Source : Webster's Revised Unabridged Dictionary (1913)

Colorado beetle \Col`o*ra"do bee"tle\ (Zo["o]l.)
   A yellowish beetle ({Doryphora decemlineata}), with ten
   longitudinal, black, dorsal stripes. It has migrated
   eastwards from its original habitat in Colorado, and is very
   destructive to the potato plant; -- called also {potato
   beetle} and {potato bug}. See {Potato beetle}.

Source : WordNet®

Colorado beetle
     n : black-and-yellow beetle that feeds in adult and larval
         stages on potato leaves; originally of eastern Rocky
         Mountains; now worldwide [syn: {Colorado potato beetle},
         {potato bug}, {potato beetle}, {Leptinotarsa decemlineata}]