| Scientific name | Authorship | Rank | Status | Images | |
|---|---|---|---|---|---|
| Idaea lalasaria | (Swinhoe, 1904) | species | Accepted | ||
| Idaea laticlavia | (Prout L. B., 1922) | species | Accepted | ||
| Idaea leptatibia | Fletcher D. S., 1978 | species | Accepted | ||
| Idaea leucorrheuma | Prout L. B., 1932 | species | Accepted | ||
| Idaea lilliputaria | (Warren, 1902) | species | Accepted | ||
| Idaea limbolata | (Mabille, 1900) | species | Accepted | ||
| Idaea lipara | (Prout L. B., 1917) | species | Accepted | ||
| Idaea lycaugidia | (Prout L. B., 1932) | species | Accepted | ||
| Idaea macrospinata | Hausmann, 2006 | species | Accepted | ||
| Idaea macrostyla | (Warren, 1900) | species | Accepted | ||
| Idaea maisongrossei | Herbulot, 1978 | species | Accepted | ||
| Idaea malescripta | (Warren, 1897) | species | Accepted | ||
| Idaea mathetica | (Prout L. B., 1934) | species | Accepted | ||
| Idaea microptera | (Warren & Rothschild, 1905) | species | Accepted | ||
| Idaea mimetes | (Brandt, 1941) | species | Accepted | ||
| Idaea mimetes kruegeri | Hausmann, 2009 | subspecies | Accepted | ||
| Idaea minimaria | (Warren, 1904) | species | Accepted | ||
| Idaea monticola | Hausmann, 2006 | species | Accepted | ||
| Idaea nasifera | (Prout L. B., 1916) | species | Accepted | ||
| Idaea neavei | Wiltshire, 1952 | species | Synonym | ||
| Idaea nigrosticta | (Warren, 1897) | species | Accepted | ||
| Idaea nili | (Wiltshire, 1949) | species | Synonym | ||
| Idaea nitescens | (Warren, 1902) | species | Synonym | ||
| Idaea ossicolor | (Janse, 1935) | species | Accepted | ||
| Idaea parallelaria | (Warren, 1902) | species | Accepted |