A truly beastly rhinoceros beetle (Dynastinae: Bothynus sp.) from Panama. She might be a docile vegetarian, but those spurs on her legs are quite capable of a good pinch if she's mishandled.
Broad-nosed weevil (Entiminae: Eustylini: possibly Exophthalmus sulcicrus) from Panama.
Darkling beetle (Tenebrionidae: Strongylium sp.) from Panama.