Neolygus hasegawai n. sp.

Figs. 4I, 8A–F, 16A–L

Material examined. Holotype (♂). JAPAN: Honshu, Fukushima Pref., Oze National Park, Tashiro, 36.977, 139.480, Angelica pubescens, 18 Jul 1950, H. Hasegawa (NIAES) (AMNH _ PBI 00378768) . Paratypes: JAPAN: same data as for holotype, except for date 17–18 Jul 1950, 2♂ 3♀ (NIAES) .

Diagnosis. At first sight similar to the uniformly pale green, moderate-sized congeners, this new species is distinct in having the following characters: apex of clypeus darkened; apical protuberances of parameres bulbous; vesica with straight, apically widened spiculum and truncated apex of ventral sclerite; and dorsal sac with unique inner looped strap-like sclerite, strongly protruded and fused with anterior part of posterior wall (Fig. 8F).

Description. Body elongate oval, moderate in size (Figs. 4I); general coloration stramineous brown (most probably greenish when alive, fading in dry-preserved old specimens collected in 1950). Head shining; vertex relatively wide, with distinct basal transverse carina that is slightly narrower than pronotal collar (Fig. 16B); apex of clypeus infuscate. Antenna pale brown; segments III and IV darker. Labium pale reddish brown, reaching or slightly exceeding apex of mesocoxa. Pronotum and pleura uniformly pale brown; scent efferent system relatively narrow (Fig. 16C). Hemelytra immaculate; membrane pale smoky brown, with pale yellow veins. All coxae and legs pale; tibial spines pale reddish brown; pretarsal structure as in Fig. 16F. Ventral side of abdomen uniformly pale.

Male genitalia (Figs. 8A–D, 16A–L): Parameres with bulbous apical protuberances on sensory lobes (Fig. 8A– B); hypophysis of right paramere sharpened apically; vesica with spiculum widened apically and ventral sclerite truncated at apex (Figs. 6E, 16H–I).

Female genitalia (Figs. 8G–I, 16J–L): Sclerotized rings thick-rimmed, elongate-ovoid (Fig. 8G, 14J); posterior wall as in Fig. 14K–L; dorsal sac with looped strap-like sclerite that is covered with membranous lobe, strongly protruded and fused with dorsoanterior part of posterior wall (Fig. 8F, 16K).

Measurements: See Table 1.

Etymology. Named in honor of the late Mr. Hitoshi Hasegawa (1918–2006), one of well-known heteropterists in Japan; he collected all available specimens of this new species and N. yonanus n. sp. as well.

Distribution. Japan (Fukushima Pref.: Oze National Park).

Biology. Label data shows the specimens designated as type-series were collected from Angelica pubescens Maxim. (Umbelliferae), but the exact breeding host is yet to be confirmed.