Abstract
A new black-fly species, Simulium (Morops) lilianae sp. nov., is described from a female that was reared from a pupa collected in Banaue, Luzon Is., Philippines. In the female, this new species is distinguished from all the eight known Morops species reported from the Philippines by the mandible with serrations on both sides. This new species, S. (M.) lilianae, is somewhat similar in the female to S. (M.) disneyi reported from Sulawesi by having the similar mandible, but easily separated from the latter by the size of the sensory vesicle and the coloration of the mid and hind tibiae. In the pupal stage, S. (M.) lilianae is distinctive within this subgenus by having the antler-like gills.
