Lumicella, a new genus of the tribe Empoascini (Hemiptera, Cicadellidae, Typhlocybinae) from China

Abstract Lumicella rotundata gen. et sp. n. is described based on specimens from Fujian Province, China. Habitus photos and illustrations of male genitalia of this new species are provided. Differences between the new genus and closely related genera are discussed.


Introduction
The fauna of Empoascini in China is very rich and diverse, this is associated with China's high biodiversity. To date, 31 genera of this tribe have been described in Chinese fauna (Matsumura 1931;Dworakowska 1971Dworakowska , 1973Dworakowska , 1982Dworakowska , 1993Dworakowska , 1995Zhang 1990;Qin 2003;Zhang andQin 2004, 2005;Qin andZhang 2003, 2008;Qin et al. 2010Qin et al. , 2011aQin et al. , 2011bQin et al. , 2013; Qin and Zhang (2008) provided a key to the genera of the tribe from China. However, our knowledge of the Chinese fauna of this tribe is still incomplete with many genera and species remaining to be described. In this paper, a new genus and species is described based on our recent examination of unidentified materials collected from southern China, as well as habitus photos and drawings of male genitalia of the new species.

Material and methods
The specimens examined in this study are deposited in the Entomological Museum, Northwest A&F University, Yangling, Shaanxi, China (NWAFU). The entire male abdomen of the examined specimens were removed and cleared in 10% NaOH and drawn from preparations preserved in glycerin. External morphology was observed under an Olympus SZX-10 microscope. Photographs of the specimens were made using a Nikon SMZ 1500 microscope with a Retiga 2000R camera (CCD). Images were produced using the software Auto-Montage Pro. The male genitalia were drawn using a Olympus PM-10AD, and wings were drawn with a Leica MZ-12.5 microscope. All the pictures were edited and enhanced using Adobe Photoshop CS7.0 (Adobe Systems). The body measurements are from apex of the vertex to the tip of the forewing.
Morphological terminology predominantly follows Zhang (1990) except for the nomenclature of the wing and setae on the subgenital plate, where we follow Dworakowska (1993) and Southern (1982) respectively.
Description. Body small. Head with eyes broader than maximum width of pronotum (Figs 1, 3). Vertex short, rounded anteriorly (Figs 1, 3), profile of transition to face rounded (Fig. 2), coronal suture long (Figs 1, 3). Face narrow and slightly convex in profile, lateral frontal suture present (Figs 2, 4). Forewing narrow, rounded apically, apical cells occupying less than one-third total length, all apical cell with separate bases, 2nd apical cell with margins subparallel but slightly broadened at apex, c and r cells nearly equal in width, narrower than m and cua cells; veins RP, MP' arise from r cell and MP"+CuA' from m cell (Fig. 9). Hindwing with bifurcation point of CuA basad of coalescence of CuA with MP" (Fig. 10).
Etymology. The generic name is an arbitrary combination of letters, and is regarded as feminine.
Discussion Description. Body length: Male 3.7-3.9mm. General colour variable: lighter coloured specimens yellow to ochre-yellow. Vertex with borders at eyes creamy-yellowish, semilunar patch mesocaudad of ocelli creamy. Face and basal antennal segments light yellow. Eyes blackish-brown. Disc of pronotum golden-yellow, irregular arch of hypodermal pattern light-yellow in addition to three large creamy patches along anterior margin. Centre of scutellum sordid cream, scutoscutellar sulcus beige. Darker specimens brown to sordid brown, semilunar patch mesocaudad of ocelli, borders at eyes, genae, patches on pronotum and centrally on scutellum, sordid cream.
Etymology. The name is derived from the Latin word "rotundus" (round), which refers to the rounded apex of the aedeagal shaft.
Distribution. Known only from the type locality in Fujian Province in southeastern China.