Project Tiger was a collaborative effort to study entomological diversity in Thailand in 2007 through 2009 that involved the University of Kentucky, Thai field researchers, and world taxonomic specialists. Three new species of scorpionflies (Mecoptera: Panorpidae) are described from material acquired during Project Tiger and during subsequent collecting by the author. These are: Neopanorpa normpennyin. sp., a remarkable species with a greatly elongated process on the male 3^rd tergum extending caudally nearly to the genital bulb, Neopanorpa arcuatan. sp., a scorpionfly with unique arched male hypovalves, and the first species of Panorpa from Thailand, Panorpa auripennisn. sp., with unusual golden yellow wings. Collection data for Mecoptera taken by Project Tiger are presented. Efforts by Project Tiger and follow up collecting bring the number of species of Mecoptera occurring in Thailand to 17, including 15 species of Neopanorpa Weele, 1909, one Panorpa Linnaeus, 1758, and one Bittacus Latreille, 1805, and the number of Mecoptera species known from Indochina to 51, including 44 Neopanorpa, two Panorpa, four Bittacus, and one Bicaubittacus Tan & Hua, 2009.