Neodelphax Marino De Remes Lenicov & Brentassi 2017

Key to males and females of Neodelphax species.

The three species of Neodelphax recognized from our studies can be distinguished by the following key.

1. General coloration predominantly dark brown to black, except carinae, antennae and legs yellowish (Figs 14 a, 15a). Vertex subquadrate, basal compartment relatively short (Figs 14 b, 15b). Submedian frontal carinae joined far below lower level of eyes (Figs 14 c, 15c). Processes of anal segment distinctly expanded at base (Figs 14 d, 15d)........................... 2

- General coloration yellowish brown with lighter intercarinal areas of frons, antennae and legs (Figs 16 a, c). Vertex shorter than wide, basal compartment relatively large (Fig. 16 b). Submedian frontal carinae joined just below lower level of eyes (Fig. 16 c). Processes of anal segment uniformly wide at base (Fig. 16 d)............................... N. acheron (Fennah)

2. Male with pygofer distinctly marked with yellow on dorso-lateral margin. Processes of anal segment slightly dilated subapically and projected in acute apical spine; parameres S-shaped with inner angle obscure; phallotheca short and laterally depressed with caudal process slender, ventrally projected closely below phallotrema (Fig. 14 d). Female with genital scale subtriangular, strongly produced caudally (Fig. 14 e), valvifer VIII expanded basally (Fig. 14 f). Spur with 26–28 acute fine teeth.................................................................................. N. fuscoterminata (Berg)

- Male pygofer uniformly brown dark, Processes of anal segment strongly wide basally, laterocaudad margins produced in welldeveloped claw-like process caudoventrad curved; parameres slender and sinuous, moderately curved apically, inner angle distinct; phallotheca tubular with a spinous flag-like process at 1/3 apical (Fig. 15 d). Females with genital scale wide and bispinose (Fig. 11), valvifer VIII widely produced at base (Fig. 12). Spur with 22–23 acute teeth......... N. sakakibarai sp. n.