Ins minas Evenhuis 2020, new combination
Creators: name: Evenhuis, Neal L.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Bombyliidae
Ins
Ins minas

description: Ins minas (Macquart, 1848), new combination
(Figs. 16, 27)
Anthrax minas Macquart, 1848: 193.
Anthrax divisa Walker, 1852: 190, new synonymy.
Villa (Hemipenthes) divisa (Walker). Painter & Painter 1974: 202.
Villa (Hemipenthes) minas (Macquart). Painter & Painter 1974: 246.
Villa divisa (Walker). Hull 1973: 372.
Hemipenthes minas (Macquart). Hull 1973: 386.
Hemipenthes divisa (Walker). Evenhuis 1983b: 470.
Types. Four syntype ♀♀ of Anthrax minas Macquart from “ Brazil ” [no further data] (BMNH). Types examined. Lectotype ♀ designated by Painter & Painter (1974: 246).
Holotype ♂ of Anthrax divisa Walker from “South America” [no further data] (BMNH). Type examined in 1990 and again during this study via photography made available by Erica McAlister.
Diagnosis. Ins minas is most similar in appearance to I. celeris (Wiedemann) but can be separated from it by the conspicuous brown areas dorsolaterally on the scutellum (the scutellum all black in I. celeris) and the narrowed apical portion of the parameral sheath (more broad in I. celeris).
Description. Measurements. Body: 11.8–12.0 mm. Wing: 12.0– 12.5 mm. Male. Head. Black; occipital fringe. Eyes separated at vertex by slightly more than width of ocellar triangle. Frons slightly tumid, black pilose to just above antennae and along inner eye margins, sparse yellow scales immediately above antennae. Face moderately produced in lateral view, subconical, rounded apically, with black hairs medially, admixed with yellowish scales. Antenna black, scape subcylindrical, flared at mesoapical margin, twice as long as pedicel, with black hairs, longest mesally; pedicel subspherical, with sparse black hairs laterally; flagellomere longer than scape and pedicel combined; onion shaped, tapering to thin styliform apical three-fourths, style minute, terminal. Proboscis short, brown, not projecting beyond oral margin. Palpi brown, with sparse, long black hairs.
Thorax. Mesonotum matte black, with anterior and anterolateral margins dense thick admixed black and yellow pilose; disc uniformly covered with sparse fine black and brown hairs; admixture of fine black hairs and fine brassy tomentum in prescutellar area. Scutellum brownish, with sparse fine black hairs along posterior margin; golden tomentum posteroventrally. Pleura brown, gray pollinose; anepisternum dense long yellow pilose, with admixture of dense dark brown hairs medially; katepisternum and anepimeron with short fine golden yellow hairs; meron with patch of golden scales immediately anterior to posterior spiracle; katatergite with dense long yellowish white hairs; metakatepisternum with small patch of yellow hairs adjacent to hind coxa. Post alar callus with patch of short black hairs and black tomentum. Halter stem and knob yellowish white.
Legs. Brown; coxae with yellow hairs; femora with golden scales and adpressed brown scales apicodorsally; fore tibia without bristles, with minute thin hairs.
Wing (Fig. 16) Infuscated dark brown to black basally, hyaline apically, with infuscation dimidiately demarcated; cells c, sc, br, bm, and anal (except at extreme tip) and axillary lobes entirely infuscated; cell r1 hyaline apically; cell dm infuscated on basal three-fourths; cell r2+3 infuscated on basal one-third; cells r4 and r5 hyaline, cells m2 and m3 infuscated at extreme base; remainder of wing hyaline without spots; anal cell open in wing margin by width narrower than r-m crossvein. Basal 1/3 of anal cell fringed with yellow scales; alula fringed with brown scales basally, yellow scales apically; squama with dense long shiny chocolate brown scales.
Abdomen. Chocolate brown, tergites black tomentose dorsally, dense rufous yellow pilose laterally on tergite I; tergite II with yellow hairs anterolaterally, black hairs posterolaterally; tergites III–IV with thick black hairs laterally; tergites V–VII with dense white scales laterally. Venter chocolate brown, adpressed long white pilose and tomentose on each segment, brown tomentose anteriorly on each segment.
Male genitalia (Fig. 27). Phallic complex with parameral sheath bare, broad basally and narrowed to rounded apex in dorsal view, in lateral view with relatively large rounded ventral medial blade-like process; distiphallus in lateral view with small ventral subapical notch.
Female. As in male except as follows: Eyes separated at vertex by ca. 2 x width of ocellar tubercle; frons more tumid than male, sparse black tomentum medially above antenna, white scales laterally; mesonotum with less black hairs and tomentum than in male; pleura without dark hairs, all yellow hairs and tomentum in male replaced by white hairs and scales or tomentum; sternites with anterior segments with black tomentum instead of brown. Genitalia not dissected.
Other material examined. ARGENTINA: 2♂ [no further data], R. d’Alessandro Coll. (USNM). PERU: 1♀, Callanga [no further data] (USNM).
Remarks. The holotype of Anthrax divisa Walker, 1852 was examined during this study via photography made available by Erica McAlister at the BMNH. It matches the features of I. minas (Macquart) and is here treated as a junior synonym of it. Painter & Painter (1974) remarked that the head was glued onto the type specimen and did not match that of a celer group species. The head that is glued on is bright yellow contrasting with the remainder of the body and is actually the head of a species of Poecilanthrax as it is predominantly bare, a primary distinguishing character of that genus. Walker (1852) did not remark on the color of the head and probably would have if it was different than his description: “Deep black, thickly clothed with short black hairs, head clothed with short black hairs, in front with light tawny hairs, and behind with silvery hairs: mouth pitchy ...”, so it was probably glued on after the original description. It is clear that the head does not belong to the type specimen; and since the other characters of thorax, wing, legs and abdomen fit with Ins minas (Macquart), Anthrax divisa Walker is here treated as conspecific with it.
Painter & Painter’s (1974) description is of females, which have slightly different vestiture coloration (paler) than males. The single female specimen at hand from Peru fits Painter & Painter’s description and is an extension of the distribution of this species, previously known from Argentina and Brazil. It may be more widespread when more collected material is examined or when more material is collected.
Distribution. Argentina, Brazil (Minas Gerais), Peru (new record).
description: Published as part of Evenhuis, Neal L., 2020, A new genus for Painter & Painter's Villa " celer " - group in the New World (Diptera: Bombyliidae), pp. 296-314 in Zootaxa 4748 (2) on pages 306-307, DOI: 10.11646/zootaxa.4748.2.4, http://zenodo.org/record/3698809