Bambusiphaga Huang and Ding 1979: 170; Asche, 1983: 211; Ding & Tian, 1983 (in Kuoh et al. 1983): 49; Yang & Yang, 1986: 37; Wang & Ding, 1996: 22; Ding et al., 1999: 441; Ding, 2006: 126; Chen & Liang, 2007: 504.

Type Species: Bambusiphaga nigripuncata Huang and Ding 1979, by original designation.

Description: Slender and elongate delphacid species, body length 2.8–5.2 mm (from apex of vertex to end of forewing). General color milky-yellow to yellowish-brown, often with brown or black markings.

Head, including eyes, narrower than pronotum. Vertex quadrate or rectangular, slightly longer or shorter medially than width at base, slightly narrower at apex than at base, lateral margins more or less diverging anteriorly, apical part slightly projecting in front of eyes, apical margin evenly rounded into frons, submedian carinae originating from near apical 1/3 of lateral carinae, uniting at apex of vertex, lateral carinae curved inward, Y-shaped carina distinct and fine. Frons elongate, rectangular, longer at middle line than wide (2.0–2.7:1), median carina distinct and simple, lateral carinae parallel or subparallel. Postclypeus with incomplete median carina, lateral carinae absent. Rostrum reaching mesotrochanters, apical segment slightly longer than wide. Antennae cylindrical, basal segment slightly longer or equal to width, 2nd segment longer than 1st (more than 2.7:1), reaching or not reaching frontoclypeal suture. Pronotum about as long as vertex, lateral carinae straight, reaching or almost reaching hind margin. Mesonotum longer at middle line than vertex and pronotum together (about 1.3–2.0:1), median carina extending to tip of scutellum. Spinal formula of hind leg 5-6-4. Post-tibial spur without teeth along posterior margin, but with an apical tooth. Forewing much longer than abdomen, hyaline, cross vein deposited medially, apical margin acutely rounded.

Anal style small. Anal segment of male ring-like, ventral margin with or without a process. Pygofer with or without medioventral processes. Aedeagus with or without phallobase; phallus complex, tubular. Genital styles simple, with a process, or forked apically. Seventh abdominal sternite of female present or absent.

Host Plant: Bamboo (Bambusoideae). Specimens were collected on leaves of bamboo in several genera, Bambusa, Dendrocalamus, Sinocalamus, Neosinocalamus, and Phyllostachys (Huang et al. 1979; Ding & Hu 1982; Ding et al. 1986; Yang & Yang 1986; Chen and Li 2000; Chen et al. 2000; Chen & Liang 2007).

Distribution: Oriental region, with abundant species in China.

Description. Length of body 1.5–1.8mm (male), 1.9–2.1mm (female); including forewing 2.9– 3.1mm (male), 3.4–3.5mm (female).

Coloration. General coloration light yellow or reddish-orange. Forewings color lighter than body, veins same to body, with a small brown mark along cross vein near apex of clavus. Ocelli, eyes dark brown. Abdomen color darker than other area, pygofer yellowish white, anal style dark brown.

Head and Thorax. Structural features as in generic descriptions. Vertex quadrate, length than wider at base about 1.1:1, broader at apex than at base (1:1.3), apical margin arch, carinae distinct, submedian carinae uniting at apex. Frons oblong, longer in middle line than wide at widest part about 2.4:1, slightly narrower at apex than at base, median carina simple. Clypeus developed, postclypeus wider at base than frons at apex obviously, median carina feeble. Antennae with first segment long equal to wide, second segment 2.7 times as long as first, 2 segments together reaching to frontoclyeal suture. Pronotum as long as vertex, lateral carinae attaining hind margin. Mesonotum about 1.3 times the length of vertex and pronotum together, median carina attaining the end of scutellum.

Male Genitalia. Anal segment of male ring-like, no process. Pygofer in profile much longer ventrally than dorsally, in posterior view opening longer than wide, no process at ventral margin. Aedeagus slender, very long, tubular, several spines at dorsal and ventral margin of apical half, blunt end with some small spines at apex. Genital styles long, S-shaped, apical part turning outward, tapering to apex, near apex and near base respectively with 1 lobe-like process and 1 spinous process.

Specimens Examined. Holotype male, CHINA: Hainan, Changjiang, Bawangling National Natural Reserve (19°05′N, 109°07′E), 600–880m, 24∼28-IV-2009 (X.-H. Hou). Paratypes 4 males, 6 females, same data as for holotype; 11 males, 6 females, Hainan, Wuzhishan, Wuzhishan National Natural Reserve (18°54′N, 109°40′E), 668–800m, 13∼15-IV-2009 (X.-H. Hou); 1male, 1 female, Hainan, Lingshui, Diaoluoshan National Natural Reserve (18°43′N, 109°52′E), 300–850m, 9é12-IV-2009 (X.-H. Hou).

