About Acronicta pruinosa (Guenée, 1852)
The wingspan of Acronicta pruinosa is 44 mm in males and 46 mm in females. Palps are upturned in both sexes, and have a short third joint. In males, the head and thorax are greyish white; the thorax is covered in scales. The abdomen is whitish, with an ochreous tinge at the base and becomes fuscous towards the tip. The forewings are whitish grey, with indistinct double sub-basal and antemedial lines. The orbicular spot is large, round, and white, while the reniform spot has a black outline and a double inner margin. The postmedial line is a double lunulate line filled with white, incurved at vein 2, and has fuscous suffusion beyond it. A series of small marginal lunules is present, and the cilia are chequered fuscous and white. The hindwings are slightly whitish and suffused with fuscous, with traces of a postmedial line. The underside has a cell-spot, a patch on the costa above the cell-spot, and a maculate postmedial line. In females, the hindwings are fuscous brown, while the forewings are similar to those of males. The larva is yellow with black spots. The first abdominal segment has a median dorsal rounded protuberance that is densely covered apically with short black hairs. The head and prothoracic shield are brown. The larvae feed on Elaeagnus species.
