This is the first species of Cicada to appear in the spring, and is found during November and December. Its larva (Fig. 3a) is a curious little animal, the two hind-legs being very long. I am at present unable to state with certainty what constitutes its food, but am extremely doubtful whether it consists of the juices imbibed from the roots of plants, as is generally supposed. The anterior legs, although probably chiefly constructed for digging, {120}appear to be also suited for raptorial purposes, which leads me to believe that the insect may be carnivorous in its habits. The pupa (Fig. 3b) does not materially differ from that of the last, except in size, and its empty exuvia is also frequently found attached to the stems of trees. The perfect insect may be at once discovered by the peculiarly shrill note emitted by the male. Family APHIDÆ. This family is extensively represented in New Zealand, but as I have not yet been able to obtain any information respecting their specific identity I am compelled to pass them by for the present, hoping that future investigation will reveal much that is interesting in their habits, and also help both gardener and agriculturist to protect himself from their ravages. Family COCCIDIDÆ. _Coelostoma zealandicum_ (Plate XX., fig. 4 [M]). This species is figured as a representative of this very curious family chiefly on account of its great similarity to a Dipterous insect, the rudimentary condition of its posterior wings being most perplexing to the beginner. Its habits have been amply described by Mr. Maskell, in his work on the Coccididæ of New Zealand, to which I consequently refer. Group HETEROPTERA. Family NOTONECTIDÆ. _Corixa zealandica_, n.s. (Plate XX., fig. 5). Abundant throughout the summer in all slow-running streams. The larva closely resembles the imago except that it has no wings. Its food probably consists of the juices of other insects. The present insect invariably swims with {121}its back exposed, thus differing considerably from the English Water-boatman (_Notonecta glauca_), whose keel-like back is kept beneath the water, while the two long hind-legs are rapidly moved backwards and forwards like oars. Family SCUTELLERIDÆ. _Cermatulus nasalis_ (Plate XX., fig. 6, 6a larva). This insect may be beaten out of various trees during the summer, and is usually taken in some abundance in February amongst white rata blossoms, on which it may be often observed sucking the honey from the blossoms with its long rostrum. Its larva, which is represented at Fig. 6a, is found in similar situations.