Hab. On Eucalyptus globulus, throughout New Zealand. The insects are found in numerous colonies, adults, pupæ, and larvæ intermingled, on the youngest shoots only of the tree, congregated between the stem and the immature leaflets, the spaces filled with their loose white cotton and meal. They do not seem to do any damage to the tree. The leaves of E. globulus in their very young state are quite different from the older ones (which latter, indeed, are not, I believe, strictly speaking, real leaves)—they have a distinct bluish tinge, whence the tree has derived its trivial name of “blue-gum,” and they exude a quantity of white aromatic gummy matter, on which apparently Rhinocola eucalypti feeds, so that the leaves themselves are not damaged. The insects are not particular about the seasons; all stages may be found at any time of the year in colonies, though in cold weather the winged adults seem sleepy and sluggish. Eucalyptus globulus is a Tasmanian tree, and Tasmania may therefore be the original home of this Rhinocola. I have not found the insect on any other tree in New Zealand, but on E. globulus it is very common. I have attached this insect to the genus Rhinocola on account of the straightness of the veins in the forewing (in Aphalara they are usually much curved) and the absence of processes from the genital plate of the male. There are some minute differences from the genus, and the genitalia of the male, taken by themselves, might relegate it to the genus Psylla (compare P. viburni, Löw, or P. salicicola, Forster), but the wing-venation fixes it amongst the Aphalarinœ. The late Mr. J. Scott informed me that in the British Museum there are no specimens of Psyllidœ from this part of the world, but that in one of the drawers there is “a label relating to a species feeding on the Eucalyptus.” I cannot say whether this may refer to our species; but probably it is rather one of the three described by Mr. Dobson (“Proc. of Roy. Soc. of Tasmania,” 1850, p. 235). These insects form little waxy conical or scallop-shaped tests on various Eucalypti in Australia, which tests are often aggregated in great masses of “manna,” used as food by the aborigines, and very sweet to the taste; indeed, a hungry European explorer lived awhile, on one occasion, on this “lerp,” as it was called. The adults of Mr. Dobson's species differ slightly from our Rhinocola. In their wax-producing habit they are entirely distinct. Rhinocola fuchsiæ, sp. nov. Plate XII., figs. 13–25. Adult female when first emerging from the pupa-case very light yellow, almost white. Later, the head and dorsal surface of the thorax become patched with black, the abdomen remaining yellowish. Eyes brownish-red, ocelli dark-yellow.