Horvathiella arisana, (Matsumura, 1914)

Luo, Qiang, Yang, Lin & Chen, Xiang-Sheng, 2018, Review of the bamboo-feeding genus Agrica Strand (Hemiptera: Cicadellidae: Deltocephalinae), with description of two new species from China, Zootaxa 4418 (1), pp. 75-84 : 76-79

Agrica arisana (Matsumura, 1914)

( Figs 1–25 )

Horvathiella arisana Matsumura, 1914: 234 .

Agrica arisana (Matsumura, 1914) , Strand, 1942: 393.

Male. Measurement. Length (including tegmen): ♂ 3.90–4.35 mm (N=62).

Colouration. Body ( Figs 1–2 ) yellow brown, eyes sandy beige to dark brown. Middle of crown ( Fig. 6 ) brownish black, costal region yellowish white and posterior margins area pale yellow. Face ( Fig. 7 ) black, with yellowish brown transverse stripe. Frontoclypeus ( Fig. 7 ) brownish black. Pronotum ( Figs 1, 6 ) dark yellow to dark brown, with two transverse arcuate pale yellow bands. Scutellum ( Figs 1, 6 ) yellow, with or without one black median spot on anterior margin. Veins ( Figs 1–2 ) yellow brown. Legs ( Fig. 2 ) marked with brown.

Head and thorax. Crown ( Figs 1, 6 ) slightly shorter than pronotum (0.92:1), sub-conically anteriorly protruded. Crown with anterior and submarginal carinae between apex and ocelli and shorter than breadth between eyes (0.8:1). Coronal suture ( Figs 1, 6 ) shorter than half of length in median line of crown. Pronotum ( Fig. 6 ) about 2 times wider than long, and as wide as head. Forewing ( Figs 1–2 ) about 2 times longer at middle than widest part.

Male genitalia. Male pygofer ( Figs 18, 22 ) broad basally and narrowed posteriorly its ventroposterior angle lobately produced with dorsal pair of unequal spinous processes. Ventral margin with many short inner setae before the base of spinous processes. Connective ( Fig. 19 ) arms and stem subequal, articulated with base of aedeagus. Aedeagus ( Fig. 23 ) symmetrical, J-shaped in lateral view, shaft sinuate subapically, dorsal apodeme well developed, gonopore apical.

Female. Measurement. Length (including tegmen): ♀ 3.90–4.25 mm (N=113).

Colouration. Body ( Figs 3–4 ) nearly uniform pale yellowish green. Crown ( Figs 3, 11 ) yellowish green, pronotum ( Figs 3, 11 ) pale yellow to yellowish green, scutellum ( Figs 3, 11 ) pale yellow. Eyes pale brown. Frontoclypeus ( Fig. 10 ) pale yellowish green to dark, anteclypeus ( Fig. 10 ) and lorum dark. Forewing pale yellowish green with apical cells area a little transparent. Veins ( Figs 3–4 ) yellowish green, with dark markings restricted to subapical area of corium.

Head and thorax. Crown ( Figs 3, 11 ) sub-conically anteriorly produced, median length slightly shorter or subequal to breadth between eyes (0.9:1); coronal suture ( Fig. 3, 11 ) visible at basal one third to one-half. Frontoclypeus ( Fig. 10 ) strongly convex ventrally in profile. Pronotum ( Figs 3, 11 ) as wide as head including eyes, slightly shorter than median length of crown (0.86:1).

Female genitalia. Sternite VII ( Fig. 16 ) with anterior margin nearly straight; posterior margin with two obvious concave cracks and the middle part V-shaped ( Fig. 16 ). Pygofer ( Fig. 9 ) with numerous macrosetae. Ovipositor ( Fig. 9 ) protruding slightly beyond pygofer apex. First valvula ( Fig. 24 ) weakly curved, tapering apically. Second valvula ( Fig. 25 ) broad, widest near mid-length, thereafter gradually tapered to acute apex; dorsal margin with numerous fine regular teeth.

Material examined. 13♂♂ 11♀♀, China: Lingxian, Snow Mountain , Taichung, Taiwan Prov. , 10 April 2009, coll. Wen-Bin Yeh ( NCHU), Fargesia spathacea Franch (Bambusaeae) ; 32♂♂ 69♀♀, China: Dongfeng, Snow Mountain, Taichung, Taiwan Prov. , 3 August 2010, coll. Wen-Bin Yeh ( NCHU), Fargesia spathacea Franch (Bambusaeae) ; 17♂♂ 33♀♀, China: Qika mountain villa, Snow Mountain, Taichung, Taiwan Prov. , 9 June 2011, coll. Wen-Bin Yeh ( NCHU), Fargesia spathacea Franch (Bambusaeae) .

Remarks. This species resembles A. bisubula sp. nov., in appearance, but can be distinguished by: crown subconically anteriorly protruded, connective with stem as long as arms ( Fig. 19 ), shaft sinuate subapically ( Fig. 23 ). This species is strongly sexually dimorhpic in color and external morphology. It is easy to misidentify females and males as two different species. The male genitalia are described for the first time.

Host. Fargesia spathacea Franch (Bambusaeae) .

Distribution. China ( Taiwan).

Figures

FIGURES 1–12. Agrica arisana (Matsumura, 1914) 1. Adult ♂, dorsal view; 2. Adult ♂, lateral view; 3. Adult ♀, dorsal view; 4. Adult ♀, lateral view; 5. Head and thorax ♂, lateral view; 6. Head and thorax ♂, dorsal view; 7. Face ♂; 8. Abdomen apex ♂,ventral view; 9. Abdomen apex ♀, ventral view; 10. Face ♀; 11. Head and thorax ♀, dorsal view; 12. Head and thorax ♀, lateral view.Scale bar: 0.5 mm.

FIGURES13–25.Agrica arisana (Matsumura, 1914) 13.Forewing;14.Hindwing;15. Fore femur and tibia,anterior surface; 16. Female sternite VII; 17. Valve and subgenital plate, ventral view; 18. Male pygofer and anal tube, lateral view; 19. connective, ventral view; 20. Style, dorsal view; 21.Aedeagus, caudal view; 22.Male pygofer, ventral view; 23. Aedeagus and connective, ventral view; 24. First valvula, lateral view; 25. Second valvula; lateral view. Scale bar: 0.5 mm (13–16; 24–25); 0.2 mm (17–23).