broad lateral wings, or lobes, swollen posteriorly; of a posterior appendage (b) divided at the end into three recurved hooks; and of a short penis (c) a little dilated at the tip. Many short hairs on all the appendages. Pupa flat, stationary; length about 1/16 in. Viewed dorsally the general colour is yellowish, but from the transparency of the body the green chlorophyll-food may be easily seen; head darker yellow; eyes obscurely facetted, red; rudimentary wing-covers greyish-white; antennæ yellow, darker at the tips; all round the margin is a fringe of long, white, glassy tubes set very close together. Head broader than long, slightly depressed in front. Eyes scarcely prominent. Antennæ of six joints—the first two short, the third equal to the first two together, fourth and fifth short, the sixth almost as long as all the rest together, tapering to a point and bearing at the tip two unequal spines. Rudimentary wing-covers attached to the thorax, but immediately widening anteriorly, so that they have the appearance of being joined also to the head; the hinder one reaches almost to the second segment of the abdomen. Legs thick; the second joint of the tarsus is exceedingly small; on the first joint is one long seta bent at the end; claw double, with a large pulvillus. Abdomen as broad as long, margin semicircular, with a very slight median depression; near the extremity the anal elongated ring is very slightly concave anteriorly, the ends compressed and somewhat acute. Rostrum short, cylindro-conical. The fringe of the body and wing-covers is formed of very delicate, glassy, straight tubes issuing from cup-like bases set close together. Larva active; length about 1/30 in.; general colour yellow. Viewed dorsally the head exhibits a darkish patch on each side of a median longitudinal yellow stripe; the thorax two patches on each side; the abdomen has four narrow transverse bands and a dark patch covering the posterior half. Antennæ of four joints—the first two short, the fourth about equal to the first two, the third as long as the others together; on the last joint are two unequal spines. Legs thick; second joint of the tarsus extremely small; two moderately long tarsal digitules. On the abdomen are some lanceolate spines. There is no tuft of cottony fibres on the abdomen. Hab. On Pittosporum cugenioides, Discaria toumatou, and Geniostoma ligustrifolium, throughout New Zealand; probably most frequently on Pittosporum. This very handsome species seems clearly to belong to the genus Trioza, but differs in various points from described species. The genital plate of the male bears some resemblance to those of T. horvathi, Löw, T. walkeri, Löw, and some others; but the posterior process, with its three hooks, seems