Neurisothrips karl sp. n.

(Figs 5, 20, 22, 27, 33, 36, 41)

Female. Body, antennae and legs uniformly dark brown, tarsi sharply yellow; fore wings deeply shaded with subcircular pale “window” at veinal fork; major setae dark brown. With the character states of the genus: antennal segments III and IV with constricted apical neck (Fig. 5); head with ocellar setae III and po IV not particularly long, po setae pair I absent; mouth cone extending to fore coxae (Fig. 36); pronotum with one pair of anteromarginal setae and one pair of anteroangular setae (Fig. 20); discal area weakly sculptured, with 4 to 6 setae; posterior margin with 2 pairs, median pair longest, posteroangular setae long. Metanotal sculpture weak medially. Tergite I with transverse reticulate sculpture; III–VIII with no sculpture mesad of setal pair S1, reticulate sculpture lines weak on lateral areas (Fig. 41); IV and V each with 5–7 discal setae laterally; X with longitudinal split complete (Fig. 22).

Measurements (holotype female in microns). Body length 1600. Head, length 100; width across eyes 165; ocellar setae III 40; po setae IV 45. Pronotum, length 135; width 200; pm S1 setae 30; pa setae 70. Metanotum median setae length 60. Fore wing length 850. Antennal segments III–VII length 50, 48, 30, 40, 25.

Male. Similar in colour and structure to female, or a little paler; sternites III–VII each with small transverse pore plate (Fig. 27).

Measurements (paratype male in microns). Body length 1150. Head, length 90; ocellar setae III 35; po setae IV 40. Pronotal pa setae 55.

Specimens examined. Holotype female, Oahu, Puu Hapapa (21° 28’N, - 158° 06’W), from Pisonia umbellifera fls, 21.viii.2016 (Karl Magnacca), in BPBM.

Paratypes: 29 females, 16 males taken with holotype; same locality, plant species and collector, 5 females, 29.vi.2016.

Comments. Although, as indicated above, this species is similar in structure to the yellow-bodied species fran, most specimens identified here as karl lack postocular setae pair I, also they have only two pairs of pronotal postero- marginal setae. However, a very few individuals have a full complement of one or both of these groups of setae, or the setal pairs are asymmetric in number. This emphasizes yet again our limited knowledge of the variation within and among Neurisothrips species in structure and host associations. The plant species from which this thrips was collected is not endemic to the Hawaiian Islands but is widespread in Southeast Asia.