About Plusiinae 

The subfamily Plusiinae comes under family Noctuidae and Superfamily Noctuoidea. This is a large family made up of species with a diverse range of characteristics. They are small to large moths with a wingspan ranging from 100 to 170 mm depending upon the species. The adults mainly fly at night and due to their nocturnal habits they were called as Noctuids. 

The subfamily Plusiinae (Lepidoptera: Noctuidae) is comprised of moths with a robust body, small to average size, usually with a characteristic metallic spot in the center of the forewing. Their larvae, known as semi-loopers, are characterized by the combination of biordinal crochets with the two pairs of prolegs, on abdominal segments three and four, absent or vestigial. 

Diagnosis

Head roughly scaled, with prominent frontal hair tufts, eyes large with stronger eyelashes. Labial palpus usually short, upturned, with second segment densely hairy. Probosis well developed. Abdominal dorsal crest present. Forewing broad with acute apex. Bright coloured with smaller or larger metallic pattern present or silvery white to yellow sigma mark. Male genitalia, uncus longer and narrower, valva oval, rectangular or elongate. Vesica with variable shape and sizes. Female genitalia, ovipositor laterally flattened; corpus bursae ovate, elongate with variable shape and sizes.