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Melchus Lacordaire, 1866

Diagnosis: Small to moderately large, 8-10 mm in total body length; broadly oval and compressed (flat) in form, black or black with red markings; antennal funicle of 6 articles, apex extended beyond posterior margin of eye; rostrum markedly laterally compressed in at least apical one-half, curved ventrally; anterior margin of pronotum straight behind eye, pronotal disk and elytra lacking setose nodules, smooth (some species in South America have setose nodules); tarsus of 5 articles, but article 4 small, located at very base of article 3, article 3 distinctly wider than 2, bilobed ventrally; front coxae separated; pygydium exposed beyond elytra; metepisternum narrow, length 3 or more times width; scutellum rhomboidal or subcircular, widest at middle.

Natural history: No significant information.

Diversity: Five species of Melchus are known from Central and South America. Only Melchus gomezi Anderson is known from Costa Rica.

Melchus gomezi Anderson

Distribution: Costa Rica.

Natural history: No significant information.