May 28, 2013 — A new butterfly species from Texas, given the common name Vicroy's Ministreak, was discovered because of its striking olive green eye color, and was given a formal scientific name (Ministrymon janevicroy). This beautiful new butterfly may be the last truly distinctive butterfly species to be discovered in the United States.
Although individuals of Vicroy's Ministreak were deposited in the Smithsonian entomology collections a century ago, this species was unrecognized because it was confused with the common, similar-looking Gray Ministreak. Interestingly what distinguishes the two species is the distinctive olive-green eyes of the new species in contrast to the dark brown/black eyes of the Gray Ministreak.
As their common names suggest both species are diminutive, about the size of a thumbnail, and may occur at the same time and place. Besides eye color, each has different wing patterns and different internal structures. They have different, but overlapping, geographic distributions and habitat requirements.
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