Entesia notabilis (Macquart)

Winterton, Shaun L. & Irwin, Michael E., 2023, Revision of the South American stiletto fly genera Entesia Oldroyd and Melanothereva Malloch, with the description of a new genus (Therevidae: Agapophytinae), Zootaxa 5269 (1), pp. 1-82 : 32-33

Entesia notabilis (Macquart)

( Figs 19–21 ; 22G, H ; 51 )

Thereva notabilis Macquart, 1841a: 302 — Macquart (1841b: 24; Plate 5); Blanchard (1852: 416 [redescription]); Philippi (1865: 769 [catalogue]); Reed (1888: 294 [catalogue]); Kertész (1909: 157 [catalogue]); Kröber (1911: 491 [redescription, key]; 1913: 45, 59 [key, catalogue]); Stuardo-Ortiz (1946: 86 [catalogue]); Holston (2004: 58 [catalogue]).

Entesia notabilis ( Macquart, 1841a) — Webb et al. (2013: 14 [catalogue, combination change]).

Psilocephala fuzi Kröber, 1928a: 34 —Kröber, (1928a: fig. 3; 1928b: 6, 12 [checklist and key incorrectly spelled as P. fazi ]); Stuardo-Ortiz (1946: 87); Metz et al. (2003: 254 [translation of original description]) syn. n.

Entesia fuzi ( Kröber, 1928a) — Metz et al. (2003: 254 [combination change]); Webb et al. (2013: 13 [catalogue]).

Diagnosis. Robust, yellow-tan species with grey pubescence; wing hyaline, yellowish anteriorly; single row of post ocular macrosetae in male, macrosetae absent on upper occiput; male eyes almost contiguous below ocellar tubercle; lateral lobe of cervical sclerite with macrosetae present; posterior surface of midcoxa and medial furrow of prosternum with setae absent; scutellum with two pairs of macrosetae; hind femur with subapical anteroventral seta present; distiphallus narrow.

Redescription. Body length. 7.0–8.0 mm (male), 8.0–10.0 mm (female). Head. Frontal pubescence light brown dorsally, silver ventrally, frons flat, male with very few short setae above antenna, female with sparse short, dark setae, male frons width at narrowest point with eyes almost contiguous; postocular setae admixed black and yellow, male as a single row; male occiput flat, pubescence grey, macrosetae absent medially on occiput; genal setae pale; antennal scape equal length to flagellum, dark yellow, erect black setae of varying lengths; flagellum orange-yellow. Thorax. Scutum uniform grey-tan pubescent, narrow brown vitta medially (barely evident in male), 2–3 small brown spots laterally, scattered dark setae, denser and longer anteriorly; macrosetae black, chaetotaxy: np, 4, sa, 1; pa, 1; dc, 3–4; sc, 2; scutellum concolourous with scutum; prosternum without setae in medial furrow; lateral lobe of cervical sclerite with 1–3 yellow macrosetae; pleuron with dense silver-grey pubescence, white setae on anepisternum, katepisternum and katatergite, anepisternum with brownish suffusion dorsally; coxae yellow, overlain with silvergrey pubescence, setae white, coxal macrosetae numerous, strong, black; mid- and hind coxae without setae on posterior surfaces; femora yellow, short dark setae admixed with longer pale setae, hind femur with single subapical anteroventral macroseta; tibiae yellow, dark grey-brown apically; tarsi brown, yellow basally; tibial and tarsal macrosetae elongate; wing hyaline, yellow infuscate anteriorly, venation yellow basally along major veins, darker distally, costal margin setae arranged in two rows; haltere stem pale with knob mostly brown. Abdomen. Sternite 1 with tuft of erect setae medially; abdomen dark yellow, dark brown spot medially on each tergite, darker brown in female; male abdomen without silver velutum on tergites; male vestiture mostly elongate pale setae, denser laterally, female uniform short dark setae; abdominal tergite 2 with patch of short modified setae posteromedially; terminalia dark yellow. Male terminalia. Epandrium elongate, narrowed posteriorly; macrosetae fine, dark on epandrium and gonocoxites; outer gonocoxite process narrow; phallus with dorsal apodeme of parameral sheath subtriangular, distiphallus narrow, straight and short; ejaculatory apodeme narrow. Female terminalia. As per genus description.

