Stenoscelis, Wollaston, 1861

Key to Japanese species of Stenoscelis View in CoL

1 Upper margin of scrobe directed to middle of eye ( Figs 2, 4, 6 View FIGURES 1–6 , 18, 20, 22 & 24 View FIGURES 17–24 )................................... 2

- Upper margin of scrobe directed to lower margin of eye ( Figs 41, 43, 45 & 47 View FIGURES 40–47 ).................................... 6

2 Epistome with a pair of tufts of long setae basally ( Fig. 68 View FIGURE 68–73 ); apex of elytra conjointly acuminate ( Fig. 78 View FIGURE 78–83 )..... S. acutipennis View in CoL

- Epistome with six long setae basally ( Figs 69–77 View FIGURE 68–73 View FIGURE 74–77 ); apex of elytra conjointly rounded ( Figs 79–81 & 83 View FIGURE 78–83 ) or separately produced in a small process ( Fig. 82 View FIGURE 78–83 ).............................................................................. 3

3 Elytral intervals on declivity with setae as long as or shorter than granules and arranged irregularly in two or three rows ( Fig. 79 View FIGURE 78–83 ).................................................................................... S. brevithoracicus

- Elytral intervals on declivity with setae longer than granules and each arranged behind a granule in a single row ( Figs 80–82 View FIGURE 78–83 ) ................................................................................................... 4

4 Rostrum dorsally concave in male, convex in female ( Figs 18 & 20 View FIGURES 17–24 ); striae of elytra on declivity reticulate, without punctures ( Fig. 80 View FIGURE 78–83 )................................................................................... S. cavirostris

- Rostrum dorsally convex in both sex ( Figs 22 & 24 View FIGURES 17–24 ); striae of elytra on declivity not reticulate, with a row of punctures ( Figs 81 & 82 View FIGURE 78–83 )............................................................................................ 5

5 Apex of elytra conjointly rounded ( Fig. 81 View FIGURE 78–83 ), obtusely angulated in lateral view ( Fig. 22 View FIGURES 17–24 ); aedeagal body approximately 1.4 times as long as wide, 1.0 times as long as apodeme ( Figs 30 & 31 View FIGURES 30–34 ); spermatheca with collum developed and ramus not developed ( Fig. 34 View FIGURES 30–34 )................................................................................. S. longisetosus View in CoL

- Apex of elytra separately produced in a small process ( Fig. 82 View FIGURE 78–83 ), acutely angulated in lateral view ( Fig. 24 View FIGURES 17–24 ); aedeagal body approximately 1.7 times as long as wide, 1.4 times as long as apodeme ( Figs 35 & 36 View FIGURES 35–39 ); spermatheca with collum and ramus developed ( Fig. 39 View FIGURES 35–39 )............................................................................... S. aceri View in CoL

6 The subapical sclerotized structure of endophallus with a large spatulate projection on dorsal side. ( Figs 48 & 49 View FIGURES 48 –52 )...................................................................................................... S. matobai

- The subapical sclerotized structure of endophallus with a pair of projections on dorsal side ( Figs 53, 54 View FIGURES 53–57 , 58, 59 View FIGURES 58–62 , 63 & 64 View FIGURES 63–67 )... 7

7 The subapical sclerotized structure of endophallus reniform ( Fig. 53 View FIGURES 53–57 )................................... S. reniformis

- The subapical sclerotized structure of endophallus ovate ( Figs 58 View FIGURES 58–62 & 63 View FIGURES 63–67 ).......................................... 8

8 The subapical sclerotized structure of endophallus without separated part basally; the pair of projection on dorsal side short ( Figs 58 & 59 View FIGURES 58–62 )............................................................................ S. gracilitarsis View in CoL

The subapical sclerotized structure of endophallus with a separated part basally; the pair of projection on dorsal side long ( Figs 63 & 64 View FIGURES 63–67 )............................................................................... S. ogasawarensis