Montandoniola bellatula Yamada, n. sp.

Montandoniola bellatula Yamada, n. sp.

(Figs. 3, 4, 8–10, 12, 17–20)

Diagnosis. Recognized by the following characters: Body (Figs. 3, 4) smaller and wider than its congeners. Antennal segment II about 0.6 times as long as head width across eyes. Hemelytra (Figs. 3, 4) mostly off– white; inner margin of clavi, base and apex of embolium, and cuneus black to brownish black; membrane semitransparent, with blackish patch on apical half. Pygophore (Fig. 17) swollen at left lateral margin; flagellum (Figs. 18, 19) apically curved. Copulatory tube (Fig. 20) noticeably long, straight.

Description. Coloration. Body (Figs. 3, 4) generally black, shiny on dorsal and ventral surfaces. Head, thorax, and abdomen uniformly black. Eyes and ocelli reddish black. Antenna (Figs. 3, 4, 9, 10) black to brownish black except for pale yellow segment III in female; segment IV reddish brown. Rostrum entirely black. Hemelytra (Figs. 3, 4) mostly off–white; inner margin of clavi, base and apex of embolium, and cuneus black to brownish black; membrane semitransparent, with blackish patch on apical half. Legs generally black; fore tibiae pale yellow except for fuscous at base; apex of tarsi and base of claws tinged with dark brown.

Structure. Body (Figs. 3, 4) oblong oval, smaller and wider than the other congeners. Head (Figs. 3, 4, 8) smooth on dorsal surface, slightly shorter than head width across eyes, sparsely covered with silky, short, recumbent setae; pairs of long, erect setae present on side of tylus, anterior part of inner margin of eye, and between eye and ocellus; anteocular portion about 1.2 times as long as length of eye in dorsal view; vertex approximately 2.3 times as wide as eye in dorsal view; postocular portion slightly constricted, shorter than that of M. ishikawai; eyes poorly setose; ocelli small. Antennae (Figs. 9, 10) densely covered with short recumbent and long suberect setae; long suberect setae slightly longer than or as long as width of the segment; segment I just reaching apex of head; segment II clublike in male, about 0.6 times as long as head width across eyes; segment III about 0.8 times as long as segment II; segment IV weakly flattened, subequal to or slightly longer than segment III. Rostrum stout, nearly reaching fore coxae, with sparsely distributed, silky, short, erect setae; segment II thicker than the other segments; segment III longer than three times of segment II; segment IV approximately 0.8 times as long as segment III.

Pronotum (Figs. 3, 4, 8) wider trapezoidal, highly polished, impunctate, sparsely clothed with silky, short, recumbent setae, bearing four distinct corner setae and a pair of long erect setae at anterior angle of callus; anterior margin nearly straight, about 1.3 times as long as mesal length; lateral margin nearly straight and strongly carinate at anterior 2/3; posterior margin shallowly concave, twice as wide as anterior margin in male, about 2.2 times as wide as anterior margin in female; collar long, weakly rugose, with short setae; callus swollen; posterior half of pronotum weakly depressed, transversely rugose. Scutellum (Figs. 3, 4) almost smooth, extremely swollen on anterior half and depressed on posterior half, with a pair of long, erect setae on basal 1/4 of lateral margin. Hemelytra (Figs. 3, 4) subparallel-sided, impunctate, sparsely covered with silky, short, recumbent setae; apical part of corium twice as wide as that of embolium; cuneal margin 0.43 times as long as embolial margin; cuneus with short setae at apex. Ostiolar peritreme (Fig. 12) accompanied with narrow, smooth, shining area anterior to gutter and broad a lutaceous area posterior to gutter; smooth shining area gradually acute toward anteriorly; evaporative area narrower than that of M. ishikawai. Legs densely covered with yellow, recumbent setae; hind tibiae weakly depressed. Abdomen covered with rows of short setae on ventral surface of each segment; seventh and eighth sterna laterally with pairs of long, suberect setae; scissure on abdominal tergite reaching end of posterior margin of third segment.

Male genitalia (Figs. 17–19): Pygophore (Fig. 17) swollen along left lateral margin in dorsal view, posteroventrally covered with 6–9 long and stout setae; cone narrower than that of M. ishikawai, tapering at apex, elevated at apex in lateral view; flagellum (Figs. 18, 19) apically curved, about 1.2 times as long as width of cone.

Female genitalia (Fig. 20): Copulatory tube (Fig. 20) mesally located at sternum VII, a little separated to base of ovipositor, noticeably long, slender, straight, accompanied with strongly sclerotized basal part leading into membranous and elongate apex.

Measurements [% (n=2) /Ψ (n=2)]. Body length 1.50–1.70/1.76–1.80; head length 0.26–0.29/0.31; head width across eyes 0.31/0.31–0.33; vertex width 0.16–0.18/0.19; width between ocelli 0.11–0.13/0.14; length of antennal segments I–IV: 0.08–0.09/0.10–0.11, 0.18–0.19/0.20, 0.15/0.16, 0.16–0.17/0.18; length of last three rostral segments II–IV: 0.06–0.07/0.09, 0.20/0.22, 0.15–0.16/0.17; anterior pronotal width 0.30–0.31/ 0.30–0.31; mesal pronotal length 0.23–0.25/0.26; basal pronotal width 0.60–0.63/0.68–0.69; length of embolial margin 0.53–0.54/0.63; length of cuneal margin 0.23–0.24/0.28; maximum width across hemelytra 0.63/ 0.67–0.70.

Holotype. % (with glass slide No. OPU–KY166 for genitalia), “ INDONESIA, Bali, Buleleng, Melanting, S08°10’56.7’’ E114°40’55.7’’, 150m alt., 17.viii.2006, T. Ishikawa leg.”.

Paratypes. INDONESIA: 1%, 2Ψ (Figs. 4, 10, 12, 20), Bali, Buleleng, Melanting, S08°10’56.7’’ E114°40’55.7’’, 150m alt., 17.viii.2006, T. Ishikawa.

Distribution. Indonesia (Bali Island).

Etymology. From the Latin bellatulus (=pretty, beautiful), referring to the small beautiful body of this new species; an adjective.

Remarks. This new species differs from its congeners by the much smaller body (Figs. 3, 4); antennal segment II being about 0.6 times as long as head width across eyes (Fig. 8); the apically curved flagellum (Figs. 18); and the noticeably long, slender, and straight copulatory tube (Fig. 20). In having mostly off-white hemelytra, this new species is similar to M. sawtellense. However, it is easily distinguished from the latter by the fore tibiae being pale yellow except for fuscous at base (in M. sawtellense, uniformly dark brown); the flagellum not being bifurcated (Figs. 18, 19) (vs. bifurcated); and the noticeably long, slender, and straight copulatory tube (Fig. 20) (vs. longer, slightly convoluted).