Four new species of the genus Saigona Matsumura (Hemiptera, Fulgoromorpha, Dictyopharidae) from China

Abstract Four new species of the genus Saigona Matsumura, 1910, Saigona anisomorpha Zheng, Yang & Chen, sp. n., Saigona daozhenensis Zheng, Yang & Chen, sp. n., Saigona dicondylica Zheng, Yang & Chen, sp. n. and Saigona tenuisa Zheng, Yang & Chen, sp. n., from China, are described and illustrated. A key to the species of Saigona is provided.


Material and methods
The morphological terminology and measurements used in this study follow Liang and Song (2006). The genital segments of the examined specimens were macerated in 10% NaOH and drawn from preparations in glycerin using a light microscope. Figures of the specimens were made using Leica MZ12.5. Spinal formula of hind leg means the numbers of spines of the tibia, the lateral spines spread along the lateral margin, plus the 1 st and 2 nd tarsomeres.
The following abbreviations are used in the text, BL: body length (from apex of cephalic process to tip of fore wings); HL: head length (from apex of cephalic process to base of eyes); HW: head width (including eyes); FWL: forewing length.
The type specimens are deposited in the Institute of Entomology, Guizhou University, China (IEGU).
Etymology. This new species is named for its aedeagus with two phallobasal conjunctival processes unequal in length.
Remarks. This species is similar to S. henanensis Liang & Song, 2006, but can be distinguished from the latter by its phallobasal conjunctival processes not spiraled at apical 1/5, left one obviously longer than right one; phallobase with apical, dorsal small, with apical, ventral, membranous lobe small, not hook-like in lateral view. Coloration. General color brown, marked with fuscous and ochraceous speckles (Figs 48-50). Vertex brown with lateral carinate balck, median carinate ochraceous. Genae brown, eyes brown, ocellus pink, antenna yellowish and the areas surrounding ocellus and antenna beneath eye yellowish. Frons yellowish, the apex of it black and media carina ochraceous. Pronotum brown with median carina yellowish; lateral, ventrally curved areas yellowish. Mesonotum ochraceous, with a narrow, yellow stripe along median longitudinal carina. Thorax ventrally yellowish; abdomen dorsally dark brown, with yellowish brown stripes, ventrally yellowish. Forewings with most veins fuscous, A and Cu yellowish, stigma dark brown. Legs pale yellowish, apex of tibia, digitus, claw pale brown. Pygofer, anal style and anal tube yellowish-brown.

Distribution. China (Guizhou).
Remarks. This species is similar to S. robusta Liang & Song, 2006, but can be distinguished from the latter by its anal tube rounded in dorsal view (oval in robusta); phallobasal conjunctival processes produced posteriorly (produced dorsally and ventrally, respectively in robusta); phallobase with apical, ventral, membranous lobe small, semi-oval in ventral view (large, triangular in robusta). Coloration. General color brown, marked with fuscous and ochraceous (Figs 51-53). Vertex dark scattered numerous yellowish spots, median carina ochraceous, lateral carinae and margin dark. Genae brown, eyes brown, ocellus yellowish, antenna dark and the areas surrounding ocellus and antenna beneath eye brown scattered yellowish spots. Frons pale brown with brown spots. Postclypeus, anteclypeus yellowish-brown and the apex black. Pronotum dark scattered brown spots, median carina brown, lateral carinae dark; lateral, ventrally curved areas brown. Mesonotum ochraceous scattered black brown spots. Thorax ventrally dark brown. Forewings with venation and stigma brown. Legs dark with pale brown spots.
Etymology. This new species is named for its aedeagus having two stout spine-like processes apically.
Etymology. The species name is derived from the Hellenic word "tenuisa", referring to cephalic process slender and long.
Remarks. This species can be easily distinguished from other species of Saigona by its very long, slender cephalic process.