Dialithus

Ramírez-Ponce, Andrés, 2014, Giesbertiolus curoei, a new species of flower chafer from Panama with transitional characters (Coleoptera: Scarabaeidae: Cetoniinae: Trichiini), Zootaxa 3795 (5), pp. 557-563 : 561

Key to the genera Dialithus and Giesbertiolus and to the females of Giesbertiolus species

(the female of G. festivus is unknown)

1 Pronotum; disc with 3 indented, iridescent, longitudinal bands; lateral border angulate; scutellum with iridescent blotch; pygidium and last abdominal sternite without a conspicuous, transversal carina; protibia with teeth on external border separated; apex of metatibia crenulated, with conspicuous spinules............................................ Dialithus Parry

- Pronotum; without or with 1 indented, iridescent, longitudinal band; lateral border rounded; scutellum without iridescent blotch; pygidium and anal plate with a conspicuous, transversal carina; protibia with teeth on external border contiguous; apex of metatibia deeply emarginated, without or with at least 2 or 3 tiny spinules................... Giesbertiolus Howden ....2

2 Clypeus deeply emarginate, mesometasternal process extending past anterior margin of mesocoxae. Panama............................................................................................... G. c uroei Ramírez-Ponce

- Clypeus not deeply emarginate, mesometasternal process not reaching past apex of mesocoxae........................ 3

3 Body length more than 20 mm, iridescent markings on head absent, and iridescent markings on pronotum present only along lateral margins. Costa Rica................................................................ G. linnaei Krikken

- Body length less than 12.5 mm, iridescent markings on head present as marginal lines and on pronotum as band on midline and along lateral margins. Panama............................................................. G. ornatus Howden