Eurycyphon

Key to males of Eurycyphon

1 Dorsal side strikingly bicolourous......................................................................... 2

1' Dorsal side unicolourous................................................................................ 3

2 Base strikingly lighter than rest of elytra........................................................ E. fulvus Watts

2' Fore body bright red, elytra dark........................................................... E. tomweiri n. sp.

3 Head and pronotum with coarse granular punctures; terminalia Figs. 68–73 ........................... E. perlatus n. sp.

3' Normal fine punctures on entire surface.................................................................... 4

4 Pala and distal part of penis of similar length, parameroids longer than trigonium (e.g., Figs. 63, 75). Plate of T8 transverse, short stout pegs along caudal edge (Figs. 61, 65)............................................................. 5

4' Pala 2 or more times longer than the trigonium which is longer than the parameroids (e.g., Figs. 41, 49). No pegs along caudal edge of T8........................................................................................... 6

5 Parameroids ending in a long curved spine; trigonium with long apical process (Fig. 63)............... E. castaneus n. sp.

5' Trigonium and parameroids without long pointed processes (Fig. 75)................................. E. parvus n. sp.

6 Trigonium spherical, with 3 horn-like processes (Fig. 60)......................................... E. tricornis n. sp.

6' Trigonium parallel-sided, no horns, only a delicate tongue directed ventrad from apex (e.g., Fig. 41).................... 7

7 Each paramere ventrally with a large triangular sclerite, the paramere apex is a slender plate with serrate ventral edge (Fig. 51)........................................................................................ E. aquilus Watts

7' No separate ventral subterminal sclerites on parameres....................................................... 8

8 Paramere ending in two hooks curved in opposite directions (Figs. 52, 55)........................... E. falcatus n. sp.

8' Apex of paramere a compact convoluted body (e.g., Figs. 48, 50)............................................... 8

9 Penis waisted, front of pala wide, a strong hook projects from paramere apex (Figs. 47, 48).......... E. barringtoni n. sp.

9' Pala lanceolate, front narrow, tegmen without projecting tooth at apex (Figs. 49, 50)................... E. thunguttii n. sp.