Nenasa ouchii sp. nov.

(Figs 1–22)

Type locality. China, Fujian (= Fukien) Province, Guangze (= Kwangtseh) County.

Type material. HOLOTYPE: ♁, ʻKwangtseh – Fukien / J. Klapperich 0 / 18.8 1937 // Museum / Koenigʼ (ZFMK, dry-mounted on a pin and placed on a card, genital segments detached, stored in glycerine in a glass microvial pinned under the specimen) . PARATYPE: ♀, ʻShaowu – Fukien / (500 m) J. Klapperich / 15.7. 1937 // Museum / Koenigʼ (ZMFK, dry-mounted on a pin and placed on a card).

Description. Coloration. Male. Metope and postclypeus yellowish brown frontally, with light yellow pustules (traces of larval sensory pits) (Fig. 3). Coryphe yellowish light brown (Fig. 1). Postclypeus laterally and anteclypeus dark brown to black. Preocular fields yellowish (Fig. 2). Genae dark brown to black. Scapus dark brown. Pedicel dark brown, with yellow apex. Rostrum dark brown dorsally and yellowish ventrally, with dark brown band apically. Pronotum yellowish light brown, with dark brown to black paradiscal fields. Paranotal lobes largely whitish light yellow, dark brown to black below and behind eyes. Mesonotum yellowish light brown, with dark brown to black lateral parts. Forewings dark brown, each with large light yellow spot basally and light yellow inner margin (Figs 1, 2). Episternae and epimerae of thorax black. Coxae and trochanters dark brown, with yellow areas. Femora and tibiae brown to dark brown, with light yellow crossbands. Tarsi yellowish brown, with dark brown claws. Apices of leg spines black. Abdominal tergites dark brown, with light yellow median line and lateral parts. Abdominal sternites dark brown to black, with yellowish hind margins and large yellowish spots laterally. Lower part of pygofer and styles basally light yellow.

Female (the specimen examined with soil particles on head and body including forewings). Metope dark brown, with yellowish light brown areas and pustules (Fig. 7). Coryphe, pro- and mesonotum, and forewings dark brown (Fig. 5). Preocular fields yellowish light brown (Fig. 6). Scapus dark brown. Pedicel dark brown, with yellow apex. Rostrum brown to dark brown dorsally and yellowish ventrally, with dark brown to black band apically. Episternae and epimerae of thorax black. Coxae and trochanters dark brown, with yellow areas. Femora and tibiae dark brown, with light yellow crossbands. Tarsi yellowish brown, with dark brown claws. Apices of leg spines black. Abdominal tergites generally dark brown to black. Tergite III with light yellow lateral margins and tergites IV–VII each with two light yellow pustules on each lateral side and two closely situated light yellow carinae along midline (Figs 5, 12).Abdominal sternites dark brown, with yellowish light brown hind margins, each with yellowish brown areas medially and yellowish spots laterally. Sternite VII with yellowish hind margin. Anal tube yellowish light brown medio-dorsally and dark brown laterally. Pygofer dark brown, with yellowish light brown areas. Gonoplacs yellowish light brown proximally and dark brown distally.

Structure. Male. Metope wide and flat, with two rows of pustules between lateral margins and sublateral carinae; lateral margins almost straight; upper margin slightly concave (Fig. 10). Metope with distinct median carina extending from above its middle through postclypeus across metopoclypeal suture (Figs 3, 10). Sublateral carinae of metope distinct, extending from its upper margin to lower metopial angles above metopoclypeal suture. Metopoclypeal suture distinct laterally, widely convex. Metope and coryphe, in lateral view, joined at right angle (Fig. 2). Coryphe transverse, with pair of lateral concavities; hind margin nearly straight (Fig. 9). Pedicel globular. Rostrum reaching hind coxae; third segment short, half length of second segment, cylindrical, not narrowing apically (Fig. 11). Pronotum as long as coryphe medially, with distinct median carina and two lateral carinae separating central disc from paradiscal fields (Fig. 9). Paranotal lobes wide (Fig. 2). Mesonotum 1.5 times as long as pronotum, with median and lateral carinae. Forewings reaching only hind margin of third abdominal tergite, venation obscure (Figs 1, 2). Hind wings rudimentary. Legs not flattened or foliated. Hind tibia with single lateral spine in its apical third and with 7 spines apically. First metatarsomere twice as long as second one, with two latero-apical and one intermediate spine. Second metatarsomere with only two latero-apical spines.

Female. As mentioned for the male, except for more relief forewing venation and abdominal tergites IV–VII each with two carinae closely situated along midline (Fig. 12).

Male genitalia (Figs 15–22). Hind margins of pygofer straight in lower two thirds, convex in upper third (Fig. 18). Anal tube, in dorsal view, wide, almost rounded, with weak apical concavity (Fig. 22). Phallobase wide, in lateral view slightly curved (Fig. 15), asymmetrical (Figs 15–17); dorsal lobe wide, with deep notch (Fig. 16); ventral lobe narrowing apically (Fig. 17). Aedeagus with two long ventral hooks, different in shape and length, curved and directed ventrally (Figs 15–17). Connective with a narrow cup and two deep lateral clefts (Figs 15, 19). Style with straight hind margin; caudo-dorsal angle right (Fig. 20); capitulum of style long and narrow, narrowing apically (Fig. 21).

Female genitalia (Figs 13, 14). Sternite VII deeply concave medially, with two rounded projections (Fig. 14). Anal tube, in dorsal view, wide, slightly narrowing apically (Fig. 13).

Measurements. Body length (from apex of coryphe to apex of anal tube in male or to apex of gonoplacs in female): male – 4.7 mm, female – 5.2 mm.

Diagnosis. The new species differs from N. obliqua by coloration and structural details of the male genitalia (see the key below).

Etymology. The species is named in honor of Dr. Yoshio Ôuchi who described and illustrated Caliscelis orientalis Ouchi, 1940 and Fortunia sinensis (Ouchi, 1940) from Zhejiang (= Chekiang) Province of China.