Randallopsallus, : SCHUH & MENARD, 2013

Yasunaga, Tomohide, Duwal, Ram Keshari & Jsps, 2017, Two new species of the phyline plant bug genus Randallopsallus from Southeast Asia (Hemiptera: Heteroptera: Miridae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 57 (2), pp. 457-471 : 463

Key to the species of Randallopsallus

1. Body small, narrower than 1.45 mm in dorsal view; antennal segment II uniformly dark brown ( Figs 6–8 ), shorter than 0.84 mm; known from Peninsular Malaysia. .................... ....................................................................................................... R. malayanus sp. nov.

– Body wider than 1.50 mm in dorsal view; at least basal half of antennal segment II yellowish (in fresh specimen reddish) brown ( Figs 10, 15–17 ), longer than 0.90 mm. ..................... 2

2. Antennal segment III equal to or more than twice as long as I ; apical half of metafemur (except for obscure subapical ring) yellowish brown ( Fig. 10 ); metatarsomere II about 1.5 times as long as metatarsomere I; N. Sumatra. ............................... R. berastagi sp. nov.

– Antennal segment III less than twice as long as I; metafemur almost uniformly dark or chocolate brown (reddish brown in teneral and fresh individuals) ( Figs 12–13 ); metatarsomere II about twice as long as tarsomere I; central Thailand. ........................................ ..................................................................................... R. paracastaneae Yasunaga, 2013

Figures

Figs 1–6. Habitus images of phyline plant bugs, live adult individuals. 1 – Randallopsallus paracastaneae Yasunaga, 2013 (all attracted to UV light trap) (SERS, Thailand), 2–3 – Hypseloecus castaneus Yasunaga, Yamada & Artchawakom, 2015 (2 – J, Chaiyaphum, Thailand; 3 – ♀, Nakhon Nayok, Thailand), 4 – Sthenaridea piceonigra (Motschulsky, 1863) (J, Yangon, Myanmar), 5 – Psallus edoensis Yasunaga & Vinokurov, 2000 (♀, Tokyo, Japan).

Figs 6–17.Habitus images of Randallopsallus spp. (6, 9, 10 – dorsal, 7, 8, 12–13 – ventral, 14–17 – left lateral views). 6–8, 14 – R. malayanus sp. nov. 9–10, 15 – R. berastagi sp. nov. 11–13, 16–17 – R. paracastaneae Yasunaga, 2013.