| Scientific name | Authorship | Rank | Status | Images | |
|---|---|---|---|---|---|
| Idaea paraplesia | (Prout L. B., 1916) | species | Synonym | ||
| Idaea particolor | (Prout L. B., 1922) | species | Misapplied | ||
| Idaea pediculata | (Fletcher D. S., 1958) | species | Accepted | ||
| Idaea pericalles | (Prout L. B., 1913) | species | Accepted | ||
| Idaea pericallis | auct. | species | Misapplied | ||
| Idaea plesioscotia | (Prout L. B., 1925) | species | Accepted | ||
| Idaea poecilocrossa | (Prout L. B., 1932) | species | Accepted | ||
| Idaea prionodonta | (Prout L. B., 1932) | species | Accepted | ||
| Idaea prosartema | (Herbulot, 1955) | species | Accepted | ||
| Idaea prucholoma | (Prout L. B., 1932) | species | Accepted | ||
| Idaea pulveraria | (Snellen, 1872) | species | Accepted | ||
| Idaea pulveraria agrammaria | (Mabille, 1900) | subspecies | Accepted | ||
| Idaea pulveraria inobtrusa | (Warren, 1898) | subspecies | Synonym | ||
| Idaea pulveraria pulveraria | (Snellen, 1872) | subspecies | Accepted | ||
| Idaea pulveraria subculta | (Prout L. B., 1916) | subspecies | Accepted | ||
| Idaea punctigera | (Janse, 1935) | species | Accepted | ||
| Idaea purpurascens | (Prout L. B., 1916) | species | Accepted | ||
| Idaea remanei | Wiltshire, 1985 | species | Accepted | ||
| Idaea rufifascia | (Prout L. B., 1916) | species | Accepted | ||
| Idaea rufimixta | (Warren, 1901) | species | Accepted | ||
| Idaea rufulata | (Warren, 1901) | species | Misapplied | ||
| Idaea sanctaria | (Staudinger, 1900) | species | Accepted | ||
| Idaea shaatensis | Hausmann, Stadie & Fiebig, 2016 | species | Misapplied | ||
| Idaea shaathensis | Wiltshire, 1986 | species | Accepted | ||
| Idaea sinuilinea | (Prout L.B., 1913) | species | Accepted |