Entesia delicata, Winterton & Irwin, 2023

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 : 12

Entesia delicata sp. n.

( Figs 4 ; 49 )

Zoobank: urn:lsid:zoobank.org:pub:FE9E6180-3AC3-4CC3-9F09-F279EBC37692

Diagnosis. Slender, yellowish-tan species; male with a single row of postocular macrosetae; wing hyaline, slightly infuscate along costal margin and along wing veins; posterior surface of mid coxa and medial furrow of prosternum with setae absent; one pair scutellar macrosetae; hind femur with subapical anteroventral seta; sternite 1 without erect setal patch medially; abdominal tergite 2 with short setal patch anteromedially.

Description. Body length. 7.5 mm (male). Slender species. Head. Dark yellowish-tan; frons flat, pubescence entirely dark yellow, male without setae; male frons width at narrowest point narrower than anterior ocellus but eyes not contiguous; pale postocular setae as single row, occiput without additional macrosetae; postocular ridge yellowish brown pubescent, silver-grey medially on occiput; genal setae pale; antenna shorter than head; scape shorter than flagellum, dark yellow with few small pale setae; flagellum orange-yellow, darker apically. Thorax. Dark yellowish-tan; scutum brown, lighter laterally, scattered short dark setae, two suffuse medial vittae anteriorly, macrosetae black; scutellum dark yellow; prosternum without setae in medial furrow; cervical sclerite lacking macrosetae; pleuron tan, overlain with sparse greyish pubescence, white setae dorsally on anepisternum, absent on katepisternum, katatergite setae uniform pale; scutal chaetotaxy: np, 3; sa, 1; pa, 1; dc, 3; sc, 1; coxae yellow, overlain with silver-grey pubescence, setae mostly pale, macrosetae few in number, pale, mid- and hind coxa without setae on posterior surface; femora yellow with short dark setae, hind femur with single subapical anteroventral macroseta; tibiae dark yellow; tarsi dark yellow; wing mostly hyaline, darker anteriorly; venation yellow, darker apically along cell bm, costal margin setae arranged in two rows; haltere pale orange. Abdomen. Dark yellowish-tan; sternite 1 lacking medial tuft of setae; male abdomen without silver velutum on tergites, vestiture mostly elongate pale setae, denser laterally, darker distally; abdominal tergite 2 with patch of short modified setae posteromedially, terminalia dark yellow. Male terminalia. Not dissected; externally epandrium sub quadrangular; numerous black macrosetae on epandrium and gonocoxites; outer gonocoxal process slightly rounded distally.

Etymology. The species epithet is an adjective derived from the Latin, delicatus— dainty; referring to the diminutive habitus of this species.

Comments. Entesia delicata sp. n. is known only from a single male from northern Argentina. This species is distinctive for its slender body, uniform dark yellow-tan colour and sparse setae.

Type material— Holotype male, ARGENTINA: Tucumán Province: San Pedro de Colalao [-26.2414, - 65.5018], 14.X.1968, L.E. Peña (MEI079684; MACN).

Figures

FIGURE 4. Entesia delicata sp. n.: A. Male, oblique view; B. same, lateral view.

FIGURE 49. Distribution map of Entesia dolichochele, E. hyaline, E. maculicornis, E. blackmani and E. delicata.