Heterothrips Hood

Heterothrips Hood, 1908 . Type-species H. arisaemae Hood.

Diagnosis. Antennae 9-segmented, segments III–IV with circumpolar sensoria at apex, with one or more rows of sensorial pores; III with two basal constrictions. Head wider than long, without long setae; ocellar setae I present or absent. Pronotum with no long setae (Fig. 14); metanotum covered with microtrichia, usually with concentric sculpture but sometimes almost forming a triangle medially (Fig. 12). Fore wing slender, wider at base, both veins with complete rows of setae (Fig. 20). Abdominal tergites laterally covered with microtrichia, with posteromarginal fringe of independent microtrichia (Fig. 1), or with craspedate lobes bearing microtrichia; II–VIII with median pair of setae well developed, arising close together (Figs 2, 17, 19); sternites sometimes bearing few discal setae. Male usually with oval or transverse pore plates on abdominal sternites (Figs 54, 67); some species with a pair of dorsolateral finger-like projections on tergite IX (Figs 81, 107).