A new stiletto fly genus from South America (Diptera: Therevidae: Agapophytinae) Author Irwin, Michael E. Author Winterton, Shaun L. text Zootaxa 2020 2020-03-17 4751 2 276 290 journal article 10.11646/zootaxa.4751.2.4 e3adbec8-2861-49f8-b7a2-39f1bdcbb493 1175-5326 3713094 31F0F048-6F6E-416B-B687-4160348D6705 Sigalopella armeniaca sp. n. ( Figs 3 –5, 14) urn:lsid:zoobank.org:act: A56238A6-E565-4C16-BC9E-AA174342CA04 FIGURE 3. Sigalopella armeniaca sp. n. , holotype female, lateral view, (body length ca. 7.0 mm). Type material— Holotype female, CHILE : Valparaíso Region : Aconcagua , Rio Blanco [ -32.932 , -70.281 ], 1958, L. Peña ( MEI 121486 , CNC ). Paratypes : CHILE : Valparaíso Region : 1 male , 4 females , Aconcagua , Piscicultura , Rio Blanco [ -32.932 , - 70.281 ], 17.xi–20.xi.1958 , L. Peña ( MEI1121302 , MEI121488 , CSCA ; MEI121485 , MEI121487 , MEI121489 , CNC ) . Common name . Bicoloured sigalopella. Diagnosis . Parafacial with domed callus; scape longer than head, barely thicker than base of flagellum; abdomen black with segments 2–4 yellow laterally; femora yellow; wing uniformly dark infuscate. Description . Body length ca . 8.5 mm . Head : Polished black; frons smooth and slightly rounded with slight transverse furrow immediately below ocellar tubercle (female), sparse dark setae laterally around antennal base, extending ventrally onto parafacial along eye margin; parafacial domed laterally, narrow silver pubescent stripe laterally along eye margin, extending along gena; gena with sparse black setae; occiput black, overlain with silver pubescence laterally on postocular ridge, occipital setae black, sparse dorsolaterally; maxillary palpus black with extensive black setal pile; antennal scape longer than head, barely thicker than pedicel and flagellum, yellow at base only, extensive erect, black setae, shorter in female, much longer in male. Thorax : Scutum and scutellum glossy black with dark setal pile admixed with sparse glaucous pubescence, faint dorsocentral vittae present anteriorly; pleuron black with silver pubescence, denser on lower half; dark setae on katatergite; chaetotaxy: notopleural: 4, supra-alar: 1, post-alar 1, dorsocentral: 1, scutellar: 1; coxae polished black with sparse glaucous pubescence; coxae with black macrosetae, more abundant on forecoxa that other coxae, especially in male; femora yellow, hind femur dark brown dorsoapically; fore- and midtibia yellow, black distally; hind tibia black; tarsi black, some tarsomeres yellow basally; haltere cream-white to yellow; wing dark infuscate, paler posteriorly. Abdomen : glossy black with sparse, scattered, black setae, shorter dorsally, more elongate anteroventrally; segments 2–3 dark yellow laterally. Male and female terminalia : as per genus description. Etymology . From the Latin: armeniacus —apricot coloured, yellow with a perceptible mixing of red; refers to the colour of the distinctive abdominal colour of this species. A feminine adjective. Comments . Sigalopella armeniaca sp. n. can be distinguished from all other species of the genus by the striking yellow-orange areas laterally on abdominal segments 2 and 3. In common with S. rufifemoralis sp. n. and S. nigrifemoralis sp. n., this species possesses inflated bulbous parafacial calli laterally as well as a narrower and more elongate antennal scape. In common with S. rufifemoralis sp. n. and S. ammophila sp. n. , all femora are yellow. This species occurs inland in central Chile .