New stiletto flies from New Caledonia (Therevidae, Agapophytinae) Author Irwin, Michael E. Emeritus, University of Illinois, Urbana-Champaign, Illinois, USA & University of Arizona, Tucson, USA Author Winterton, Shaun L. California State Collection of Arthropods, California Department of Food & Agriculture, Sacramento, California, USA wintertonshaun@gmail.com Author Metz, Mark A. USDA, ARS, Systematic Entomology Laboratory, Beltsville, Maryland, USA https://orcid.org/0000-0002-3535-535X text ZooKeys 2020 984 83 132 http://dx.doi.org/10.3897/zookeys.984.53587 journal article http://dx.doi.org/10.3897/zookeys.984.53587 1313-2970-984-83 D8B945AE620949578BB1D96DDBB5AA44 1448149CA44B51ED9EE57DC3A924C430 Calophytus webbi sp. nov. Figs 5E , 6D , 7E , 8B , 19 , 20 , 21 , 22 , 31B Diagnosis. Flagellum longer than scape; single row of black postocular macrosetae dorsally; body predominantly yellow; wing mostly hyaline, dark apically; scutellum overlain with sparse silver pubescence; abdomen yellow, tergites brown posteriorly; legs yellow, tarsi brownish; male abdomen lacking silver pubescence. Description. Length 5.5-8.1 mm. Head . Glossy black, yellow around base of antenna. Frons glossy, smooth, slightly raised around base of antennae; eyes separated by 3 x width of median ocellus in both sexes. Occiput black with silver pubescence laterally and ventrally, admixed with pale setae laterally and onto gena; single row of black to orange postocular macrosetae in both sexes. Parafacial dark, yellowish laterally, overlain with silver pubescence along eye margin; posterior oral margin yellow, not pubescent. Scape 3/4 of head length, dark yellow, brown suffusion apically. Basal flagellomere 2.5 x length of scape, cylindrical, abruptly tapering to a blunt point apically, densely covered with brown pubescence. Second flagellomere subapical, subequal in length to third flagellomere; style small, spiculate. Palpus cylindrical, apex slightly capitate. Mouthparts yellow with pale setal pile, yellow on labium, black on labellum. Thorax . Yellow; scutum with dark dorsocentral stripes, narrow anteriorly, thickening posteriorly and merging medially into a single stripe before posterior margin, brownish suffusion sometimes posteriorly on scutum; scutellum brown dorsally; posterodorsal katepisternum, metanepisternum, metepimeron, and metakatepisternum overlain with silver pubescence; sparse silver pubescent on posterior scutum and scutellum; macrosetae black (np: 1, sa: 1, pa: 1, dc: 0, sc: 1); scutum, katatergite, lateral postpronotum, postpronotal lobe, cervical sclerite, proepisternum, and lateral prosternum with short, yellow setae. Legs . Yellow except with small black spot ventrally at union of femora and trochanters; foretarsus light brown; sparsely pubescent, dorsal part of hind coxa silver pubescent; legs with short, yellowish, setae, except foretarsus with brown setae. Forecoxa with some longer, gold, filiform setae anteriorly. Forecoxa with two macrosetae; mid- and hind coxae with three anteroventral macrosetae. Wing . Membrane mostly hyaline; costal, subcostal, pterostigma and adjacent r cells, and entire wing apex light brown infuscation; membrane with extensive areas bare of microtrichia. Venation brown with dark microtrichia along veins, m3 widely open at wing margin. Haltere stalk yellow, knob light brown. Abdomen . Yellow, posterior and lateral margins of tergites II-VII brown, terminal segments darker; glossy, not pubescent and male lacking silver pubescence; sparse fine pale setae; medial setae darker, especially on terminal segments. Genitalia . Male: tergite VIII anterior margin slightly emarginate; laterally with brown setae. Cercus relatively narrow, rounded posteriorly. Sternite VIII quadrate, wider posteriorly; posterior 1/6 with brown setae. Epandrium yellow basolaterally and at extreme posterolateral margin, otherwise brown; brown setae sparsely distributed; subepandrial sclerite narrow, 1/3 width of epandrium, partially sclerotised, lateral margins more strongly so. Gonocoxites yellow-brown, elongate dark setae sparsely distributed, except lacking setae ventromedially; outer gonocoxal process sub-triangular; aedeagus with ejaculatory apodeme sub-cylindrical; inner gonocoxal process narrow; dorsal apodeme of parameral sheath 'T' -shaped, ventral apodeme forked; lateral ejaculatory apodeme band-like with small outer process. Female: acanthophorite and acanthophorite spines yellow-brown. Tergite VIII wider than long, with a narrow anteromedial projection, posterior margin slightly emarginated. Sternite VIII gold; long, brown, setae sparsely distributed, bare laterally and more dense on posterior lobes. Median lobe of tergite IX reduced, very short. Sternite X quadrangular with short, brown setae. Spermathecal duct 5 x furcal length. Spermathecal sac duct 3.5 x furcal length; spermathecal sac ovoid, longer than wide; 0.5 x length of spermathecal sac duct. Etymology. This species is named after the late Dr Donald W. Webb, who was a member of several of the expeditions to New Caledonia and was one of the collectors of this species. Comments. Calophytus webbi sp. nov. is a relatively diminutive, bright yellow species with distinctive antennae that readily distinguishes it from all other Calophytus species (Figs 5E , 19 , 20 ). This species appears endemic to the tropical dry forest of the Pindai Peninsula (Fig. 31B ) on the west coast of the Northern Province (Fig. 22 ); it is only known from a series of specimens collected from two localities on this peninsula. Genbank sequences for this species (see Winterton et al. 2016 : table S1): KT290080 (16S rDNA), KM885002 (28S rDNA), KM879120 (EF1a); KT306930 (CAD) (not KT306928 as reported in Winterton et al. 2016 ). Specimens examined. Holotype male, New Caledonia: Province Nord: 45 m, Presqu'ile de Pindai , 2.5 km WSW Nepoui , Malaise, " 21.383°S , 164.974°E " [GPS coordinates apparently erroneous; approximated instead as -21.33, 164.96], 26.XI-4.XII.2000, M.E. Irwin, E.I. Schlinger, D.W. Webb (MEI123356, MNHN). Paratypes . New Caledonia: Province Nord: 1 female, Presqu'ile de Pindai , 2.5 km WSW Nepoui , Malaise, " 21.383°S , 164.974°E " [GPS coordinates apparently erroneous; approximated instead as -21.33, 164.96], 10-17.XI.2000, M.E. Irwin, E.I. Schlinger, D.W. Webb (MEI108224, CSCA); 8 males, [ Presqu'ile de Pindai ], 3 km SW Nepoui , Pindai Forest, Malaise trap in costal forest [-21.35, 164.964], 13-23.XI.1992, D.W. Webb, E.I. & M. Schlinger (MEI030180-7, CSCA); 3 males, [ Presqu'ile de Pindai ] 3 km SW Nepoui , Pindai Forest, Malaise trap in coastal forest [-21.35, 164.964], 7-13.XI.1992, D.W. Webb, E.I. Schlinger, M. Schlinger (MEI030178-9, 030188, CSCA).