Definition of "pearlaceous" [pearl•a•ceous]

• Resembling pearl or mother-of-pearl; pearly. (adjective)

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• "Body black; antennae piceous, dull honey-yellow towards the tip, distinctly compressed; — joints, in profile a little narrowed to the base; palpi piceous, not at all securiform, terminal joint less dilated at tip than tiiat of the preceding joint; thorax with a slight pearlaceous re - flection, rather narrower at tip than at base; lateral margin depressed,"