Euricania xizangensis Chou & Lu

Xu, Chang-Qing, Liang, Ai-Ping & Jiang, Guo-Mei, 2006, The Genus Euricania Melichar (Hemiptera: Ricaniidae) From China, Raffles Bulletin of Zoology 54 (1), pp. 1-10 : 8-9

Euricania xizangensis Chou & Lu

( Figs. 66-78 )

Euricania xizangensis Chou & Lu, 1981: 225 ; Chou et al., 1985: 70.

Material examined. – China: 4 males, 2 females, XIZANG: Motuo , 800-1100m, coll. G. D. Ren, 17 Aug.2003 (HU) ; 1 female, Muotuo, Maniwong , 930m, coll. F. S. Huang, 25 Aug.1974 ( IZCAS) ; 2 males, 2 females, Muotuo , coll. G. T . Jin , 13 Jul.1980 ( SIE) .

Length (incl. teg.). – Male 10.5-11.0 mm, female 11.0- 11.5 mm.

Description. – Head (incl. eyes) ( Fig. 66 ) wider than pronotum. Frons ( Fig. 67 ) piceous, sublateral carinae longer than half length of central carina at about 1:2; lateral carinae with basal part black and apical part light brown. Carina between eyes brown with median part black. Clypeus brown, central carina light brown. Vertex ( Fig. 66 ) piceous, wider at anterior margin than long in middle line about 12.8:1, posterior corner without macula or with indistinct macula; carinate laterally, without central carina; occipital margin carinate, piceous. Pronotum piceous, narrow, wider at widest part than long in middle line about 6:1; punctated beside central carina; anterior margin carinate. Mesonotum and mesopleura piceous.

Tegmina ( Fig. 68 ) with costal marginal fascia piceous, with a yellow or yellowish spot near middle, posterior corner of the spot with one very small white spot; apical area piceous; apical margin and inner margin with piceous fasciae; disc with one transverse piceous fascia which is interrupted or disappeared near claval suture; common stem of R1 and R2 longer than basal cell, common stem closed to claval suture. Wings ( Fig. 69 ) with apical margin with a piceous fascia, costal margin and inner margin without fasciae.

Legs brown; fore femora with 2-4 lateral spines; middle femora with 2-5 lateral spines. Abdomen piceous. Tegula dark brown or piceous. Eyes piceous, ocelli rufous.

Male genitalia. – Anal segment ( Figs. 70, 71 ) in dorsal view longer than wide at middle about 1.5:1, lateral margin convex, apical margin truncate, basal margin almost straight; ventral margin in profile ( Fig. 70 ) strongly convex; anal style set about in middle, close to apex. Aedeagus with connective symmetrical. Phallobase ( Fig. 73 ) with dorsal process short, directed laterad, shorter than half length of phallobase in middle line about 1:3.3; lateral process shorter than dorsal process at about 1:1.3. In ventral view ( Fig. 74 ), phallobase constricted medially, apex concave medially; lateral process shorter than phallobase in middle line about 1:2.6. In profile view ( Fig. 75 ), phallobase dilated near base. Genital styles ( Fig. 70 ) longer than wide at middle about 3:1.

Female genitalia. – Anal segment ( Fig. 75 ) rather small, ventral margin in profile slightly convex; anal style set beyond middle; in dorsal view ( Fig. 76 ), apical margin straight, ventral margin nearly straight, lateral margins convex. Gonophysis VIII ( Fig. 77 ) shoe-shaped, basal part and anterior part in a right angle, teeth of anterior part dilated apically. Pregenital sternite ( Fig. 78 ) with anterior margin produced forward medially. Bursa copulatrix with second pouch smaller than first pouch.

Distribution. – China (Xizang).

Remarks. – This species is similar to E. longa and E. facialis , but can be separated from E. longa by its shorter dorsal spinose process of male phallobase ( Fig. 72 ) and longer sublateral carinae of frons ( Fig. 67 ) and from E. facialis by its dilated basal part of male aedeagus ( Fig. 74 ), distinct carina of clypeus ( Fig. 67 ) and the whole black body.

Figures

Figs. 66-78. Euricania xizangensis Chou & Lu: 66, vertex, pronotum and mesonotum, dorsal view; 67, frons and clypeus; 68, tegmina; 69, wing; 70, male genitalia, left side; 71, male anal segment, dorsal view; 72, aedeagus, dorsal view; 73, aedeagus, ventral view; 74, aedeagus, left side; 75, female genitalia, left side; 76, female anal segment, dorsal view; 77, gonophysis VIII, right side; 78, pregenital sternite. Scale bars: Figs. 66, 67, 75 = 1.25mm; Figs. 68, 69 = 3.2mm; Fig. 70 = 0.635mm; Figs. 71-74, 76 = 0.4mm; Figs. 77, 78 = 0.5mm.