Casey’s inspiration for designing his Panty Dropper (P.D.) nymph pattern, came as a result of extensive time collecting live specimens.  He wanted a highly accurate P.M.D. imitation that combined realistic traits, like the fibbett antennae, with enough subtle flash to set it apart from the underwater mix.  The enlarged wing case of the pattern is perhaps its most dynamic characteristic.  This element was included to parallel the distended state of that feature in naturals as they near emergence.