Host Plant. Bamboo.

Etymology. This new species is named after the type locality, Hainan Province, China.

Distribution. Southern China (Hainan: Changjiang, Wuzhishan and Lingshui).

Remarks. Based on the morphological characters and male genitalia, this species should belong to the citricolorata group. This species resembles B. maolanensis, but differs in the following: genital styles near apex with 1 lobe-like process (with 1 finger-like process in the latter); aedeagus straight, with several teeth at dorsal and ventral margin of apical half (in the latter, aedeagus arched in middle, with 4 teeth surrounding gonopore). It is distinguished from B. citricolorata by aedeagus slender, with several teeth at apical half, and some small spines at apex (in B. citricolorata, aedeagus stout, with a node and several short gear-like processes at apex); genital styles tapering to apex, with 1lobe-like process near apex (narrowing to apex, with small teeth at apex in B. citricolorata).

Description. Length of body 1.5–1.6 mm (male), 1.9–2.0 mm (female); including forewing 2.8–2.9 mm (male), 3.2–3.5 mm (female).

Coloration. Generally color yellowish white with dark brown markings. Basal half of vertex, margins and area between lateral carina of pronotum (except oblong area dark brown markings), area of inner omia and escutcheon dirty yellowish white. Apex half of vertex light yellowish brown. Areas of outer lateral carinae of pronotum, mesonotum and outer area of omia dark brown to blackish brown. Base and apical 1/3 of fron and area of inner half of genae yellowish brown, fron medial mostly, area of outer half of genae and clypeus dark brown. First segment of antennae brown, 2nd yellowish brown. Ocelli and eye reddish brown to brown. Basal 1/2 of forewing black. Thorax yellowish brown to dark brown. Femora of fore legs and median legs dark brown, tibiae and digitus of fore legs and median legs and femora of hind legs yellowish brown, tibiae and tarsi of hind legs yellowish white. Abdomen dark brown, except yellowish brown posterior margin of each segment. Pygofer and anal segment dark brown.

Head and Thorax. Structural features as in generic descriptions. Vertex quadrate, length than wider at base about 1.1:1, narrower at apex than at base (1:1.6), apical margin arch, carinae distinct, submedian carinae uniting at apex. Frons oblong, longer in middle line than wide at widest part about 2.5:1, broader at apex than at base, median carina simple. Clypeus developed, post-clypeus as wide at base as frons at apex, median carina distinct. Antennae with first segment long equal to wide, second segment 2.7 times as long as first, both segments together not reaching to frontoclyeal suture. Pronotum as long as vertex, lateral carinae attaining hind margin. Mesonotum about 1.3 times the length of vertex and pronotum together, median carina attaining the end of scutellum.

Male Genitalia. Anal segment of male ring-like, right lateroapical angle strongly produced into a long and slender process, surpassing ventral margin of pygofer, slightly arched in lateral view. Dorsal margin of pygofer obviously shorter in profile than ventral margin. Opening of pygofer longer than wide in posterior view, with 3 small lobe-shape processes on ventral margin medially. Aedeagus slender, with simple phallobase. Phallobase small, in profile broad at base, thin and curved at apex. Phallus slender, long, tubular, curved medially, blunt end. Genital styles moderate long, broad at base, apical part turning inward, tapering apically.

Specimens Examined. Holotype male, CHINA: Hainan, Ledong, Jianfengling National Natural Reserve (18°43′N, 108°53′E), 800–1400m, 17∼20-IV-2009 (X.-H. Hou). Paratype 4 males, 4 females, same data as for holotype.

Host plant. Bamboo.

Etymology. This new species is named after the distinctive characters by basal half of forewing black, which can be distinguished from the other species.

Distribution. Southern China (Hainan: Ledong).

Remarks. Based on the morphological characters and male genitalia, this species should belong to the fasica group. This species resembles B. fascia, but differs in the following: forewing of male and female with basal half black (in the latter, forewing of female only with a dark brown transverse stripe medially); median area of frons dark brown (frons yellowish white in the latter); pygofer with 3 small lobe-shaped medioventral processes (absent in the latter); anal segment with a right lateroapical angle process (with a left lateroapical angle process in the latter); aedeagus with simple phallobase (absent in the latter).