Delia platura

Delia platura (Meigen, 1826)

(Figs. 4–6; 14, 15)

Diagnosis: General coloration dark brown with silver pruinosity, thorax with dorsal, light brown stripes; palpus dark brown; prealar seta short, never as long as notopleural setae; dorsocentral setae 2+3; katepisternal setae 1+3; legs dark brown; lower and upper calypters of the same size; vein C bare on ventral surface (Fig. 6); mid tibia with one submedian anterodorsal, two posterodorsal and two posteroventral. Male: hind femur with three posterodorsal setae; hind tibia with more than 18 posteroventral short erect setae. Body length: 5.2–6.0 mm. Wing length: 5.2–5.5 mm.

Material examined: CHILE: Juan Fernández, Robinson Crusoe Island, 1 male and 1 female, Bahia Cumberland, 1–11.i.1993, Marshall & Gonzalez leg.

References: Kim & Eckenrode (1984); Savage et al. (2016).

Distribution: cosmopolitan species found in all biogeographic regions, except Antarctica (Griffiths 1997).

Biology: The species is polyphagous, and is considered an important agricultural pest of innumerable plant species of commercial interest (Savage et al. 2016).

Comments: Hennig (1955) identified 28 specimens of Delia platura sanctijacobi (Bigot, 1885) in Robinson Crusoe Island, two in Santa Clara Island and one in Alejandro Selkirk Island (Table 1). Delia sanctijacobi (Bigot, 1885) is now considered a valid species (Pape & Thompson 2013), also with economic importance in Argentina (Hamity & Roman 1987).