Adrothrips madiae Mound & Tree & Wells 2022, sp.n.

Adrothrips madiae sp.n.

(Figs 7, 17, 25)

Female microptera. Body largely yellow, head weakly shaded posteromedially, pronotum with pale brown area medially, mesonotum and metanotum with brown areas, meta-epimera darker; tergites II–VII each with transvers brown band on anterior half; tube dark brown with base yellow; legs mainly yellow, mid and hind femora and tibiae with brown shadings; antennal segments I–III mainly yellow, remaining segments increasingly dark. Major setae all translucent. Head about 1.6 as long as wide, genae parallel (Fig. 17); postocular setae small and capitate but distant from eye margin; vertex weakly reticulate. Maxillary stylets retracted into basal third of head, close together medially, with two flexures forming a figure-of-eight before entering mouth cone. Antennal segment III with no sense cone, IV with 2 stout sense cones, apex of V slightly constricted and symmetric with one short stout sense cone, V–VI each with narrow pedicel (Fig. 7). Pronotum about as long as wide and narrower than prothorax (Fig. 17), with distinct median longitudinal apodeme but little reticulation, all five pairs of major setae small and capitate. Metanotum reticulate, reticles with few internal markings, bearing 10–12 small setae (Fig. 25). Prosternal ferna with anterior margin almost transverse; mesopresternum consisting of two lateral triangles; metathoracic sternopleural sutures long and slender. Fore legs massive, tarsal tooth stout, about as long as tarsal width. Fore wing lobe very small with 2 sub-basal setae. Pelta broadly triangular, reticulate; tergites II–VII each with only posterior pair of wing-retaining setae, these are sometimes only weakly developed; tergite IX setae capitate and about as long as basal width of tube; tube weakly constricted medially and at apex.

Measurements (holotype female in microns). Body length 1800. Head, length 225; width medially 125; po setae 12. Pronotum, length 200; width 220; prothorax width across coxae 350; major setae – am 12, aa 12, ml 15, epim 25, pa 20. Fore wing length 65; sub-basal setae 12. Tergite IX setae S1 50, S2 60. Tube, basal width 55, length 105. Antennal segments III–VIII length 40, 40, 38, 50, 25, 20.

Male microptera. Closely similar to female but smaller.

Specimens studied. Holotype female microptera, South Australia, Kangaroo Island, American River, from Allocasuarina verticillata, 3.iv.2021 (LAM 6482), in ANIC.

Paratypes: Kangaroo Island, 4 females, 1 male taken with holotype; same site and host, 1 female, 31.iii.2021, 1 female, 29.xi.2021; Stokes Bay, 1 female from same host, 30.xi.2021; Destrey’s Bay Road, 1 male from Allocasuarina muelleriana, 1.xii.2021. Australian Capital Territory, Canberra, Weston, Oakey Hill, 1 female from Allocasuarina verticillata, 29.xi.2002.

Comments. This is an unusually pale species with a relatively slender head and pronotum. The stylets are arranged in a similar pattern to those of systenus, but in that species the body surface is much more strongly sculptured and the tube slightly swollen in the basal third (Fig. 37).