Thrypticus is a genus of long-legged flies in the family Dolichopodidae. There are about 90 described species in Thrypticus. All known larvae of the genus are phytophagous stem-miners of plants in the families Cyperaceae, Poaceae, Juncaceae, and Pontederiaceae. Female adults have a strong, pointed ovipositor used to pierce and insert eggs in the stems of the plants.