Comments. Entesia notabilis is distinctive yellowish species with dark spots along the abdomen that is restricted to central Chile. The tuft of erect setae on sternite 1, two pairs of scutellar macrosetae and multiple macrosetae on the lateral lobe of the cervical sclerite distinguish this species. Metz et al. (2003) examined the holotype of Psilocephala fuzi and transferred the species to Entesia (with an English translation of the original description). Webb et al. (2013) subsequently transferred Thereva notabilis to Entesia . Here, we synonymise P. fuzi Kröber, 1928a with T. notabilis Macquart, 1841a . Kröber (1928a) apparently intended the name P. fuzi as a patronym for the collector A. Faz, but misspelt the epithet in the original publication. Kröber (1928b) subsequently used the intended “ P. Fazi ” spelling in a checklist (page 6) and key to Psilocephala species (page 12). The two female specimens collected from Perales by A. Faz were referenced by Kröber (1928a) in the original description (including a range of measurements), and he singled out the female deposited in SDEI as the Type. The additional specimens were subsequently deposited in the USNM and are considered paratypes here.

Type material— Thereva notabilis Macquart, 1841a : Syntype female, CHILE (MEI119895; MNHN) [examined].

Psilocephala fuzi Kröber, 1928a : Holotype male, CHILE: Ñuble Region : Perales, A. Faz, II.1925 [-36.4205, -72.8696] (MEI115972; SDEI) [examined]. Paratypes. 2 females, same data as holotype (MEI152211, 152216; USNM).

Other material examined— CHILE: Coquimbo Region: 7 females, El Naranjo, Tilama [-32.0321, - 71.1544], I.1968, J. Molina (MEI1154193-9; UCCC ]. O’Higgins Region: 1 female, Bosque de la Conservadores [-34.0566, -70.7265], 1100 m, 1–4.III.1962, Peña (MEI15212; CNC) . Santiago Metropolitan Region: 26 males, 22 females, Quebrada de la Plata, Rinconada, Maipú [-33.4984, -70.9042], 510 m, 25.II.1966, M.E. Irwin, Malaise (MEI028417–9, 154070–89, 154000–24; CSCA) ; 1 female, El Bollenar , 2 km N Pichi Alhue [-33.5729, -71.0215], 23II–12.III.1999, G. Baria (MEI121402; CSCA) ; 1 male, 5 km E Cuesta de Ibacache [-33.4501, -71.3329], 26.III.1966, M.E. Irwin, Malaise (MEI152220: CSCA) ; 3 males, El Arrayan [-33.3425, -70.4714], 7.III.1963, L.E. Peña (MEI152234, 1522361, 154182; UCCC) ; male, Peñalolén [-33.4826, -70.5117], 1.III.1953, L.E. Peña (MEI152219; CNC) ; 1 male, Colina [-33.2045, -70.6607], III.1980, L.E. Peña (MEI078913; FMNH) . Valparaiso Region: Valparaiso [-33.0496, -71.6163], 1909, 1929, E.P. Reed (MEI152221, 152208; CASC) ; 2 males, Valparaiso [-33.0496, -71.6163], 1907, P. Herbst (MEI152207, 152209) ; 1 male, La Cruz [-32.8281, -71.2229], 2.III.1966, L.E. Campos, M.E. Irwin, on citrus leaf (MEI152222; CSCA) ; 1 male, Jardin Botanica Quilpué [-33.0473, -71.5001], 14.III.1964, Peña (MEI152223; CNC) .

Figures

FIGURE 19. Entesia notabilis (Macquart): A. Male, oblique view; B. same, lateral view.

FIGURE 20. Entesia notabilis (Macquart): A. Female, oblique view; B. same, lateral view.

FIGURE 21. Entesia notabilis (Macquart): A. Male head, anterior view; B. male, abdomen, dorsal view.

FIGURE 22. Entesia spp., male terminalia: E. hyalina sp. n.: A. epandrium; B. gonocoxites with phallus in situ, ventral view; E. lurida sp. n.: C. gonocoxites with phallus in situ, ventral view; E. maculicornis (Jaennicke): D. gonocoxites with phallus in situ, dorsal view; E. epandrium; F. gonocoxites with phallus in situ, ventral view; E. notabilis (Macquart): G. epandrium; H. gonocoxites with phallus in situ, ventral view (Scale line: 0.25 mm).

FIGURE 51. Distribution map of Entesia penai, E. notabilis, E. tessera and E. pallidiventroides.