Great-spangled Fritillary (Speyeria cybel)
One record has been reported by Edward Lambremont in his 1954 article in Tulane Studies in Zoology, Volume 1, number 10, April 30, 1954.  He said that a specimen was taken in the costal area but did not specify exactly where.  None has been seen since that time.  This is really a northern species in the US.  The closest the range of this species comes to Louisiana is southern Arkansas.  I think this record is questionable.