Allanagrus Noyes and Valentine, 1989

Allanagrus Noyes & Valentine 1989: 22 (original description); Lin et al. 2007: 21 (diagnosis).

Diagnosis. Female funicle 6-segmented, clava 3-segmented but sometimes with an incomplete suture (Fig. 10 b) so clava apparently partly 2-segmented; face with a distinct subantennal groove extending from torulus to mouth margin; mandible moderately short, uni- or tridentate; pronotum divided; fore wing 4.5–7.0× as long as wide, with sparse to densely setose disc, wing apex smoothly rounded (Noyes & Valentine 1989, fig. 23a) to pointed (Fig. 4), posterior margin behind venation with indistinct lobe; male flagellum 11-segmented with fl11 fairly narrowly attached to fl10, similar to other flagellar segments; genitalia symmetrical, with relatively wide base.

Allanagrus is similar to several other genera with a 3-segmented clava in females, notably Anneckia Subba Rao (1970), known only from Papua New Guinea, Parastethynium Lin & Huber, known from Australia (Lin et al. 2007), Indonesia (Ogloblin 1946), and India (Rameshkumar et al. 2015), and Stethynium (cosmopolitan), as discussed by Huber & Triapitsyn (2017). Stethynium females have a more compact clava with strongly oblique sutures separating the segments and males have an asymmetrical and complex genitalic structure. Parastethynium species have eyes with numerous setae among the facets, the fore wing is wider and apically truncate, and the hind wing is much wider and apically rounded (Huber et al. 2011). The only described Anneckia species is distinguished by the fore wing in its apical half having a distinct oval hyaline area contrasting with a darker area around it and a rather asymmetrical apex, but otherwise Anneckia and Allanagrus are difficult to distinguish from each other. Some species of Allanagrus also have an oval hyaline area in the fore wing but the fore wing apex is symmetrical.

Distribution. Australia (Girault 1912, 1915, 1938), New Zealand (Noyes & Valentine 1989), India (Manickavasagam & Palanivel 2014) and Gabon (Huber & Triapitsyn 2017).

Hosts. Unknown. Specimens of Allanagrus species have been collected from a variety of habitats, as follows: coffee plantation, ginger and pineapple plantation (the two new species described below), second growth bush and garden ( A. magniclava; garden only for A. aurum), on Eucalyptus foliage ( A. mayeri), forest ( A. gladius) (Noyes & Valentine 1989; Girault 1912, 1915) and forest [equatorial] ( A. orientalis) (Huber & Triapitsyn 2017).