Dichotomius

Key for the species of the “ buqueti View in CoL ” species-group and species that may be confused *

1. Males andfemales with calluseson head, elytra andpronotum givingacorrugatedappearance ....................... D. ribeiroi View in CoL *

- Males and females without calluses on head, elytra and pronotum ................................................................ 2

2. Males and females with elytral striae of one through five widenedinthebasalarea ( Fig. 7A View Fig ) .............. D. nutans View in CoL ( Fig. 7 View Fig )

- Malesand femaleswithout widenedelytralstriae ( Figs.5 View Fig A–6A) ..................................................................... 3

3. Large size (27–37 mm), elytra withblue overtones. Males with long, acute cephalic lateral processes (2 mm or more), females with fourpointprocess ................................ D. buqueti View in CoL ( Fig. 5 View Fig )

- Medium size (18–28 mm), black elytra. Males with small lateral cephalic processes (less than 1 mm), females with cephalic processsimilartotheprocessesof themale ............. D. haroldi View in CoL ( Fig. 6 View Fig )