metatarsus modified, very slender in basal two-thirds and strongly thickened and with some setae on apical third (Fig. 20, modified from Fig. 48 of Emden 1951). Note. Described from male from Kenya, Aberdares, Thompson’s Falls. Holotype deposited at NHMUK. This is the only Xenomyia species with setulae on anepimeron, but in a different position as in Lispe (the former having the setulae in front of the anterior end of the infrasquamal ridge, and not like the latter where the setulae are in the middle of anepimeron between lower anterior end of infrasquamal ridge and the suture with katepisternum. Also, the parafacialia of this species is bare. Emden (1951: 496) made some considerations about the position of this species in Xenomyia.	en	Couri, Márcia Souto, Sousa, Viviane Rodrigues De, Gomes, Marina, Gil-Azevedo, Leonardo H. (2025): The puzzling genus Xenomyia Malloch (Diptera, Muscidae): taxonomic notes, key to species and redescription of Xenomyia hirtibasis (Bigot). Zootaxa 5570 (2): 260-280, DOI: 10.11646/zootaxa.5570.2.2, URL: https://doi.org/10.11646/zootaxa.5570.2.2
0964E465FF80207D6BD54601FEE70EC9.taxon	diagnosis	Diagnosis. (modified from Zielke 1970). Length: body 5 – 6 mm. Fronto-orbital plates not enlarged; eyes densely covered with short hairs; ocellar setae present; fronto-orbital plate narrower than frontal vitta; proboscis short, stout and bulbous, dusted; facial ridges with few setulae near vibrissa; prosternum bare; antenna dark brown; arista nearly bare; palpus grey, slightly dilated apically, flattened, spoon-shaped; dorsocentrals 2: 3, the anterior presutural one very weak and short; anepimeron bare; presutural intra-alar seta present; katepisternals 0: 1. Fore tibia with one posteroventral seta. Hind tibia with a weak posterodorsal seta, one anterodorsal and one anterovental. Wings brownish, halter and calypter yellow. Notes. Described from male and female from South Africa, KwaZulu-Natal, Giant’s Castle, Holotype deposited at NHMUK.	en	Couri, Márcia Souto, Sousa, Viviane Rodrigues De, Gomes, Marina, Gil-Azevedo, Leonardo H. (2025): The puzzling genus Xenomyia Malloch (Diptera, Muscidae): taxonomic notes, key to species and redescription of Xenomyia hirtibasis (Bigot). Zootaxa 5570 (2): 260-280, DOI: 10.11646/zootaxa.5570.2.2, URL: https://doi.org/10.11646/zootaxa.5570.2.2
0964E465FF81207D6BD540A3FB1B0C55.taxon	diagnosis	Diagnosis. (modified from Zielke 1970) Length: 7.5 mm. Fronto-orbital plate narrower than frontal vitta; profile of head at antennal base much longer than at mouth margin, forming an acute angle. Eyes densely covered with short hairs; ocellar setae present; fronto-orbital plate narrower than frontal vitta; proboscis short, stout and bulbous, dusted; palpus brown; antenna brown; arista bare; dorsocentrals 2: 3; katepisternals 1: 1; prosternum bare; presutural intra-alar seta present. Fore tibia with 1 – 2 posterior seta; the last two tarsomeres dorsally dilated; hind tibia with only one short anterodorsal seta at middle; claws not enlarged. Calypter brownish; halter yellow. Notes. Known from holotype male from South Africa, Umicomozana, Natal River. (NMSA).	en	Couri, Márcia Souto, Sousa, Viviane Rodrigues De, Gomes, Marina, Gil-Azevedo, Leonardo H. (2025): The puzzling genus Xenomyia Malloch (Diptera, Muscidae): taxonomic notes, key to species and redescription of Xenomyia hirtibasis (Bigot). Zootaxa 5570 (2): 260-280, DOI: 10.11646/zootaxa.5570.2.2, URL: https://doi.org/10.11646/zootaxa.5570.2.2
