Sigalopella armeniaca sp. n.

(Figs 3 –5, 14)

urn:lsid:zoobank.org:act: A56238A6-E565-4C16-BC9E-AA174342CA04

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.