Stenotarsus Perty 1832

1) Antennomeres III–VIII not elongate, moniliform; antennal club segments narrow, nearly parallel sided (Fig. 1) ---------------- S. validicornis Gerstaecker

1') Some or all of antennomeres III–VIII elongate; antennal club segments not narrowed (Figs. 2, 3) ----------------------------------------------------------------------------------------- 2

2) Antennomere XI elongate and appearing curved (Fig. 2); antenna long, reaching middle of elytra ---------------------------------------- S. purpuratus Gerstaecker

2') Antennomere XI oval, not elongated or curved (Fig. 3); antenna not as long, reaching only basal 1/3 of elytra -------------------------------------------------------------- 3

3) Pronotal lateral margin relatively narrow (Fig. 4), width at hind angle distinctly less than length of antennomere II ------- S. cyanopterus Gorham

3') Pronotal lateral margin broad for entire length (Figs. 5–7), width at hind angle equal or greater than length of antennomere II ---------------------------------- 4

4) Base of pronotum between pores with margin weak or absent (Fig. 5); pronotal base weakly concave over scutellum --- S. lemniscatus Gorham

4') Base of pronotum between pores with strong margin that leads into the pores (Figs. 6, 7); pronotal base convex over scutellum ---------------------------- 5

5) Elytron with basal punctures in the depression next to the humerus not much larger than those near the scutellum (Fig. 6); disc of elytron with weak foveate punctures ------------------------------------------------------------- S. subtilis Arrow

5') Elytron with coarse basal punctures in the depression next to the humerus distinctly larger than those near the scutellum (Fig. 7); disc of elytron with notable foveate punctures, often impressed ------------------------------------------------------ 6

6) Body relatively elongate and small, less than 4.5 mm (Fig. 8) ------------------------- ------------------------------------------------------------------------------------------------------------------------- S. cuprivestis Gorham

6') Body oval and larger, generally more than 4.5 mm (Figs. 9, 10) ----------- 7

7) Body with color pattern (Fig. 9) --------------------------------------------------------------------------- 8

7') Body entirely orange (Fig. 10) ------------------------------------------------------------------------------ 9

8) Pronotal pubescence dark purple to black (best viewed in profile); metafemur of male with basal spine (Fig. 11) -------- S. globosus Guérin­Méneville

8') Pronotal pubescence golden­yellow; metafemur of male lacking spine ------ -------------------------------------------------------- S. panamanus Gorham and S. chiriquinus Arrow

9) Male metatrochanter lacking spine; male genitalia long and narrow (Fig. 15) ----------------------------------------------------------------------------------------- S. panamanus Gorham

9') Male metatrochanter with spine (Figs. 12–14); male genitalia relatively short and broad (Figs. 16–18) ----------------------------------------------------------------------------- 10

10) Male with circular depression on anterior part of metasternum (Fig. 12); male genitalia simple, lacking accessory process (Fig. 16) ------------------------- ----------------------------------------------------------------------------------------------------------------------- S. obtusus Gerstaecker

10) Male with transversely elongated depression on anterior part of metasternum (Fig. 13); male genitalia with an accessory process (Fig. 17) ----- ---------------------------------------------------------------------------------------------------------------------------------------- S. ovalis Arrow