Two new species of the bamboo-feeding planthopper genus Arcofacies Muir (Hemiptera: Fulgoroidea: Delphacidae) from China Author Li, Hongxing Author Yang, Lin Author Chen, Xiangsheng text Zootaxa 2019 2019-12-09 4706 2 384 390 journal article 24693 10.11646/zootaxa.4706.2.11 12408039-68f1-44c0-9aa4-7542340b1f30 1175-5326 3567318 E265037B-4DC0-4FE8-8BFE-98CE4377CBBD Key to species (males) of Arcofacies from China (revised from Hou & Chen 2010 ) 1. Lateroapical angles of anal segment of male truncate, without spinous process ( Chen et al. 2007 : Fig. 6 )... A. fullawayi Muir – Lateroapical angles of anal segment produced into a stout spinous process respectively ( Figs 7 , 19 ).................... 2 2. Aedeagus simple, without elongate spinous process ( Chen et al. 2007 : Fig. 16 ).................. A. maculatipennis Ding – Aedeagus with long spinous process at middle or at base ( Figs 9, 10 , 22 )......................................... 3 3. Aedeagus with 2 long spinous processes at middle ( Ding 1990 : Fig. 6 ).......................... A. strigatipennis Ding – Aedeagus with long spinous process at base ( Figs 9, 10 , 22 )................................................... 4 4. Pygofer in posterior view without medioventral process ( Hou & Chen 2010 : Fig. 11 ); apex of genital style forked ( Hou & Chen 2010 : Fig. 15 )..................................................................... A. moliensis Hou & Chen – Pygofer in posterior view with medioventral process ( Figs 7 , 19 ); apex of genital style not forked ( Figs 11 , 23 )........... 5 5. Pygofer in posterior view with small medioventral process, flake-shaped ( Chen et al. 2007 : Fig. 28); aedeagus with apex round and blunt ( Chen et al. 2007 : Fig. 31).................................................... A. ampelocalamus Chen – Pygofer in posterior view with 4 spinous medioventral processes ( Figs 7 , 19 ); aedeagus with apex acute, directed ventrad ( Figs 9 , 22 )............................................................................................... 6 6. Anal segment with lateroapical processes symmetrical ( Fig. 7 ); middle ventral margin of aedeagus with small process ( Figs 9, 10 )................................................................................ A. longispinus sp. nov. – Anal segment with lateroapical processes asymmetrical, left one distinctly longer than right one ( Figs 19, 21 ); middle ventral margin of aedeagus without process ( Fig. 22 )................................................... A. varius sp. nov