The expansion of the wings is about 1½ inches. The fore-wings are dark grey crossed by four wavy, black-margined, transverse lines; beyond the outermost of these lines there is a black band running parallel with the termen, and beyond this again a broader band of the ground colour; the orbicular spot is very minute and dull white; the reniform, which is surrounded by a black shading, is large, yellow towards the costa, and white towards the termen. The hind-wings are dark grey. The females are generally much darker than the males, some specimens having the fore-wings very dark brownish-black. Both sexes vary a good deal in the depth of colouring, but the markings appear to be quite constant. The larva is dark brown, tinged with pink; the subdorsal region is paler, there are a series of diagonal blackish stripes on each segment, and the anterior portions of the larva are much darker than the rest of the body. The specimens I reared were fed on lettuce, but I expect that the caterpillar feeds on low plants generally. It is full grown about January. The pupa state is spent in the earth. The moth appears in January, February, and March. It is very common at the flowers of the white rata, and may also be attracted by sugar and by light. ORTHOSIA IMMUNIS, Walk. (_Tæniocampa immunis_, Walk., Noct. 430. _Cerastis innocua_, ib. 1710 (locality probably erroneous). _Agrotis acetina_, Feld., Reis. Nov. pl. cix. 6. _Orthosia immunis_, Meyr., Trans. N. Z. Inst. xix. 30.) (Plate V., fig. 29.) This species has occurred at Wellington in the North Island, and at Blenheim in the South Island. The expansion of the wings is 1-3/8 inches. _The fore-wings vary from bright orange-brown to dull reddish-brown_; there is an obscure black dot near the base, a faint transverse line at about one-fourth; the orbicular is oval, faintly outlined in brown; the claviform is very faint, its position indicated by a small brown dot; the reniform is large, oblong, much indented towards the termen, doubly outlined with dull yellow and containing a blackish spot towards its lower edge, its posterior margin is shaded with dark brown; there are several faint, wavy, transverse lines near the termen, and the termen itself is shaded with brownish-black; the cilia are reddish-brown. The hind-wings are dull grey; the cilia are pale reddish-ochreous tipped with white. _The head is covered with scattered white scales_, the thorax is reddish-brown, and the abdomen is grey tipped with reddish-brown; _the upper joints of the tarsi of the anterior legs are white_. The perfect insect appears in January, February, and March. It frequents the blossoms of the white rata, where it occasionally may be taken in the daytime, but more frequently at night. It is not, however, a common species. Genus 3.--XANTHIA, Tr.