Key to the species of the genus Cobelura Erichson, 1847

[translated and modified from Corbett (2004)].

1. Elytra with stripes of whitish-yellow or brown pubescence.....................................................2

- Elytra without stripes of pubescence of these colors..........................................................6

2. Elytra with oblique postmedian stripe of contrasting pubescence, or with longitudinal stripe of brown and gray pubescence; pronotum without stripe of whitish-yellow pubescence, or with 2 or 4 stripes......................................3

- Elytra without oblique postmedian stripe; each side of pronotum and elytra with band of whitish-yellow pubescence. Peru .................................................................................. C. lorigera Erichson, 1847

3. Elytra with longitudinal stripes of dark-brown and gray pubescence. Bolivia (Santa Cruz (Fig. 3)...... C. raphaeli sp. nov.

- Elytra with oblique postmedian stripe...................................................................... 4

4. Elytra with oblique postmedian stripe of whitish-gray or whitish–yellow pubescence; sides of prothorax rounded..........5

- Elytra with oblique, dark-brownish postmedian stripe; sides of prothorax divergent posteriorly. Costa Rica, Panama......................................................................................... C. claviger (Bates, 1885)

5. Pronotum with 4 longitudinal stripes of yellowish-white pubescence from base to apex; distal third of elytra with oblique yel- low line projecting posteriorly, parallel to suture. Costa Rica, Ecuador........................ C. wappesi Corbett, 2004

- Pronotum without longitudinal stripes; anterior third of elytral suture covered with dense white pubescence. Ecuador ......................................................................................... C. sergioi Monné, 1984

6. Elytra mottled with small patches of white pubescence, partially arranged in longitudinal lines or distributed irregularly.........................................................................................................7

- Elytra unicolor, without colored patches, uniformly covered light-gray pubescence. Costa Rica (Fig. 2)....................................................................................................... C. inornata sp. nov.

7. Elytra with small patches of white pubescence arranged in longitudinal lines; elytral carina from base to apex, parallel to suture. Colombia ............................................................... C. howdenorum Corbett, 2004

- Elytra with numerous small patches of whitish-yellow pubescence, distributed irregularly; elytral carina present, but less prominent...........................................................................................8

8. Elytra unicolor, reddish brown; prothorax with parallel sides, not narrowing before base. Ecuador ..................................................................................................... C. vermicularis Kirsch, 1889

- Elytra blackish or bicolor, prothorax with rounded sides, narrowing before base....................................9

9. Apical fifth of scape dark brown; elytra brownish red in basal half and dark brownish in distal half. Costa Rica, Panama.................................................................................... C. stockwelli Corbett, 2004

- Scape and elytra black. Peru, Bolivia............................................. C. peruviana (Aurivillius, 1920)