The family Erebidae (Lepidoptera, Noctuoidea) is one of four quadrifid noctuoid families recently redefined by Zahiri et al. (2011) and Zaspel et al. (2012). Fibiger and Lafontaine (2005) verified the monophyly of Erebidae in terms of morphology but retained Arctiidae and Lymantriidae as separate families. These two groups were readjusted as erebid subfamilies in the latest phylogeny of Noctuoidea (Zahiri et al., 2011), and by van Nieukerken et al. (2011). Erebidae, as currently defined comprises 1760 genera and 24.569 species (van Nieukerken et al., 2011), representing the largest family of the Lepidoptera. The quadrifid Noctuoidea describes taxa in which forewing vein M2 arises closer to the origin of M3 than M1, in the lower part of the discal cell, so that the cubital vein appears to be four-branched; M2 in the hindwing is present giving vein Cu a four-branched appearance. Taxonomic study of the Arctiidae in Cambodia has been done by a few foreign entomologists. As the results of this study, about 98 species of 45 genera belonging to Arctiidae were recorded from Cambodia, most of them are recorded for the first time in Cambodia.

The family Arctiidae belonging to superfamily Noctuoidea, it was divided into three subfamilies: Lithosiinae, Arctiinae, and Syntominae (Kitching and Rawlins, 1999; Conner, 2009). The family include 11,155 species of 750 genera worldwide (Heppner, 2005). About 6000 species distribute in the Neotropics but the family is represented in all the main zoogeographical regions (Scoble, 1992). Taxonomic study of the Arctiidae in Cambodia has been done by a few foreign entomologists. As the results of this study, about 90 species of 40 genera belonging to Arctiidae were recorded from Cambodia, most of them are recorded for the first time in Cambodia. 21 species are briefly redescribed in this study such as: Nyctemera coleta (Boisduval, 1832), Brunia antica (Walker, 1854), Darantasia cuneiplena (Walker, 1859), Eilema longpala (Holloway, 2001), Cabarda sequens (Walker, 1862), Lyclene lutara (Moore, 1859), Teulisna steineri (Holloway, 2001), Cyana obliquilineata (Hampson, 1900), and Cyana quadrinotata (Walker, 1897), etc.