The New International Encyclopædia/Diamond Beetle

​DIAMOND BEETLE. The common name of a South American weevil (Entimus imperialis), so named because of its brilliant coloration. It is an inch or more in length, with a black surface covered with punctures lined with oval scales that reflect such a brilliant green that the entire elytra appear green instead of black. The color changes with varying reflected light, and is purely optical and not due at all to any pigment.

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