Leptolalax melicus (Appleby's Asian toad; Khmer: កង្កែបស្លឹកមេលីកឺស, kangkaep slaek melikeus) is a frog species in the family Megophryidae. It is endemic to Cambodia where it is only known from near its type locality, Virachey National Park, Ratanakiri Province; it is expected to have a wider distribution that may reach Laos and Vietnam. Leptolalax melicus have only been found near rocky streams in evergreen forest between 650–850 m (2,130–2,790 ft) altitude.